Individual units of the mesh are pentagonal when closely grouped (Figures 61, 62), but lack angular margins when occurring singly (Figure 79). The flat setae of the comb-like row are called smooth setae in the species descriptions that follow.
Stenhelmoides inconscriptus, new species
Metasternum with disc depressed; with gray plastron except reddish black intercoxal process and shiny median reddish black area extending posteriorly from meso-. Protibia straight; cleaning margin occupies distal 3A of anterior surface, bordered medially by row of short scraping setae.
Stenhelmoides rufulus (Hinton)
Each elytron with a median and submedian longitudinal row of low granules (Figure 28); median row bounds lateral area of gray plastron and medial reddish area; reddish area with 2. One male from Ecuador had not only full development of mesh plastron between the grain rows, but slight development medial to the submedian row of grains.
Stenhelmoides pubipes, new species
Clypeus granular, reddish, sparsely pubescent labrum with transverse row of hair-like setae near parietal third. Thorax: Pronotum, 1.20 mm long, 1.32 mm wide; with a gray plastron, except for a large median reddish-black area (Fig. 3), the surface of which is opaque between the granules; exceptionally. Each elytron with median longitudinal row of low granules demarcating lateral area of gray plastron and medial reddish black area; row of granules becoming obsolete where the junction of the gray and reddish black areas is inclined laterally to the humeral angle; type of granules.
Metasternum (Figure 50) with disc depressed; with gray plastron except reddish black intercoxal process and median reddish black area extending from mesocoxae and gradually widening to occupy area between metacoxae; prominent tubercle (Figures 50-52) on each side of reddish black area in front of metacoxae; lateral area of gray plastron with granules slightly smaller than largest granules of pronotum and separated by 2 to 3 times granule diameter, midline with moderately deeply depressed line;. Foreleg with short patch of long setae at midlength of anterior surface of femur; tibia arched; cleaning margin occupying distal 3A of anterior surface, bordered medially by row of short scraping setae. Hind legs with tibial cleaning margin (Figure 56) occupying distal 4/5 of posterior surface and bordered laterally by row of short, densely spaced smooth setae and surrounded medially by row of more widely spaced, short, scraping setae; tarsal segments 1-4 with short setae ventrally.
Abdomen: With gray plastron and granular like lateral areas of metasternum, except for intercoxal process with reddish-black gloss. Females have the metasternal disc less depressed and have the median reddish-black area confined to the median longitudinal sulcus. VARIATION.—Some specimens have the gray pronotal plastron slightly touching the sides of the reddish-black hexagonal area.
Stenhelmoides antennarius, new species
ETYMOLOGY.-From the Latin pubipes (hair), plus pes (leg), in reference to the long, golden, hair-like setae on the middle legs of males of this species. Thorax: Pronotum, 1.24 mm long, 1.32 mm wide; with gray plastron except for large median red-black area (Figure 4); cuticle of dull reddish black area between grains;. Each elytron with a median longitudinal row of granules delimiting lateral area of plastron gray and median area reddish black (Figures 73, 76); row of granules almost reaching elytral base, becoming less discrete as a row beyond elytral declivity; junction of gray plastron and reddish black area diverging obliquely from grain row.
FIGURES 82-90.-Sunhelmoida antennarius, new species: 82, profemur, anterior face, xl50; 83, procibial scraping setae, xl85; 84, prodbial cleaning fringe, x200; 85, middle leg, lateral surface, xlOO, 86, mcsodbial fringe of cleaning and smoothing setae, xl5O, 87, mesotibial cleaning rim and smoothing setae, enlarged, xlOSO;. Median area red black of elytron with second longitudinal row of granules similar in size to those of median row; row nearer the median row than the suture, extending almost to the base, terminating just before the apex; also with 4 rows of lightly impressed perforations, 2 rows between rows of granules.
Stenhelmoides submaculatus (Hinton)
Pronotum black except anterior sixth rufous; basal margin reddish black; gray plastron extensive, as illustrated (Figure 97). Prosternum, 0.60 mm long; with gray plastron except apicomedial 2/s reddish and shiny; slightly elevated to form an angle with the anterior part of the prosternal process; surface with granules larger than those on lateral surface of hypomeron, but becoming finer on apex of prosternal process. SEXUAL DIMORPHISM.—The female is similar to the male, except that the antennal acetabula are slightly more widely separated (0.12 mm).
The male genitalia of the holotype were dissected and illustrated by Hinton for his description; however, the dissection (colored red) attached to the point next to the male is so badly fragmented that only the median lobe is discernible, and therefore, we left the mount as it was. Furthermore, Hinton's illustration is so small and the illustration of genitalia unlike any other known to us. the species should be easily recognized when found again.
