638 ASTLID^ 



occasionally both white, while sometimes a smaller third bristle occurs con- 

 siderably in advance of the other two ; supra-alar two (2-3) long and some- 

 times both black but both varying to white, and the second one (which is far 

 away from the wing-base) sometimes represented by two bristles close 

 together ; postalar two on the lower end of the callus, long and usually white 

 but each varying in colour, while sometimes a smaller white one occurs nearer 

 the base of the callus ; dorso-central (on the light grey stripes) about four 

 (2-5) postsutural of which the middle two are the strongest and the one 

 nearest the scutellum sometimes so weak as to be almost confused with the 

 finer pubescence, and four or five small prsesutural which are obvious only 

 because they occur on the light grey stripes or otherwise they would almost 

 merge into the surrounding small black bristles. Pleurae yellowish grey but 

 with a large dark indefinite cloud on the middle part of the mesopleurse ; 

 pubescence rather abundant long and pale on the prothorax and on the space 

 between that and the front coxae and also on the upper part of the sterno- 

 pleurae, slight and inconspicuous on the upper part of the mesopleurae but 

 forming a tuft at the back of the upper part of the pteropleurae, while the 

 metapleural fan is composed of long strong bristly hairs and some finer hairs, 

 and the hypopleural fan and pubescence are similar but less dense. Scutellum 

 (when seen from behind) light ashy grey, bearing numerous very thin 

 yellowish white hairs with which black hairs are not uncommonly inter- 

 mingled, and with two long rather thin (almost always) whitish upturned 

 marginal bristles ; metanotum ashy grey, bearing a patch of rather short 

 coarse brownish yellow pubescence about each hind corner. 



Abdomen (when seen from above) pale yellowish grey with rather lighter 

 grey bare hindmargins of segments, or (when viewed from behind) blackish 

 brown or brown with the bare hindmargins conspicuously pale grey (almost 

 whitish) and the sidemargins less definitely so, but from all points of view 

 with the genitalia shining black. Pubescence on the dorsum short, depressed, 

 and pale yellowish, with sometimes a very few black hairs (of a similar 

 nature to the yellow ones) down just the middle line, but the pubescence at 

 the sides of the two basal segments (especially the first) is long and out- 

 standing, and that across the prsehindmarginal crest of the basal segment is 

 but little shorter, whUe the third segment has a few similar outstanding pale 

 hairs at the sides, and the prsehindmarginal line on the second and third and 

 sometimes fourth segments bears a rather bristly fringe all across ; the outer 

 two or three hairs on each side of the fringe on the basal segment are strong 

 enough to be called bristles, while on the second segment there are about 

 three similar bristles on each side, and on the third segment about six which 

 die out into the prsehindmarginal fringe, and on the fourth segment also 

 about six which however merge still more into the fringe, until on the fifth 

 segment the side bristles become still less distinct, and on the sixth segment 

 any fringe is scarcely perceptible ; eighth segment very short, but distinct and 

 concolorous with the seventh. Belly of the same pale yellowish grey colour, 

 with long pale sparse pendent pubescence on the five basal segments ; hind- 

 margin of the fifth segment slightly dropped. Genitalia (including the 

 claspers) nearly as long as the sixth and seventh segments together, shining 

 black and not at all clubbed, all bearing conspicuous fairly long but not 

 dense pale yellow pubescence with a few inconspicuous black hairs inter- 

 mixed on the basal part ; claspers (when seen from above) sloping inwards 

 and rather stout for about half their length, but then suddenly and deeply 

 cut back so that the end halves form a pair of rather narrow forceps which 

 enclose an almost circular open space, while the basal halves enclose an ovate 

 space ; when seen quite sideways the claspers show but little of the middle 

 enlargement and appear to be long and narrow with a rather bluntly 

 rounded end ; lower lamellae short, rather dusted outside near the base, and 

 with a pair of inconspicuous chestnut processes between them. 



Legs black, but the minute recumbent yellowish or almost whitish 

 pubescence causes a greyish appearance, and reddish or greyish orange felt 

 covers the inner ( = posterior) apical half (or even the whole) of the hind tibiae 

 and the basal joint of the hind tarsi as well as the antero-ventral part of the 

 front tibiaj and the basal joint of the front tarsi ; coxae grey or whitish grey 

 like the pleura, with fairly conspicuous coarse but not dense almost whitish 



