NO. 2099. THE DIPTEROUS GENU 8 SYMPHOROMYIA—ALDRICH. 119 



15. Femora blackish (Pennsylvania to California., etc.— flavipalpis Adams). 



hirta Johnson. 

 Femora yellow 16. 



16. Pile of front and of mesonotum coarse and long, black (Colorado), .fulvipes Bigot. 

 Pile of front short, black, that of mesonotum largely white (New Jersey). 



cinerea Johnson. 



SYMPHOROMYIA ATRIPES Bigot. 



Symphoroviyia afripes Bigot, Bull. Soc. Zool. France, vol. 12, 1887, p. 15, female. 

 Mount Hood, Oregon. 



Male. — Wliolly black except the knees, which are narrowly red, 

 and the stems of the halteres, which are yellowish-brown; moder- 

 ately shining on thorax and abdomen, the mesonotum a little less so, 

 inclining to velvety on the middle, unstriped; first antennal joint 

 greatly swoUen. 



Eyes not quite contiguous, vertical triangle with moderate black 

 pile, frontal one bare, black; first antennal joint long and greatly 

 thickened, especially bulging below, with dense, long black pile aJl 

 round; the second and third joints wanting in the specimen; face 

 bare, black; palpi large, prominent, and densely bushy black pilose; 

 proboscis short, labella fleshy. In a slanting transmitted light there 

 is a reddish tinge to the apical part of the hairs in the beard, and 

 those on the palpi and the underside of the antenna. 



Thorax seemingly not at all vittate, the pile blackish; hypopleura 

 with tuft of pale pile. Abdomen with pale loose pile on sides near 

 base. Femora and tibiae rather shining. Wings slightly tinged 

 with brown, the base yeUow. 



Female. — Black, including antennae, palpi, halteres except the 

 stalk, legs, and tarsi; moderately cinereous pollinose except the sec- 

 ond, third, and fourth abdominal segments and the femora and tibiae, 

 which are shining. Front black, cinereous opaque, very wide above 

 on account of the compound eyes being nearly globular in shape, pile 

 of front short, sparse, black; antennae rather short, first joint hardly 

 longer than the two following together, opaque, with short black hair 

 all round, not much thickened; second small, black; third intensely 

 black, a little deeper vertically than long, slightly prominent below 

 the arista, the depth not much greater than that of the first joint, 

 arista stout, short; palpi short, thick beyond the middle, black, bare 

 above, with black hairs below; labella black; proboscis projecting 

 diagonally downward, about as long as the face; the face cinereous, 

 not appreciably yellow along the lower border; occiput a little pro- 

 tuberant, with black hairs above, yellow on the middle and lower 

 part, the last long. Thorax cinereous opaque, with a wide double 

 stripe nearly black on the middle of the mesonotum and wide single 

 stripe each side abbreviated in front and interrupted at the suture; 

 scutellum cinereous; hairs of thoracic dorsum black, sparse, and rather 

 small; pleura thinly pollinose, subshining, almost bare, the meta- 



