192 THE CANADIAN ENTOMOLOGIST. 



Vertex flat, slightly obtusely angled, one-third wider than the middle 

 length, over three-fourths the length of the pronotum, face and facial 

 angle as in signati/rons ; pronotum shorter, over twice wider than long ; 

 elytra equalling the abdomen in the female, slightly longer in the male, 

 shorter than in signati/rons, with a very slight appendix, venation as in 

 cruciatus. 



Colour : vertex with the margins, a median stripe and a short trans- 

 verse bar before the middle always light, the remainder of the disc with a 

 very variable amount of fuscous, fading out posteriorly into a rust brown; 

 pronotum irregularly marked with rust brown — in the darker specimens 

 arranged in longitudinal stripes ; elytra pale, subhyaline, the nervures 

 white, a broad, slightly oblique band across the middle, another before 

 the tip, and spots on the margins of the second and third apical cells 

 fuscous. 



Genitalia : female, ultimate ventral segment short, the lateral angles 

 acute, posterior margin roundingly emarginate either side of a large, 

 acutely pointed, black tooth, which is cleft nearly to its base ; either side 

 of this tooth the oblique finger-like plates are exposed ; male valve 

 obtusely angulate, longer than the ultimate segment, plates broad at base, 

 slightly narrowing to the truncate tips, where they are two-lhirds the 

 basal width, two and one-half times the length of the valve, set obliquely 

 together, forming a trough. 



Described from numerous specimens swept from the meadows of 

 the Little Beaver, in the mountains west of Fort Collins, Colq. 



CTENUCHA CRESSONANA. 



In the recent volume published by the British Museum (Natural 

 History), Sir Geo. Hampson refers this species, described by me in 1863, 

 as the same with C. venosa. The material in the British Museum from 

 North America : Texas, Grote and Zeller collections, is all C. venosa. 

 C. Cressonana, from Colorado, is clearly distinct, a larger species more 

 of the type of C. virginica, and I can only suppose that unacquaintance 

 with my type has led to the present lumping. I may also add, that it 

 can hardly be settled in the British Museum, whether the Californian 

 Scepsis Fackardi, which has lighter tinted primaries, and greater exten- 

 sion of a paler yellow on the head, be a local race oi S. fulvicollis or not. 

 From analogy in the group, it will probably prove distinct. 



Roemer Museum, Hildesheim, Germany. A. Radcliffe Grote. 



