Although the known shorefly fauna of these quays is relatively diverse and includes 56 species in 31 genera, none of the species are believed to be endemic, i.e. the species are introductions from the mainland. METHODS AND MATERIALS.—The majority of specimens for this project were collected with an aerial net, but a few were collected in Malaise traps, and even fewer were attracted to and collected from black light traps.
Athyroglossa {Athyroglossa) glaphyropus Loew
Placopsidella cynocephala Kertesz
FIGURES 35-38.—Scanning electron micrographs of Mosillus stegmaieri (Belize, Stann Creek District; scale length in parentheses; scale bar for all photographs = Fig. 38 ): 35, mesonotum, dorsal view (0.43 mm); 36, notopleuron, lateral view (150 \im); 37, bust, side (0.27 mm); 38, anterior bone, posterior side (136 > im). . in front of the anterior eye, not far ahead, behind the front half of the forehead); evenly and moderately dense microtomentum on femur (not with anterior half distinctly more densely microtomentose); pleural areas uniformly microtomentose, without distinct spots or streaks; broad shield (as wide or wider than long); and the characteristic conformation of male terminalia (Figures 45, 46). FIGURES 39-44.—Mosillus stegmaieri: 39, external structures of male terminalia (epandrium, cerci, surstyli), posterior side; 40, external structures of male terminalia (epandrium, cerci, surstyli), lateral view; 41, aedeagal apodeme, ejaculatory apodeme and aedeagus, lateral view; 42, gonites and hypondrium, posterior side; 43, aedeagus and aedeagal apodemes, posterior side; 44, gonite and hypondrium, lateral view.
Ochthera loreta Cresson
NATURAL HISTORY.—Despite extensive river sampling, this species has only been found at the above locations. DIAGNOSIS.-This species differs from congeners in the following characteristics: genal height less than width of first flagellomere; pour the cross vein dm-cu lightly; acrostichal appendages (Fig. 51) in four rows, appendages in each row sparse, usually six or fewer; scutellum disc (Figure 52) either without setules or sparse, 1-2; femora and tibia grey.
Ptilomyia lobiochaeta Sturtevant and Wheeler
Ptilomyia parva (Williston)
Ptilomyia mabelae (Cresson)
Allotrichoma (Pseudohecamede) adustum Mathis
FIGURES 60-63.—Allotrichoma abdominale: 60, male terminalia (West Indies: Dominica), lateral aspect; 61, male terminalia, posterior aspect; 62, male terminalia, anterior aspect; 63, male terminalia (West Indies: . Dominica), lateral aspect. NATURAL HISTORY.-On Belizean bays this species occurs mostly in the coastal area, especially where organic debris has accumulated. The ventral half of the anepisternum and katepisternum is brown, mostly unicolored in this species.
Diphuia nasalis Wirth
Hecamede (Hecamede) brasiliensis Cresson
FIGURES 73-80.-—Diphuia nasalis: 73, fifth tergite and stemite, lateral view; 74, fifth tergite, dorsal side; 75, male terminals (epandrium, cercus, surstyli), lateral view; 76, gonit, side view; 77, internal male terminals (gonitis, hypandrium, aedeagal apodeme, aedeagus), lateral view; 78, aedeagus and aedeagal apodemes, lateral view; 79, hypandrium, aedeagal apodeme and aedeagus, ventral view; 80, hypandrium, lateral view. The forebasitarsus of the male is normally developed, without a distinct set of appendages; face whitish gray, in contrast with the darker brown foreheads of G.
Glenanthe ruetzleri Mathis
FIGURES 84, 85.—Hecamede (Hecamede) brasiliensis: 84, male terminals, lateral view; 85, internal structures of male terminalia, lateral view. Other Ephydridae collected from algae included species of the tribe Discocerinini (Discocerina and Polytrichophora) and the genus Paralimna.
Glenanthe caribea Mathis
Glenanthe litorea Cresson
DIAGNOSIS.-This species is distinguished from its congeners by the following combination of characters: wings without patterns;. DIAGNOSIS.-This species is distinguished from its congeners by the following combination of characters: wings without pattern;. DIAGNOSIS.—Lipochaeta is a monotypic genus and is easily distinguished by altered body conformation (attenuated or absent setae, antennae within deep, well-separated facial furrows, grayish to grayish-brown coloration), which is an adapted psammophilous habitat.