In the unlikely event that Hinton's illustration of the male genitalia is quite accurate, we have enlarged his illustration and included it with this re-description (Figures 123, 124). The abdomen of the female paratype from the Deutsche Entomologische Institut was cut from the beetle and attached to the point next to the specimen. Below the abdomen was a small mass of tissue with part of the female genital organ visible within i t We placed the entire specimen in hot water and removed it from the drop; the beetle was cleaned as much as its condition would permit, and the female genitalia were cleared in KOH and illustrated (Figure 125).
Stenhelmoides grandis, new species FIGURES 98,127-155
The front surface of the prof em ur with only 2 long, slender, golden hairy appendages in the middle (Fig. 141). Posterior surface of mesofemur with distinct row of long hair-like setae in middle. Protarsal, mcsoiarsal and metatarsal segments with short sparse setae ventrally; tarsal segments 1-4 of protarsus (Figs 139, 140) and mesotarsus with moderately dense hair-like setae, setae nearly as long as width of second tarsal segment.
The black macula described for the profemora and mesofemora of the holotype is indistinct on several specimens on the ventral surface, but is clearly distinguishable on the upper surface, which lies against the sternum. Females do not have moderately dense hair-like hairs on segments 1-4 of the protarsus and mesotarsus. HABITAT. – The holotype and three additional specimens were collected from the rocky shoals (Figure 155) of the Rib Baria at Cerro de la Neblina, Venezuela; height, 140 m.
Protarsal and mesotarsal segments (Figures 163, 164) with dense hair-like setae ventrally; metatarsal segments with sparse setae ventrally. TYPE DATA.-Holotype (male): ECUADOR: PASTAZA PROVINCE: 70 mi SE Limoncocha, on Rfo Cononaco, at Anglo air-strip, 1°19'S, 76°6'W, blacklight, 30 May 1976, Jeffrey Cohen; deposited in the National Museum of Natural History, Smithsonian Institution. ETYMOLOGY.-From the Latin platysternum, a noun in apposition; referring to the flat pectoral disc areas.
Stenhelmoides grouveUei (Pic)
Thorax: Pronotum 1.10 mm long, 1.12 mm wide in basal third; reddish covered with gray plastron except median reddish area (Figure 100); extremely shallow, median, interrupted, longitudinal line extending from base to midlength. Pronotal granules flat and slightly rounded; slightly smaller than the cheeks of the eyes; separated by 1 to 2 times the diameter of the granules, granules slightly more widely separated into apical and basal; granules in the median reddish area smaller and denser; each grain with a short basal seta; groups of all granules directed toward median basal fifth of pronotum. The granules on the intercoxal process are slightly smaller and as dense as the granules on the metasternal disc, becoming sparser and smaller laterally and apically.
The abdomen has been removed and pasted on another card below the card with the specimen (apparently from Deleve,. FIGURES 168,169.—Stenhelmoides gruuvellei (Pic): 168, Male genitalia, dorsal view. 169, Female genitalia view .dor, . who prepared a slide with the genitalia mounted). Next is a card bearing the symbol of the male sex, and then the following series of labels: Type [printed on red paper] / Type [handwritten] / Guyane Francse, St Laurent du Maroni, Le Moult Collection / Dicembre / Stenelmoides [sic] guyanen - sister Grouv.
2] copy on card / male gender symbol / Guyane Francse, Nouveau Chantier, LeMoult collection / September / Museum Paris, Leuirole collection /Prepar. DISTRIBUTION. Currently only known from the type locality at SL Laurent Maroni, French Guiana, and Nouveau Chantier, French Guiana (Figure 170). However, in 1967, Deleve may have realized something was wrong, as he received three more copies labeled respectively: [1] "Stenhelmoides strictifrons Grouv S.
Stenhelmoides variabitis, new species
DIAGNOSIS.-Members of the strictifrons group may be recognized by the following combination of characters. SEXUAL DIMORPHISM.-The females differ from the males as follows: metasternal disc and intercoxal area of first abdominal segment less deeply depressed; protarsal claws narrower; no tuft of sparse, long, golden, hair-like setae on ventral surface of last segment of mesotarsus. VARIATION.-Three of the 16 specimens in the type series have the plastron reddish overlaid instead of reddish black and 5 specimens have an indistinct transversely wrinkled cuticular surface.
The stream was about 8 m wide, x hm deep, had a rock and gravel surface and was in the shade most of the day. The male protarsal claws appear slightly wider than those of the females, but the difference is not great enough to separate. The only other difference noted in the specimens examined is the color of the dorsal surface; most are reddish covered by the gray plastron, while some are almost black.
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