AMERICAN DIPTERA. 261 



BL.KPIIAIt<>PRO€TA Loew. 

 Insects resembling Brachystoma in everything but the noninfla- 

 tion of the abdoineti and the neuration of the wing. In this genus 

 the first subinarginal cell is squarely cut off by a cross-vein connect- 

 ing the second and the third longitudinal veins. 



The three basal cells subeqiial 2 



Second hasal and anal cells lon^ biimninnijs Jjoew, 



2. Base of anterior tarsi fuscous, of middle tarsi badius M<'rratiil» I^oew. 



Anterior and middle tarsi black iligriinaiiii Loew. 



Klepharoprocta iii^riinaiia Loew. 

 Cent, ii, 17. 



Head black, shining. AnteiinjK black. Face very narrow, white-pollinose. 



Proboscis pale yellow. Thorax l)lack, shining, bare, the lower half of the pleuree 



white-pollinose. Scutellum and abdomen black; venter yellow. Hypopygium 



subglobose, black, apically with some erect pile pale yellowish. Coxa; and legs 



slender, yellowish. Anterior femora below near the apex with small black 



spines; middle femora not thicker than the others, pure yellow ; posterior femora 



fuscous, except the base and very. apex. Anterior tibise increasing in yellow 



color towards the ajiex. posterior fuscous, pale below near the apex. Anterior 



tarsi black, po.sterlor dark fuscous, black at tip. Wings cinerascent, narrow, 



stigma obsolete, hairs of the hind margin not bent back ; first submarginal cell 



closed ; the three basal cells subequal. 2.7 mm. 



Illinois (Le Baron). 



Ble|>liaro|>rocta biiiuniiiiiiN Loew (Figs. 91, 02). 

 Cent, ii, 16. 



Head black, shining. First two joints of the antennse pale yellowish, third 

 joint black, the terminal seta black. Face very narrow, white-pollinose. Pro- 

 boscis pale yellow. Thorax blac^k, shining, bare, hind angles dark fuscous, lower 

 half of the pleurse white-pollinose. Scutellum black; abdomen black, shining, 

 bare; venter yellowish; hypopygium globose, black, a])ically provided with a 

 bundle of pale yellow hairs. Coxaj and legs slender, pale yellow. Anterior 

 femora below near the apex with very small black spines; middle femora a little 

 thicker than the others, curved, below near the base with rather spar.se white 

 hairs, behind — before the apex — with very closely-placed hairs; hind femora 

 more slender on the outer half, infuscated. Anterior tibia; simple, basal half of 

 the middle tibiie subfuscous, at the apex suddenly thickened and provided with 

 long pale yellowish hairs; po.sterior tibiaj curved, fuscous, the extreme apex 

 paler. The first three joints of the front tar.si decreasing in length, yellow, the 

 last two black, dilated, on both sides short black-jjilose, each with a silvery dot 

 below, the outer one larger; of the middle tarsi the first three joints are yellow, 

 the last two black ; the hind tarsi have the last joint black, the next to the last 

 dark fuscous, and the others yellow. Halteres white. Wings long, narrow, 

 wedge-shaped, subcinerascent, stigma obsolete, posterior margin with long re- 

 flexed hairs in part; first submarginal cell closed; the two anterior basal cells 

 much shorter than the anal. 3 mm. 



District of Colu(ni)ia. 



TKAN8. AM. ENT. SOC, XXVIII. AUGUST, 1902 



