TREATMENT OF INDIVIDUAL TAXONA.—The present contribution continues the format used in previous papers on systematics in this series on Ceylon wasps. The cell was 30° to the left of the axis of the pit and about 3 cm from it.
Stizus vespiformis (Fabricius)
Base color predominantly light red, followed by black: spots on scutum and mesopleuron, transverse band on dorsal surface of propodeum, spots on posterior surface of propodeum, posterolateral spots on tergae I–III and sterna II and III and occasionally. anterolateral spot on tergum II. Pale yellow markings usually distributed as follows: basal two-thirds of mandible, labrum, clypeus, anterior to level of antennal insertion or to anterior ocelli, band on posterior ocular margin, transverse posterior band on pronotum, including lobe, postscutellum, upper half or more mesopleuron, small spot above on metapleuron, most of lateral and posterior propodeal surfaces, large anterolateral spots or complete bands on terga I-VI or VII and on sterna I-V.
Bembecinus comberi (Turner)
Bembecinus comberi is known only in Sri Lanka and is widely distributed in a few locations in the northern half of the dry zone from sea level to about 100 m, with average rainfall. Black, following white to ivory: Basal half of mandible, labrum, clypeus entire or only narrow upper margin, median spot on upper half or more of supraclypeal area, narrow band along inner eye margin at half height of eye anterior ocellus, scales and flagellar segments below , very narrow apical band or pair of spots on posterior margin of pronotum extending over medial half or two-thirds, small posterolateral spot on scutum, anterior femur below, mid-femur with narrow stripe below , anterior surface of anterior and middle tibiae, anterior part of tarsi to varying extent anteriorly, occasionally middle segments of middle tarsi, narrow apical bands on terga I-V, slightly expanded medially but always wider laterally, on I often interrupted medially, and triangular posterolateral spots on sterna II-V tapering posteriorly. Median triangular area of propodeal dorsum with moderately large subadjacent dots arranged more or less in oblique rows laterally, the rows separated by about half the diameter of the dot; posterolateral margin of propodeum with a deep notch below (Fig. 1).
Ocular index 2.0-2.2; distance between antennal scrobe and base of clypeus 5.5 times as large as that between scrobe and inner eye margin. Second submarginal cell and propodeum as in female; posterior surface of hind femora with one subapical seta and two sensilla (Figures 9, 15, 16). Apical margin of sternum VI convex; basal half of sternum VII with strong median ridge;.
Bembecinus krameri, new species
A pair of paratypes will be deposited in the National Museums of Sri Lanka, Colombo, and a female paratype will be deposited in the British Museum (Natural History), London. Female paratypes are 8–9 mm long, the color pattern is very similar, except that the Indian specimen has more yellow on the tibia and tarsi, and sternum IV also has a small triangular posterolateral mark, and the ocular index is 2.3–2, 4. Male paratypes are 7.8–8.5 mm long, the color pattern is the same, except that the clypeus may be almost entirely yellow or almost entirely dark, the apical band on tergum I may be broadly interrupted in the middle, and tergum VI and sternum IV may lack pale spots.
The head is essentially female, except that the left antenna has 12 segments as in a normal female, but the eleventh segment has the normal spinous projection of the male and the twelfth is concave down as in the male. The thorax appears to be entirely female, and the fore tarsi bear the heavier spines typical of the female. The abdomen is male, but tergum VIII has a median apical cleft and sternum VI is apically deformed.
Bembecinus luteolus, new species
Ocular index 2.1; distance between margin of antennal scrobe and base of clypeus twice as great as that between scrobe and inner eye margin;. Coloration and vestiture as in female except as follows: propodeum with small median spot on dorsal surface, tergum VI with broad apical band, tergum VII with apical spot, and sternum V with small, triangular, posterolateral spot. Ocular index 2.4; distance from antennal scrobe to base of clypeus three times as long as distance between scrobe and inner eye margin;.
Two pairs of paratypes will be placed in the National Museums of Sri Lanka, Colombo, and one pair each in the British Museum (Natural History), London, and in the Rijksmuseum van Natuurlijke Historie, Leiden. Female paratypes are 4.3–6.8 mm long, have an ocular index of 2.1–2.3, and show little color variation as follows: two lack the apical spot on tergum VI, several have a small median spot on dorsal surface of propodeum, and the mesopleural spot varies in size but is always present. Male paratypes are 5.5-6.2 mm long, have an ocular index of 2.3-2.5, and show little color variation as follows: median spot on propodeal dorsum may be absent, sternum VI may have a triangular posterolateral spot have joined by a narrow apical stripe, and sternum VII may have an apical spot.
