THE CANADIAN ENTOMOLOGIST 391 



first joint being longer than the remaining four together, and 

 ciliate with long bristles above; the second joint with a long and 

 the third joint with a short bristle at tip ; middle tibia with three long 

 bristles of increasing length above, and a long bristle-like spur at 

 tip, also several small bristles; middle tarsi about one-and-one- 

 fourth times as long as their tibiae and ciliate above with close-set 

 bristle-like hairs, which decrease in length but extend to the ex- 

 treme tip of the fourth joint; fifth joint with minute white hairs 

 above; hind tibiae without bristles, but with a row of short hairs 

 along the lower inner edge. Tegulae and their cilia black; halters 

 black, with a pale yellow knob. Wings grayish hyaline, with a 

 brown cloud near the tip in front of the third vein. 



Described from one male taken at Philadelphia, Pa. Type in 

 the Cornell University collection. 



The formation of the hypopygium and its appendages is much 

 like that of S. forcipatus Aid., but the arrangement of the bristles 

 of the legs is quite different and easily separate the species. 



Sciapus digitatus, n. sp. 



Male — Length 5 mm. Face and front green, the former with 

 rather thick white pollen when viewed from in front, this pollen 

 extending a little on to the lower part of the front; antennae small, 

 black, the longest bristles on the second joint a little longer than 

 the antennae; arista about as long as the width of the head; palpi 

 and proboscis brown. Thorax green with very little pollen. Abdo- 

 men green, with black bands at the base of the segments, those on 

 the last two segments occupying nearly the whole of the segments; 

 hypopygium small with two small, slender, nearly straight appen- 

 dages, which are black and about as long as the width of the 

 hypopygium. Coxae and femora black, the tips of the latter yellow ; 

 fore and middle tibiae yellow; hind tibiae yellowish brown with 

 black tips; fore tarsi brownish almost from the base; middle and 

 hind tarsi black; fore femora with delicate white hairs and a few 

 black bristles below; fore tibiae with about four long black bristles 

 on the lower hind edge; fore tarsi about twice the length of their 

 tibiae, the metatarsi slightly longer than the tibiae and with two 

 bristles below; middle and hind femora with white hairs below; 

 middle tibiae with several small scattered bristles; hind tibiae with 

 only very short bristles, which are hardly distinguishable from the 



