106 NEW YORK STATE MUSEUM 



sinuous course usually so marked in Erem. macrurus. The 

 form of the third discoidal cell in the type was a little more regu- 

 lar than in our specimens and the first and second recurrent ner- 

 vures were more nearly of an equal length. The wings of E r e m. 

 a r c t i a e appear to be proportionately wider than in Erem. 

 macrurus. In a study of examples of Erem. macrurus, 

 I find the claws pectinate as well as in Erem. arctiae. The 

 claspers of the male in the former species are rather long, sub- 

 rectangular and obtusely rounded at tip, while in the latter they 

 are subtriangular and acutely rounded at tip. 



Distribution. This species is probably as widely distributed 

 over this county as is Erem. macrurus. It is known to 

 occur in New York, New Jersey, District of Columbia, Alabama, 

 Mississippi and California, and specimens are before the writer 

 from the following localities : Ottawa, Canada [Harrington] ; 

 Maiden and Amherst Mass. [Fernald] ; Michigan, Onaga Kan., 

 Santa Cruz mountains and bred from Halisidota a g a s - 

 s i z i i by Coquillett, Los Angeles Cal. [U. S. Nat. Mus.] There 

 is a specimen from Pennsylvania and one from Texas in the 

 Museum of Comparative Zoology, Cambridge Mass. 



Bibliography 



1890 Riley, C. V. & Howard, L. 0. Insect Life, 3:155 (Bred from Isia 



Isabella, Ecpantheria deflorata, Automeris io 

 from Cal., as O. arctiae Riley M. S.) 



1891 Lintner, J. A. Ins. N. Y. 7th Rep't, p.228 ( Bred from I s i a isa- 



bella, as O. arctiae Riley M. S. ) 

 1896 Ashmead, W. H. Am. Ent. Soc. Trans. 23:192 (Original descrip- 

 tion) 



Eremotylus glabratus Say 



This species is apparently quite closely related to Erem. 

 arctiae Ashm. and it is possible that this latter is a synonym 

 of Say's species but that can be determined with certainty only 

 by examining the type, which is apparently not in existence. A 

 small example of Erem. arctiae corresponds very well 

 indeed with the original description of this rare form. There is a 

 cocoon in the Harris collection in the rooms of the Boston Society 

 of Natural History, labeled " O p h i o n glabratum" but no 



