AiiT. Hi. NORTH AMERICAN SCELLUS GREENE. 17 



is looked upon in a very oblique direction, a green or at least brassy - 

 yellow color. The tapelike anal appendages are veiy long, somewhat 

 blackened at the basis, and still more so at the tip which is turned 

 upward and there beset with a small tuft of blackish hair directed 

 backward; otherwise their margins are not hairy, although there 

 is a single black bristle where the blackening of the tip begins on the 

 under side in the vicinity of its inner margin. Near the anus be- 

 tween the above-mentioned two appendages there are a few small 

 black hairs. Coxae greenish-black, with Avhite-yellowish dust; the 

 foremost have, besides some pale hairs, almost imperceptible on ac- 

 count of their shortness and delicacy, a few black bristles before and 

 upon the tip. Feet black with a metallic-green reflection, which 

 gradually disappears upon the last joints of the tarsi. Fore femora 

 toward their root not so much thickened as in the two preceding 

 species, beset with strong black bristles of different lengths on the 

 under side, on the front side with a sparse row of short black 

 bristles. Middle and hind femora long, slender, straight, of a plain 

 structure, beset on the second half with a moderate number of short, 

 scattered black bristles. The moderately stout fore tibiae bear on 

 their anterior side, not far from the basis, a short black thorn and 

 are prolonged at their tip into a large, somewhat clumsy but sharp 

 tooth, before which the under side of the tibia, provided with bristles, 

 has a very small excision. The middle tibiae are long and slender; 

 on the upper side they are beset with only three, on the anterior side 

 with about seven scattered bristles of very moderate length; on the 

 other half of their hind side they bear long curly black hairs. Hind 

 tibiae slender, straight, rather long, only on the second half with a 

 few isolated black bristles; the bristles on the outside of their tips 

 are also only short. Tarsi plain, their joints of decreasing length; 

 the first joint of the fore and middle tarsi on the under side with 

 numerous black bristles, the first joint of the hind tarsi only with a 

 few and much shorter bristles. Wings hyaline-gra}'^, somewhat 

 darker toward the tip on account of the gray margin of the second, 

 third, and fourth longitudinal veins; upon the posterior transverse 

 vein and upon the middle of the last segment of the fourth longitudi- 

 nal vein there is a gray-blackish spot of considerable size." 



Hahitat. — Fort Resolution, Hudson Bay Territory (Kennicott). 



Type locality. — Fort Resolution, Hudson Bay Territory (Kenni- 

 cott) . 



Distribution. — Hunter's Creek, Wyoming, September 11, 1895. 

 Tennessee Pass, Colorado, July 24, 1917, J. M. Aldrich, collector. 

 Colo. 2009 U.S.N.M. Cumbers, New Mexico, August 14, 1901, 10,000 

 feet altitude, Dyar and Caudell, collectors. Hunter's Creek, Wyo- 

 ming, September 11, 1895, Colo. 2009 (A. L. M.). High River, 

 Alberta, Owen Bryant, collector (C. W. J.). 



