162 THE CANADIAN ENTOMOLOGIST. 



found till last year, when they began to be numerous again, and are more 

 abundant this year. 



C. Amasia, A.-S. Van Virens, n. var. — This differs from the usual 

 form in having more clear white for the ground color, very few brown 

 scales in the median space below the median vein, the costal brown patch 

 inside the t. a. line mixed with olive, a similar patch on the hind or inner 

 margin, with traces only of brown and olive between. In the usual form 

 this forms a continuous shade across the wing. The subterminal shade 

 has only traces of brown in its anterior part, while the rest of the way the 

 brown is pale. But the principal feature is an olive green shading that 

 accompanies nearly all the black markings and forms shades below the 

 forks of the median vein, and shades the terminal space. Described from 

 one ^ , but it does not seem to be a sexual variation. I have males and 

 females without these characters, as well as intergrades. 



In the 1 6th Report of the Ontario Ent. Soc. , Mr. Bowles quotes me as 

 whipping trees and taking the Catocalae that fly up in a net. They should 

 be taken by placing the mouth of the poison bottle over them when they 

 settle on the same or another tree. Taking in a net spoils them. While 

 on this subject, I might add that I seldom capture females on trees in 

 the afternoon, while half of those taken at sugar are likely to be females. 

 Can any one say where the females are during the day time ? 



It is generally understood that Catocalae are to be found on trees in 

 the afternoons if the wind blows from the south or southwest. I find 

 that during extreme dry weather the direction of the wind makes little or 

 no difference. 



ON THE GEOGRAPHICAL DISTRIBUTION OF NORTH 

 AMERICAN LEPIDOPTERA. 



BY AUG. R. GROTE, A. M. 



In the preparation of the present paper I have used articles by myself 

 which have appeared in the " Popular Science Monthly," in the pages of 

 " Silliman's Journal," and elsewhere. I have also noticed what has been 

 printed bearing on the subject by other writers. I have tried to present 

 the whole subject as it now appears to me, at the risk of repeating myself 

 in part. This seemed at times excusable if not unavoidable, but as it is 



