LIST OF DIPTERA. 405 



thickly beset with black bristles : eyes bronze ; fore part nearly flat, 

 its facets much larger than those of the other part : lip black, 

 clothed at the tip with short pale yellow hairs ; palpi black, beset 

 with long black hairs : feelers black ; first and second joints clothed 

 with short black hairs ; second joint not half the length of the first : 

 chest ferruginous, clothed with black hairs, beset on each side and 

 behind with black bristles, adorned with three broad piceous stripes : 

 breast grayish ferruginous : abdomen black, much more than twice 

 the length of the chest, thinly clothed with black hairs, tapering 

 from the base to rather more than two-thirds of the length, thence 

 to the tip compressed and very slender ; a hoary stripe on each side ; 

 hind borders of the segments dark ferruginous; first and second 

 segments short ; hind border of the second segment pale tawny ; 

 third and following segments long, but successively decreasing 

 in length : legs black, clothed with black hairs, beset with black 

 spines; shanks and feet covered beneath with dark ferruginous 

 down ; claws dark ferruginous at the base ; foot-cushions pale taw- 

 ny : wings brown ; wing-ribs and veins black ; poisers ferruginous. 

 Length of the body 10 lines ; of the wings 14 lines. 



Asiltjs Haloesus, n. s., mas. Fuscus, thorace fulvo vittis quatuor 

 fuscis, peciore abdominis segmentorum marginibus posticis ven- 

 treque cinereis, apice albo, antennis nigris, pedibus rufis, nigro 

 variis, alis subfulvis. 



Body brown : head nearly as broad as the chest, covered with 

 tawny down, clothed behind and beneath with whitish hairs ; crown 

 beset with a few whitish hairs on each side ; clypeus prominent, 

 thickly armed with black bristles and whitish hairs : eyes dark 

 bronze ; fore part slightly convex, its facets larger than those of the 

 other part : lip black, clothed at the tip with short tawny hairs ; 

 palpi black, clothed with white hairs : feelers black ; first and 

 second joints beset with short stout black hairs ; second joint about 

 half the length of the first ; third joint spindle-shaped, as long as 

 the first ; bristle about twice the length of the third joint : chest 

 dark tawny, clothed with short black hairs, beset on each side and 

 behind with some black bristles, adorned with four dark brown 

 stripes, of which the side pair are shorter and broader than the 

 middle pair, and are each interrupted by two short oblique bands : 

 breast gray : abdomen brown, much narrower than the chest, and 

 more than twice its length, slightly tapering from the base to the 

 tip, clothed with hoary hairs, which are most frequent at the base ; 

 sides and hind borders of the segments and the whole of the under- 

 side hoary ; two last segments white ; sexual parts large, piceous, 



