Harris on the genus Cychrus. 189 
In E. salmonàcea, the lateral ones arise from and ap- 
pear like a prolongation of the fleshy lips, instead of 
being placed near the neck, and the superior ones are 
long, somewhat compressed, and, as it were, serrated at 
the edges ; while in E. divérsa, they are short, smooth 
and round. The genitalia also are situated much farther 
forward in this species. than in any other I have pre- 
viously examined. See plate 1, f. 1 to 5, of this Journal 
for other distinctive marks. 
ART. VIII .—REMARKS UPON THE NORTH AMERICAN 
INSECTS BELONGING TO THE GENUS CYCHRUS OF 
FABRICIUS; WITH DESCRIPTIONS OF SOME NEWLY 
DETECTED SPECIES. By Tuappxus Wirrraw Hanns, M. D., 
Librarian o ONPE en censes 1838. . 
"nin in the course of the past year, zo didakes 
to revise some of the American insects in our collec- - 
tions, I have detected several errors in the generical 
characters as laid down in the books, and have found 
it necessary to separate certain species which, hereto- 
fore, have been confounded with described insects, and 
have, furthermore, discovered some mistakes into which 
I have, myself, fallen and led others, for the want of 
specimens for comparison. 
I am not at all disposed to be captious in my auda 
upon the distinguished naturalists, whose works form 
the standards in. entomological science; I do not wish 
to be forward in obtruding my own discoveries; nor am 
I at all actuated by the vain-glory of indicating, naming, 
or describing new species, whether necessary or not; 
