AMERICAN DIPTERA. 329 



structure of the hind legs readily separate this form from the pre- 

 ceding. 



The collection contains numerous specimens of both sexes taken 

 in Idaho, by Prof. J. M. Aldrich. 



RMPIiaORPHA Coquillett. 

 Same as Empis, except that the face is covered with long bristly 

 hairs; antennal style apical, proboscis directed downward, longer 

 than the height of the head ; third vein forked ; discal cell perfect, 

 sending three veins to the wing margin ; anal cell shorter than the 

 second basal, the vein at its apex nearly parallel with the hind mar- 

 gin of the wing. 



Pile in front of the halteres and on the sides of the abdomen black 2. 



Pile in front of the halteres and on the sides of the abdomen whitish. 



comaiitis Coquillett. 



2. Palpi, proboscis, legs and halteres largely reddish bai'bata Loew. 



Palpi, proboscis, legs and halteres black geneaf is sp. uov. 



Kinpiniorpha barbata Loew (Fig. 106). 

 Empis barbata Loew, Cent, ii, 19. 



, Head black, with long black pile. Eyes large, subcontiguous vniale). First 

 two joints of the black antennae clothed with long black pile. Face bearded 

 with black pile. Palpi large, badious, with black pile. Proboscis very long, 

 much thickened at base. Thoracic dorsum black, opaque, black-pilose, with 

 three cinereous vittse, the median narrow, the outer ones broad. Pleurte black, 

 with cinereous-yellow pollen, bare, except for the bunch of black hairs in front 

 of the halteres. Abdomen black, subshining, opaque, towards the sides with 

 cinereous pollen, and provided with long black hairs. Hypopyginni small, black- 

 pilose, the lower lamellse large, ovate, the middle filament short, awl-shaped. 

 Legs badious, with black hair, the extreme tip of the tibiae and the tarsi black, 

 but the metatarsi, except the apex, and the base of the next few joints badious. 

 Wings long, rather narrow towards the apex, fuscous, the costal cell ferruginous. 

 9 mm. 



California. 



Einpiinorpha geneatis sp. nov. (Fig. 105). 

 Male. Length 6.5 mm. — Black, occiput, pleurte and coxae lightly and finely 

 gray-pollinose. Eyes contiguous above the antennpe ; face, sides of occiput, 

 cheeks, palpi and upper side of the first antennal joint bearing very many long 

 black hairs. Antennfe one-fourth longer than the height of the head, slender, 

 black, first joint equalling one-third the length of the antenna, second joint and 

 style short. Dorsum of thorax black, opaque, with two faint gray vittse ; verv 

 sparingly hairy, a longer bunch of black hairs above the root of the wings; mar- 

 gin of scutellum with about fourteen hairs; a bunch of black hairs present be- 

 tween base of the wings and the halteres. Sides of first three abdominal seg- 



TRANS. AM. ENT. SOC, XXVIII. (42) SEPTEMBER. 1902. 



