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THE CANADIAN ENTOMOLOGIST 



hairs. Halters yellow, the stem infuscated; tegulae and their cilia 

 black. Wings hyaline, with the usual cross bands, which are 

 united on the front as far back as the third vein; the last bend in 

 the fourth vein nearly a right angle and little rounded. 



Females with yellow femora. 



Described from two males and two females from Cuba. 



This is very close to S. breviseta Coq., differing in having 

 longer bristles on the second joint of the antennae, smaller lamellae 

 to the hypopygium and having the middle tarsi entirely black. 



Sciapus nigrimanus, n. sp. 



Male — Length 7 mm. Face green, more bluish on the upper 

 part, white pollinose when viewed from above; front violet with the 

 orbits narrowly green near the vertex. Antennae small, black 

 with short bristles on the second joint; arista about as long as the 

 width of the head. Thorax green, white pollinose along the front 

 and sides of the dorsum when viewed from above; pleurae more 

 blackish, with white pollen; scutellum blue-green. Abdomen 

 green, with black bauds at the incisures, that on the second seg- 

 ment extending forward on the centre of the dorsum to the base of 

 the abdomen; hypopygium large with large, somewhat forked, 

 black lamellae. Coxae black with white pollen; tips of the fore 

 coxae yellow; fore and middle coxae with rather long, delicate white 

 hairs on the front surface; hind coxae with several pale hairs and 

 the usual black bristle on the outer surface; femora green, fore and 

 middle pairs broadly, and the hind pair narrowly yellow at the 

 tips, all with delicate pale hairs below, those on the hind pair 

 longest; tibiae yellow, tips of the hind pair black; fore tibiae with 

 about six slender bristles below and one above near the apex ; 

 middle tibiae with a row of about twelve stouter bristles on the 

 lower front edge, three on the upper side, and three or four small 

 ones on the posterior surface; hind tibiae with one bristle at basal 

 fourth; front tarsi black from the tip of the first joint, about one- 

 and-two-thirds times as long as their tibiae; the metatarsi nearly 

 as long as the tibiae, and with a row of bristles below extending the 

 entire length; second joint short, about twice as long as wide with 

 delicate hairs below, a little widened downward ; third joint slightly 

 shorter than the second; fourth joint nearly as long as the two 

 preceding together; fifth joint about as long as the third; middle 



