XXXI, '20J ENTOMOLOGICAL NEWS 273 



quire further investigation, especially the determination of 

 the limits of variation within the species, and there are some 

 synonymic adjustments to be expected, as in the case under 

 consideration. Through the kindness of Professor Drake 

 I have had for study a long series of C. betulae Drake, 3 and 

 I find that it is identical with C. cyrta Parsh., as we have 

 suspected for some time. The latter was described from a 

 considerable number of specimens, collected in various parts 

 of New England where birch is abundant, but none of them 

 bore a food-plant label, and the former has been found in 

 Maine as well as in New York. The lack of data in the case 

 of one series, together with a moderate degree of variability 

 characteristic of the species, should probably be held account- 

 able for the original failure to appreciate the relationship 

 involved. 



Corythucha salicis Osborn & Drake. 4 



Through the kindness of Mr. W. Downes I have recently 

 received a long series of this species collected on Salix, at 

 Vernon, and at Mission, British Columbia. Comparison of 

 this new material with specimens of salicis O. & D. from the 

 type locality in Massachusetts and with the type specimens 

 of canadensis Parsh. shows conclusively that the latter cannot 

 be maintained as a distinct species and must stand as a syn- 

 onym of salicis. In this species the hood is always at least 

 twice as high as the median carina, according to my obser- 

 vations, and hence the species is not correctly located in 

 Gibson's key. The markings vary considerably in distinct- 

 ness. Mr. R. F. Hussey has sent me specimens of salicis 

 which he collected in Michigan and the species is now known 

 to occur across the northern part of the continent from 

 Maine to British Columbia. How far its range extends 

 southward has not been determined, but there is a Florida 

 record, which, I believe, requires confirmation. The dis- 



., pp. 86-87. 



4 C. salicis Osborn & Drake, Ohio Jour. Sci. XVII: 298, 1917. 

 C. salicis Gibson, Trans, Am. Ent. Soc., XLIV: 85, 1918. 

 C. canadensis Parshley, Occas. Papers Mus. Zool. Univ. Mich., No. 

 71: 18, 1919- 