Paraglenanthe bahamensis Wirth
FIGURES 97-101.—Glenanthe ruetzleri: 97, structures of the male terminalia (epandrium, cerci, surstyli, aedeagus), posterior aspect; 98, structures of the male terminalia (epandrium, cerci, surstyli, aedeagus, aedeagal apodeme, hypandrium), lateral aspect; 99, aedeagus, aedeagal apodeme, lateral aspect; 100, base of aedeagus, posterior aspect; 101, apex of surstylus, lateral aspect. Antenna mostly yellow, although with dorsal surfaces of pedicel and 1st flagellomere blackish; anterior margin of frons just above antennae reddish. Parafacial densely microtomentose, silvery white, contrasted with mostly black face; face with three vertical stripes, laterals slightly irregular.
Discocerina (Discocerina) flavipes Cresson
FIGURES 106-110.—Glenanthe caribea: 106, structures of male terminalia (epandrium, cerci, surstyli, aedeagus), posterior side; 107, structures of male terminalia (epandrium, cerci, surstyli, aedeagus, aedeagal apodeme, hypandrium), lateral view; 108, aedeagus and aedeagal apodemes, lateral view; 109, base of aedeagus, posterior side; 110, tip of surstyle, side view.
Discocerina (Discocerina) obscurella (Fallen)
However, the widespread distribution may be an artifact that reflects our lack of knowledge about the systematics of this species. For example, there are no recent taxonomic studies of the European species of Discocerina, and the older literature lacks sufficient detail, such as structures of the male genitalia, to facilitate reliable and accurate identifications.
Discocerina (Discocerina) juniori, new species
Discocerina (Lamproclasiopa) nitida Cresson
Discocerina {Lamproclasiopa) mera Cresson
Antenna mostly yellowish; parafacial silvery white, contrasted with predominantly yellowish face; face yellowish, outer side edges brownish black; abdomen with wedge-shaped, silvery gray microtomentose areas laterally on tergite 4 and sometimes on tergite 3.
Hydrochasma incisum (Coquillett)
Hydrochasma faciale (Williston)
Polytrichophora agens Cresson
DIAGNOSIS.—This species can be distinguished from congeners by the following combination of characters: large specimens, length 2.3-2.9 mm; parafacial coloration not markedly different from that of center of face; parafacials becoming much wider ventrally; gena high, height about equal to combined length of pedicel and first flagellomere; forefoot lacking row of 9-10 short, stout setulae along apical half of anteroventral surface; fifth tergite of male not markedly narrowed posteriorly; and conformation of the structures of the male terminalia, especially the ventral one-third of the epandrium, which is strongly curved anteriorly, tapering, forming a beak-like process.
Polytrichophora conciliata Cresson
Polytrichophora pulchra (Cresson)
Polytrichophora reginae, new species
Abdomen: Tergites dull to subglossy, gray to black brown; tergites 1 -4 bicolored, mostly blackish brown dorsally, gray lateroventrally; tergites 3-4 of male subequal, 4th not uncommonly longer, 3rd tergites not produced ventrolaterally;. 5th tergite of male in dorsal view obtuse, bearing row of 6-10, distinctly larger setae along extreme posterior margin with posterodorsal orientation; 5th tergite of male also gray on posterior one half to one third; 4th and 5th sternites of male with dense row of setulae along posterior margin. DIAGNOSIS.—This species is readily distinguished from congeners by the following combination of characters: parafacial concolorous with median plane; parafacial with little or no dilatation ventrally; face monochromatic; mesonotum at most subglabrous, grey-brown to brown; forefoot lacking comb-like row of stout, anteroventral setulae; tibiae yellow; and fifth tergum of male in dorsal view obtuse, with 6-10 distinctly larger setae along posterior margin with posterodorsal orientation.
Ceropsilopa coquilletti Cresson
Thorax, legs and basal segments of abdomen whitish yellow; face, anterior xli of frons, and mesonotum dense, whitish microtomentose. Legs, including coxae, entirely yellow; 1st flagellomere about twice the length of the stem; arista with about 8 dorsal rays; lateral margins of face with silvery white microtomentum C. Coxae and middle and hind femora dark, sometimes black; 1 st flagellomere about three times the length of the stem; arista bearing about 11 dorsal rays; face completely shiny, deep purple black C.
Ceropsilopa costalis Wirth
ETYMOLOGY.—It is a pleasure to name this species after Regina Lewis, frequent matriarch of Carrie Bow Cay and whose many cooking skills made our visits to Carrie Bow Cay so enjoyable. FIGURES 151-154.—Ceropsilopa costalis: 151, external male terminalia, posterior aspect; 152, same, lateral aspect; 153, internal structures of male terminalia, ventral aspect; 154, same, lateral aspect. DIAGNOSIS.—This species is distinguished from congeners by the following combination of characters: first flagellomere elongated, about three times the length of the stem; pedicel small.
