March, 1917-] CoLE : OsTEN SaCKEn's GrOUP " PcECILANTHEAX." 73 



sides of the first two segments are beset with yellowish white pile ; the sides 

 of the following segments, beginning with the end of the second, with black, 

 mixed with fulvous pile, the black forming tufts on the hind margins of the 

 segments ; the same black pile is scattered over the surface of the abdomen, 

 above the tomentum. Venter : segments 2 to 4 reddish, more or less black 

 at the base ; the following segments black, with a reddish posterior margin. 

 Legs red with a golden yellow tomentum and black spines ; front femora black 

 at the base ; tips of the tibiae and all the tarsi black. Wings tinged with 

 blackish brown ; in the apical half, the following spaces are grayish hyaline : a 

 spot in the expanded end of the marginal cell, the end of the first submarginal 

 and nearly the whole second submarginal cell, a streak in the end of the first 

 posterior cell, the three other posterior cells, and the latter half of the discal 

 cell ; the veins traversing these subhyaline spaces are clouded with brown. The 

 cross vein bisecting the second submarginal cell is placed in its narrow part, 

 so as to form with the adjacent veins the figure ' A.' 



"Habitat. — Cheyenne, Wyo., where I found it to be quite com- 

 mon, Aug. 21, 1876. Five specimens. 



" Six specimens from near Webber Lake, Sierra Nevada (July 

 25), agree in all respects with those from Cheyenne; but they are a 

 little smaller, the coloring is a little darker, both on the wings and 

 on the body; the pile on the chest and pleurae is less white; the to- 

 mentum on the abdomen above is the same, but the fulvous prevails 

 over the gray, and the black spots in the middle of each segment are 

 larger, on the second segment, along the hind margin,- the black forms 

 a cross band; attenuated on each side, and not reaching the lateral 

 margin ; the same is repeated on each following segment, the black 

 spot rapidly diminishing in extent. The venter is reddish without 

 any black at the base of the segments. The portion of the anterior 

 branch of the third vein beyond the supernumerary cross-vein is very 

 distinctly clouded with brown in these specimens while it is not 

 clouded at all or only imperceptibly in the specimens from Cheyenne. 

 I hold this to be merely a local variety of alpha." 



Coquillett redescribed alpha in the Trans, of the Amer. Ent. Soc, 

 XIV, p. 180, and evidently from specimens of another species. The 

 second joint of the antennae is not red as he says and the wings are 

 not yellowish brown. Alpha does not have the " sides of the abdomen 

 sometimes partly or wholly reddish." He makes no mention in his 

 description of the fact that the bases of the fore femora are black.' 



I have five specimens, from the following localities : Colorado (2 

 specimens, one from Rocky Ford); Summit, Sierra Nev., Cal. ; Wy- 