Bembecinus broomfieldi, new species
They differ from the Ceylonese population in having white rather than yellow abdominal markings and in having a small, central, pale spot on the apical margin of tergum IV, which is almost always absent in Ceylonese specimens. Black, the following yellow: palpi, labrum, clypeus except reddish median spot on apical margin, supraclypeal area, narrow stripe along inner eye margin halfway from antennae to anterior ocellus, antenna below, apical band on pronotum and lobe, stripe laterally on scutum except at base, large round lateral spot on scutellum, small transverse bar on middle of postscutellum, spot on posterolateral corner of propodeum, fore and midcoxae except base, fore and mid femora below, outer surface of tibiae, tarsi except posterior margin of forebasitarsus, wide subapical band on tergum I narrowed in middle, apical bands on II, III and V, those on II and III broad and shallow bilaterally anteriorly, those on V broad on lateral fourth and narrow on median half, posterolateral triangular spots on sterna II-V, decreasing in size posteriorly, those on II connected by a narrow apical band. Ocular index 1.9; distances unequal between antennal scrobe and base of clypeus and scrobe and inner eye margin; ocellar area without a median groove.
Ocular index 2.3; distance from antennal scrobe to base of clypeus 1.8 times as long as distance from scrobe to inner eye margin; ocellar area without median groove. Female paratypes are 6.5-7.5 mm long, have an ocular index of 1.9-2.0, and differ only slightly in color pattern as follows: clypeus varying in degree of dark markings to completely black, and band on tergum I is regularly divided in the middle. In the Indian paratypes, the abdominal markings are white rather than yellow, all have a small central spot on the apical margin of tergum IV, the band is complete on tergum I in three specimens, and one specimen has a small, round, lateral spot on tergum VI.
Bembecinus knighti, new species
Two pairs of paratypes will be deposited in the National Museums of Sri Lanka, Colombo, and one pair in the British Museum. Male paratypes are 5.5-7.5 mm long, the ocular index is 2.1-2.3, and the coloration in Ceylonese males varies as follows: the thoracic markings are reduced in size in one specimen, and one specimen has a small median spot at the apex of tergum IV. Color as in female except as follows: basal two-thirds of mandible pale; stripe on scutum extending beyond;.
Eye index 3.2; distance between antenna and base of clypeus 6.0 times greater than distance between antenna and inner eye margin; A pair of paratypes will be deposited in the National Museums of Sri Lanka, Colombo, and a female paratype in the British Museum (Natural History), London. Female paratypes are 7.7-8.7 mm long, ocular index is 2.6-2.7, two specimens lack the mesopleural spot.
Bembecinus pusillus (Handlirsch)
Apical margin of sternum VI wide and shallowly flared; sternum VII with median border on the basal half; ventral aspect of genitalia of paratype (Figure 21), outer edge of paramere narrowed in the middle, cusps relatively longer than in B. Black, the following white to ivory: palpi, labrum except a median basal spot of variable size, clypeus rarely, rarely part of the supraclypeal region, narrow short line along the inner ocular margin from the upper margin of the antennal cup halfway to the anterior ocellus, antenna below, narrow apical edge of pronotum and lobe, narrow band on posterior two-thirds of the lateral edge of scutum, spot on the lateral fourth of the scutellum, band on the median half of the postscutellum, narrow band on the posterolateral edge of the propodeum, apices narrow of the coxae, band below on the front and middle femora, the basal half of the outer surface of the tibiae, the anterior half or more of the anterior tarsal segments A pair of broad subapical spots on the first abdominal tergum, sometimes joined on the midline, apical bands on the second and fourth terga with broad and shallow bimarginate anterior margins, band on the second broader, small median triangular spot on the third tergum at the apex, small round lateral spot on the fifth tergum, and posterolateral triangular spots on the second through fourth sternums, decreasing in size posteriorly. Ocular index 1.9-2.1; the distance between the margin of the antennal scrobe and the inner ocular margin is less than that between the scrobe and the base of clypeus; ocellar area without medial groove behind the anterior ocellus.
Coloration as in female except as follows: most or all of clypeus and supraclypeal area, stripe along inner margin of eye occasionally extending downward to base of clypeus, lateral stripe on scutum varying in extent but never reaching base, usually all outer side of tibia - finally, spots on tergum V sometimes extended towards middle to form a band, spots on sternum II rarely united by a narrow apical band, and sternum V usually with a small, posterolateral, triangular spot. Ocular index 2.3-2.4; distance between antennal scrobe and base of clypeus 1.7–2.0 times distance between scrobe and inner eye margin. Apical margin of sternum VI wide and shallowly emarginate; sternum VII without a median spine; ventral aspect of genitalia ( Figure 19 ), outer margin of paramere narrowed at middle, its tip more narrowly rounded than in B .
Bembecinus proximus (Handlirsch)
An ethological study of the digger, Bembecinus neglectus, with a review of the ethology of the genus. The Comparative Ethology and Evolution of the Sand Wasps, xviii + 526 pages, 215 figures, 47 tables, Cambridge: Harvard University Press. Requests for special treatment - use of colors, folds, covers, bound in case, etc. - request additional approval from the sponsoring body on the same form.
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