Leptopsilopa similis (Coquillett)
Clasiopella uncinata Hendel
Guttipsilopa (Nesopsilopa) dianneae, new species
161, compound eye and intermediate setae, lateral view (30 (im); 162, ditto, enlargement of intermediate setae, lateral view (6 \im). DISTRIBUTION.—So far this species is known only from the type series, which is from the Belizean Cays in Stann Creek District FIGURES 175-177.—Guttipsilopa dianneae, new species: 175, male terminalia, lateral view; 176, same, posterior view; 177, internal structures of male terminalia.
Paratissa neotropica Mathis
NATURAL HISTORY.—This is one of the most abundant shoreflies found on the Belizean bays. DIAGNOSIS.—I can distinguish this species from congeners only by referring to characters of the male terminalia (Figures 194-198), especially the shape of the surstylus. DIAGNOSIS.—This species is distinguished from the previous one and from other congeners by characters of the male.
Paralimna (Phaiosterna) decipiens Loew
FIGURES 230-233. Male terminalia: 230, Paralimna obscura, aedeagus and lateral aedeagal process, lateral aspect; 231, same, posterior aspect; 232, Paralimna decipiens, aedeagus and lateral aedeagal process, lateral aspect; 233, same, posterior aspect. Arista has at most small hairs, no longer than aristal width at the base; anterior and posterior notopleural setae inserted equidistant from notopleural suture (HYADININI) Hyadina Haliday Arista with numerous, long, dorsally branching rays;
Zeros fenestralis (Cresson)
Zeros flavipes (Williston)
Zeros obscurus (Cresson)
Hyadina bulbosa Clausen
Hyadina flavipes Sturtevant and Wheeler
Garifuna sinuata, new species
Abdomen: Uniformly black brown, moderately microtomentose, opaque in appearance; second and third tergites subequal in length, fourth longer, fifth male much longer, subequal to combined length of second and third; fifth sternite short, broad, broadly U-shaped, each leg robustly developed, especially near rounded corners of U, with numerous setae. REMARKS.—The patterned wing is characteristic of this species, and will doubtless distinguish it from congeners, if any, which may be discovered. Genae usually have distinct appendages that are much longer and stronger than other genal appendages, but if distinct appendages are lacking, there is no presutural dorsocentral appendage.
Cirrula austrina (Coquillett)
Male terminalia (Figs 238-241): epandrium reduced, narrow, arched girdle with irregular posterior margin, mostly without setae; cerci semicircular, longer than wide, dorsally narrowed, regularly developed, ventrally not adnate; surstylus relatively reduced, simple, narrow, shallowly bent posteriorly, finger-like process bearing 4-5 apical setules, 2-3 setules long; aedeagus pointed at apex, widest subbasally, slipper-like in lateral view, length subequal to length of aedeagal apodeme; aedeagal apodeme in lateral view of nearly parallel sides, longer than wide; gonitis greatly enlarged, asymmetrical, right gonitis more sparulate and more evenly rounded, left gonitis with subapical tooth along posterior margin, generally more narrowly developed; hypandrium longer than wide, somewhat rectangular with rounded corners, located between arms of fifth sternite.
Dimecoenia spinosa (Loew)
FIGURES 242-245.—Cirrula austrina: 242, head, lateral view; 243, ditto, front; 244, mesonotum, dorsal side; 245, hind leg of male, lateral view and dorsal view of tarsus. FIGURES 246-248.—Cirrula austrina: 246, abdominal vessel of female, lateral view; 247, male terminals, lateral view; 248, ventral margin of epandrium and surstylus, posterior side.
Haloscatella muria (Mathis)
Scatella (Scatella) obscura WiUiston
FIGURES 253-255. Dimecoenia spinosa: 253, male terminalia, lateral aspect; 254, ventral edge of cpandrium and surstyli, posterior aspect; 255, female ventral receptacle, lateral aspect. FIGURES 256-258. Haloscatella muria: 256, head, pale aspect; 257, male terminalia, posterior aspect; 258, Internal structures of male terminalia, lateral aspect. DIAGNOSIS. This species is distinguished from related conspecifics by the following combination of characteristics: general color brown; mesophrons partly microtomentose, subglossy; gena low, height less than one-third eye level; wing drenched and with several pale spots; both notopleural hairs are inserted at approximately the same level.
Scatella (Scatella) favillacea Loew
Among the species occurring in half or more of the cays (Table 6), over half (eight of 13 species) occur on Glover's Reef (Table 5). An annotated systematic arrangement of the genera and species of Neotropical Ephydridae (Diptera), I: Subfamily Psilopinae. A systematic arrangement of notes on the genera and species of Ethiopian Ephydridae (Diptera), I: Subfamily Psilopinae.
