THE CANADIAN ENTOMOLOGIST. 85 



NEW SPECIES OF CHIONASPIS AND NOTES ON 

 PREVIOUSLY KNOWN SPECIES. 



BY R. A. COOLEY, B. S., AMHERST, MASS. 



In the Canadian Entomologist, Vol. XXVII., page 33 (1895), 

 Professor T. D. A. Cockerell stated that Dr. James Fletcher had just 

 sent him a species of Chionaspis from Charlottetown, Prince Edward 

 Island — very abundant on the bark o{ Betula papyrifera — and that in 

 comparing it with Prof Comstock's description of C. Lintneri he 

 believed it to be that species. Following the description of the Prince 

 Edward Island specimens, Prof Cockerell drew attention to a few 

 probable points of difference between it and Prof. Comstock's description, 

 but as he could find no positive differences he did not separate the form 

 on Betula. inferring that the discrepancy was due either to variation in 

 his specimens or the incompleteness of Prof. Comstock's description. I 

 have since received specimens of the form on Betula papyi-ifera from 

 Prof Comstock and Dr. J. A. Lintner, and the latter gentleman has also 

 lent me Prof. Comstock's co-types of C. Lintneri. On comparing the 

 two I was at once convinced that they were distinct, and upon giving 

 Prof. Cockerell my reasons for thinking that the two insects could not be 

 identical, he advised me to separate the form on Betula. 



While the insect is distinct from Lintneri, Comst., I believe it to be 

 only a variety of that species, and have described it as such below. 

 Chionaspis Lintneri betula, n. var. 



Scale of Female. — Widely pyriform, flat, covered with the very thin 

 epidermis of the bark, giving a brownish tinge to the snow-white scale. 

 Exuviae bright orange-brown, contrasting strongly with the secreted 

 portion. Texture of scale compact. Length of exuviae about .8 mm.; 

 total length of the scale about 2 mm. 



Compared with typical Lintneri, the variety is .5 to i mm. shorter, 

 proportionately broader, firmer in texture, with the exuviae orange-brown 

 instead of yellowish-brown. 



Scale of Male. — Of the normal form and colour of the genus, with a 

 distinct but feeble median keel and pale yellow exuviae. Length about 

 .8 mm. 



Unfortunately I have no typical male scales of Lintneri with which 

 to compare those of this variety. 



Female. — Elongated, with the segmentation moderately distinct. 



