732 ASILID^ 



D. atricapilla ought not to be mistaken for D. Baumhaueri, as it is a 

 stout strongly built species with conspicuously dark wings while D. 

 Baumhaueri is a slightly built species with almost hyaline wings. D. 

 Reinhardi is easily recognised in the male by its peculiarly colored femora, 

 while the conspicuous absence of the shimmeiing pale stripe down 

 the front of the pleurae and the abundant face-beard distinguish it from 

 all other species. D. rufi^es has the front femora without any black 

 dorsal marking and has the frontal prominence larger than in any other 

 species, while D. Baumhaueri has the front femora with at least a blackish 

 dorsal streak. 



1, D. atricapilla Meigeu. Legs black except on the reddish knees. 

 Wings indeterminately blackish on the basal half in the male, but 

 brownish in the female. 



The most stoutly built species in the genus. 



1^ . Moderately shining black. Face shimmering dull brown, but shining black 

 immediately under the antennse, very slightly produced at the upper mouth- 

 edge, and bearing there the face-beard which is in almost a single row of 

 about ten long black bristly hairs with sometimes a few additional small 

 hairs ; sides of the mouth shining black and bare ; chin- and jowl-beards rusty 

 black ; back of the head almost flat and with a narrow bare greyish brown 

 postocular rim (shimmering white in some lights on the lower half) which is 

 flush with the eyes except slightly on the wider lower part ; behind this rim 

 are abundant long black bristly hairs, which are rather thin and crowded on 

 the lower part but gradually become stouter and scarcer (though still 

 numerous) as they ascend towards the top of the head, where they stand 

 further back from the eyes ; some tiny black hairs occur close to the 

 top corners of the eyes ; frons shining black, deeply sunk between the eyes, 

 and with a few inconspicuous short black hairs on the orbits ; ocellar knob 

 very much elevated and bearing a few minute black bristles on the upper and 

 hind part ; antennal prominence neither large nor prominent though wide 

 and fairly high, shining black, and bearing numerous black bristly hairs on 

 the sides ; collar shining black, and bearing inconspicuous black hairs. 

 Proboscis long and shining black, with the dorsal tuft near the end composed 

 of unusually long brown hairs and numerous tiny ones, while the long hairs 

 beneath near the base are also dark ; palpi shining black, not half so long as 

 the proboscis, and bearing about the tip long projecting black bristly hairs, but 

 with shorter thin brownish hairs about the base. Antennae shining black on 

 the two basal joints ; basal joint more than one and a half times as long as 

 the second, and bearing more numerous and longer black bristly hairs ; third 

 joint dull black, as long as the basal two together, and bearing at its tip a 

 stout minutely pubescent style which is nearly half as long as the third joint. 

 Thorax black, with only the points of the humeri just above the pro- 

 thoracic stigmata orange, densely punctate and consequently rather dull, but 

 the slightly raised middle stripe bears two less punctate (though finely trans- 

 versely striate) lines and the large humeral spaces are shining and almost 

 impunctate. Pubescence all over the disc (except on the polished parts) 

 composed of very short rusty black hairs. Bristles limited to the usual prse- 

 sutural one and several supra-alar, the postalar calli being without distinct 

 bristles. Pleurae polished shining black, with the usual "shimmer stripes" of 

 tomentum complete and usually brownish orange but the hypopleural stripe 

 rather vague and undefined ; mesopleurai with black (or partly brownish 

 yellow) pubescence about the front corner and down the stripe on its 

 back part, and the sternopleurse with similar pubescence on the front 

 point ; metapleuras with rather numerous thin black hairs, but with the usual 

 fan rather weak as it may range from only two long bristly hairs up to about 



