AET. 23 TWO- WINGED DOLICHOPODID FLIES VAN DUZEE 21 



All coxae and femora black; fore and middle coxae with long- 

 black hair; fore femora with long black hair on the posterior and 

 lower surfaces; middle pair with long black hair below, which is as 

 long as their width. All tibiae and basitarsi yellow, all tarsi black 

 from the extreme tip of first joint; joints of fore tarsi as 50-14-10- 

 9-7; of middle tarsi as 56-25-15-8-10; joints of posterior pair as 

 44-35-22-15-8. Calypters whitish with black tips and cilia. Hal- 

 teres yellow. 



Wings grayish; third vein bent backward at tip, parallel with 

 fourth beyond the bend in the last section of the latter; last section 

 of fifth vein nearly one and three-fourths times as long as the cross- 

 vein and fully as long as from the crossvein to the bend of the 

 fourth, which is quite abrupt. 



Female. — Front and face wide, thickly covered with grayish yel- 

 low pollen, the latter with the suture far down so that the lower 

 portion is scarcely half as long as wide; arista apical. Coxae and 

 their hairs wholly black ; femora and tibiae yelloAv ; fore and middle 

 femora a little darkened at base, the former also blackened on upper 

 surface; hind femora slightly blackened above at tip. Hind tibiae 

 wholly yellow; fore and middle tarsi black from the tip of first 

 joint; first joint of hind tarsi yellowish-brown. Cilia of the calyp- 

 ters long and black. Hairs on the surface of the scutellum conspicu- 

 ous, but not as long as in the male. 



Described from one pair taken by C. H. Curran at Hull, Quebec, 

 June 4, 1923. 



Type and allotype. — In Canadian National Collection. 



16. ARGTRA SPLENDIDA. new species 



Male. — Length, 5 mm. Face and front silvery white, the former 

 rather narrow; palpi and proboscis black with black hairs. An- 

 tennae black; first joint with conspicuous hairs above; third joint as 

 long as the first two taken together, obtusely pointed at tip; arista 

 above the point, a little longer than the antenna. The minute, black, 

 orbital cilia descend to the middle of the eye ; below them the beard 

 is white or yellowish-white, and quite abundant. 



Dorsum of the thorax green with brown reflections and a violet 

 stripe on each side of the long acrostichal bristles; these stripes do 

 not reach either the front of the thorax or the scutellum ; the dorsum 

 dulled with gray pollen, which is most abundant on the anterior half 

 and on the violet stripes; the pollen on the sides is more silvery 

 white ; scutellum with two pairs of marginal bristles, outer pair not 

 more than half as long as the median ones; there are several small, 

 pale hairs above the fore coxae; pleurae black with white pollen. 

 Abdomen black, wholly covered with silvery white pollen ; there are 

 large yellow spots on the sides of the second and third segments and 

 9123—25 4 



