182 



There appears no tangible difference between specimens from 

 Montana and Colorado as far as can be told from the bad condition 

 of the types of wileyi. The Colorado race was in manuscript and 

 paratypes supplied to Dr. Dyar. The name is now withdrawn. The 

 authors cannot agree with Dr. Dyar that wileyi represents anything 

 distinct from the ordinary Colorado race of cinerea which appears 

 to range from Montana thru the Rocky Mountains into New Mexico ; 

 with a very similar, altho usually slightly smaller form, probably 

 unworthy of a separate name, occuring in Texas. 



Cerura scolopendrina race pluvialis Dyar. 



1922, Dyar, Ins. Insc. Menst., X, 174, scolopendrina s.sp., Cerura. 



Dr. Dyar's types are in such bad condition that they are of little 

 value in comparisons. The Barnes Collection possesses two specimens 

 from Vancouver, B. C, (Blackmore), which appear to match the types 

 of pluvialis. Apparently this form is intermediate in some respects 

 between true scolopendrina and aquilonaris. The name albicovAa 

 Strecker, in the type of which the dark band across the primaries is 

 hour-glass shaped, is as apparently worthy of retention as either 

 pluvialis or aquilonaris. All three names represent very minor devi- 

 ations from scolopendrina, and in a long series from almost any locality 

 all types can be matched. Tentatively, as the general tendency in the 

 Bombycids seems to be to split, the authors would list the described 

 scolopendrina forms as follows : 



C. scolopendrina Bdv., Calif. 



a. — pluvialis Dyar, Ore. and B. C. 



b. — albicoma Stkr., Colo, and Utah. 



c. — aquilonaris Lint., East. States. 



d. — modcsta Hudson, cooler parts of East. States. 



Cerura nivea Neum. 



1891, Neum., Can. Ent., XXIII, 124, Harpyia. 



The type is from St. George, Utah ; and is in the Museum of the 

 Brooklyn Institute of Arts and Sciences. A single female from St. 

 George, Utah, in the Barnes Collection, is a good match for the type ; 

 which is a large, broad-winged, nearly immaculate form; and is, in 

 general, rare in collections. 



