AMERICAN DIPTERA. 293 



Male. — Head black, occiput cinerascent. Eyes contiguous along the front. 

 AntenniB black, moderate, third joint acuminate, the terminal style rather long. 

 Palpi black. Proboscis badions, exceeding twice the length of the head, labium 

 deeply bipartite. Thorax and scutellum black cinereous, black-pilose. Abdo- 

 men dark brown, moderately shining, black -pilose ; hypopygium rather large, 

 subglobose, closed, the upper lamellte short, dark badious, the central filament 

 hidden. Cosse piceous. Femora pale testaceous, at the very apex spotted with 

 a black dot; the anterior tibite testaceous at base, piceous towards apex; hiud 

 tibise piceous, the base, however, testaceous ; tarsi piceous, the very base of each 

 joint testaceous ; the whole of the legs clothed with long black hair. Knob of 

 halteres infuscated. Wings pale fuscous, the veins a little more dusky fuscous, 

 the apex of the second longitudinal vein recurved, the anterior branch of the 

 third vein ascending perpendicularly, the fourth vein abbreviated and furcate by 

 an adventitious branch below before the apex ; stigma oval, fuscous; the cross- 

 veins, the adventitious branch of the fourth vein, and the costa between the 

 branches of the third vein bordered with fuscous; discal cell broad. 4.2 mm. 



Mexico. 



Empis clausa Coquillett (Fig. 129). 

 Proc. Nat. Mus., 1895, p. 401. 



Male. — Head black, subshining, eyes contiguous, upper facets larger than the 

 lower ones; antennse black, the third joint quite short, rather broad at the base; 

 style two-thirds as long as the third joint; proboscis two and one-half to four 

 times as long as the height of the head, palpi brown. Thorax, pleura and scu- 

 tellum black, opaque, gray polhnose, pile in front of the halteres black ; scutel- 

 lum beariug two bristles. Abdomen black, subshining, towards the base more or 

 less tinged with yellow, its pile black; hypopygium very small, porrect ; fila- 

 ment slender, yellow, hidden, except on the basal half. Legs slender, simple, 

 the middle and hind femora and all the tibi« furnished with much very long 

 black pile ; coxse yellow, the hind ones brown ; femora yellow, the hind ones, ex- 

 cept at base, blackish ; tibite and tarsi blackish, extreme base of each tibia yel- 

 lowish ; hind tibiae greatly dilated towards the tip, bowing inwardly at the mid- 

 dle; front metatarsi nearly twice as thick as the middle ones, hind metatarsi 

 nearly as thick and slightly longer than the front ones. Knob of halteres black- 

 ish. Wings hyaline, stigma and a front border to the anterior branch of the third 

 vein and on the small and posterior cross-veins dark brown ; veins brown, fourth 

 vein obliterated before reaching the wing margin, anterior branch of the third 

 vein usually ending in the second vein, closing the first submarginal cell ; con- 

 tact of discal and fourth posterior cells much longer than that of the third and 

 fourth posterior cells. 



Female. — Differs from the male in that the legs are wholly brown, compressed, 

 and that the upper and under sides of all the femora, outer and inner sides of all 

 the tibise, and the upper sides of the front and hind metatarsi ciliate with long, 

 nearly erect scales. Base of abdomen never winged with yellow. 4 mm. 



Illinois (Robertson). 



This species is common throughout the western part of the 

 United States. 



At first reading this may seem to be the same as E. sjnloptera, 



TRANS. AM. ENT. SOC, XXVIII. AUGUST, 1902. 



