Dolichopodidae. 



399 



Palpi white. Occiput black, grey pruinose downwards; postocular 

 bristles black above, yellowish below. Antennæ black, third joint 

 long, somewhat band-shaped, rounded at the apex, brownish; arista 

 inserted at the base. Thorax black, a little greenish or bluish^ much 



Fig. 128. Antenna of A. flaviventris d, from the inside. X 135. 

 From a dried object. 



shining. Pleura yellow, below the wing-root a black, triangular spot; 

 propleura with some pale hairs, Abdomen black, the larger basal 

 part (the four first segments) yellowish; it is clothed with short, 

 blackish hairs, and has short hindmarginal bristles, a little longer on 

 the first segment. Venter yellowish. Hypopygium black, the outer 

 lamellæ dark brownish, linear, with long hairs. Legs yellow, tarsi a 

 little darkened towards the end. The legs have short, black hairs; 

 posterior coxæ each with a black bristle ; front femora a little thickened 

 towards the base, with two rows of long bristles below; front tibiæ 

 likewise with two rows of finer bristles; front tarsi, especially meta- 

 tarsus, ciliated below ; middle femora with a row of about six ventral 

 bristles in the middle, the tibiæ with two antero-dorsal, one or two 

 postero-dorsal, and likewise one or two small ventral bristles below 

 the middle; hind femora with a ventral bristle before the middle, and 



Fig. 129. Antenna of A. flaviventris 9, from the inside. X 135. 

 From a dried object. 



the tibiæ with a few, small dorsal bristles. Wings somewhat brownish 

 tinged; veins black. Squanmlæ yellow, with a blackish fringe. Halteres 

 yellow. 



Female. Epistoma somewhat broad, grey or whitish grey. Palpi 

 greyish brown. Antennæ considerably shorter than in the male, third 



