48 THE CANADIAN ENTOMOLOGIST. 



A NEW DIASPII) GENUS. 



BY R. A. COOLEY, AGRICULTURAL COLLEGE, BOZEMAN, MONTANA. 



In Professor T. D. A. Cockerell's " First Supplement to the Check-list 

 of the Coccidc'e " (published in the bulletin of the Illinois State Labora- 

 tory of Natural History, 1899), the following footnote occurs on page 

 398 : " Phenacaspis, Cooley and Ckll., will be a new genus, to include 

 P. fiyssce, C/iinensis, eiigeniiB, etc., hitherto placed in Chionaspis. Mr. 

 Cooley and the present writer agree that these forms have no generic 

 relationship with genuine Chionaspis except through Atilacaspis and 

 Diaspis. I leave Mr. Cooley to publish the generic characters, and classify 

 the species." 



The present paper gives the generic characters of Phenacaspis. 



Phenacaspis, gen. nov., Cooley and Ckll. 



Scale of female elongated, with the exuvige at the anterior extremity, 

 white. Scale of male much smaller than that of female; elongated, with 

 the scales nearly parallel. With two longitudinal grooves on the dorsal 

 surface, causing one or three carinse, which vary in prominence in different 

 species. Pygidium with the terminal pair of lobes more or less sunken 

 into the body, and having their inner edges serrate or crenate, and strongly 

 divergent, leaving a distinct notch on the median line. 



The colour and shape of the scales of the two sexes, together with 

 the median notch of the pygidium, are the essential characters of the 

 genus. 



Since in Professor Cockerell's note nyssce is the first species named, I 

 suggest that this species be considered as the type of the genus. 



CATALOGUE OF THE LEPIDOPTERA OF NORTH AMERICA. 



The new Catalogue of the Lepidoptera of North America which I 

 have prepared has been issued as Bulletin No. 52 of the United States 

 National Museum. It comprises 740 pages. The edition is being dis- 

 tributed by the Smithsonian Institution, without charge. Those not 

 receiving the publications of the National Museum regularly, and who 

 are interested enough in entomology so that this publication would be of 

 practical use to them, will be cheerfully recommended by me to receive a 

 copy, on making application to the undersigned. 



Harrison G. Dvar, Washington, D. C. 



