THE CANADIAN ENTOMOLOGIST. 199 



Also undetermined Colpocephali from Scops asio, Junco hy emails, Bubo 

 virglnlanus, Melanerpes crythrocephahts, and a duck. 



NITZSCHIA. 



N. pulicarc N. On Chcetura pelasgia. Abundant on every bird of 

 this species that I have examined. The eggs were always found attached 

 to the feathers on the back of the head, and on no other pairt of the body. 

 Apparently no difference between these and those on Cypselus apus in 

 Europe. 



TRINOTON. 



T. lurldum. On Anas boschas. Occurs in Europe on many species 

 of ducks. 



PEDICULID^. 



Pediculus capitis and vestimentl and Phthirlus inguinalis naturally 

 present no variations. 



HAEMATOPINUS. 



H. piliferus. On dog. Has not been found common. 



H. eiirystcrnus. On cattle. Common, and without any noticeable 

 variation. A related species, though quite different, has also been secured 

 from cattle, but as yet not harmonized with any European species. 



H. acantJiopus. On Arvicola. Agrees closely with European. 



Specimens of undetermined Haematoplnl presenting very marked 

 characters, have been taken from five different species of Rodentia, the 

 specimens from one of these (Geomys bursarlus) differing so greatly as 

 to necessitate a revision of the generic characters, or else the forming of 

 a new genus. 



The author desires to make a careful study of these groups, and would 

 be very glad to obtain specimens. 



ENTOMOLOGICAL NOTES. 



BY DR. P. R. HOY, RACINE, WIS. 



Racine, Wis., is situated on the west shore of Lake Michigan, at the 

 southern extremity of the heavily timbered district, where the great prairies 

 approach near the lake from the west. Latitude, 42° 46" N.; longitude, 

 87° 48" W. 



