NO. 2099. THE DIPTEROUS GENUS SYMPIWROMYIA—ALDRICH. 127 



Hirta. — Femora varying from black to reddish, but always de- 

 cidedly brownish or darker on the basal half. 



Flavipalpis type is about halfway between the two preceding, but 

 the femora are dark, and another specimen from about the type 

 locality has them still darker, hence I place the name provisionally 

 as a synonym of Mrta. 



Montana differs in having infuscated halteres in both sexes; the 

 females of the preceding have yellow halteres. 



SYMPHOROMYIA INURBANA, new species. 



Female. — ^A smallish black species, densely gray pollinose, with 

 yellow palpi, front and middle tibiae and halteres; face bare; third 

 antemial joint concave below arista. 



Front barely as wide as one eye, cinereous, with short, blackish 

 pile; first antennal joint short, small, with short black pile; second 

 half as long as first; tliird black, concave below arista, its vertical 

 diameter almost equal to the whole length of the antenna to base of 

 arista; face bare, cinereous; palpi yellow; broad beyond middle, with 

 whitish hairs; proboscis short, labella fleshy; beard white. 



Mesonotum densely pale ashy pollinose, with mostly pale pile in- 

 cluding that above notopleural suture, vittae very indistinct; pleurae 

 ashy, with pale pile; scutellum ashy with mostly pale pile; halteres 

 wholly light yellow. 



Abdomen wholly black in ground color, densely pollinose, a little 

 more yellow than the thorax; pile mostly pale, not long. 



Femora black, tips yellow; all the coxae and femora with pale pile, 

 base of front tarsi distinctly yellow, others less so. 



Wings almost hyaline with yellowish veins. 



Length, 5.5 mm. 



Seven females : Four from Hailey, Idaho (one of which is the type) ; 

 one each from Webber Lake, California, July 21, 1876 (Osten 

 Sacken); Placer County, California (Doane); and Gallatin County, 

 Montana (Harold Morrison). 



Li the group of species with third joint concave below arista only 

 three are known in the male sex, all of which have the sides of the 

 face pilose; it would appear that the male of tliis species must be' 

 still unknown. The nearest relative known is securifera, which has 

 a strikingly vittate thorax. 



Type. — In the author's collection. 



SYMPHOROMYIA INQUISITOR, new species. 



Male. — Wholly black except the front and middle knees. 



Eyes separated by twice the width of the lower ocellus; frontal 

 triangle almost silvery in certain lights; first antennal joint long and 

 greatly swoUen, cinereous poUinose, and with long, bushy black hair; 



