32 Le Conte’s Monography of E 
while the young of the true plagyrus bear a close resemblance - 
to the old. This last species is found in every spring, run and 
rivulet in Ohio, and the former I have never met with except . 
in the waters of the lake, where it is frequently taken in seines 
while fishing for other species. It affords me pleasure to, ded- - 
icate it to my friend D. Humphreys Storer, M. D., to whom I 
am indebted for essential aid, and many important suggestions, 
in arranging and describing our western fishes. 
Art. HI. —A MONOGRAPHY OF THE NORTH AMERICAN HISTE- | 
ROIDES. By Jonn Le Contes, F. L. 8.; &c. Mur ee g Sept. 10, 1844. 
Tue little attention which has been paid to Entomology in | 
this country, has left the greater portion of our insects entirely - 
unknown ; and we are chiefly indebted to foreigners, for Xx | 
names and descriptions of those with which we are acquainted. — 
The difficulty of ascertaining even these is justly much com- 
plained of ; for nowhere can be found collected together the - 
various works through which they are scattered. In order, as 
ographies of such genera of Coleoptera as may appear molti 
worthy of investigation. Those which contain the greatest 
number of new species, may not always prove the most so; 
therefore, in selecting the family of the Histeroides for the first 
of the series, although the greater part of the species ha 
been long known, it is hoped that it will not prove one of the 
least interesting. 
In the year 1811, when Baron Paykull published his Mo ) 
ocnaPHiA HisrERorpuM, he was able to describe but nin 
& species, of which, he considered about fourteen 
natives of North America. Twenty-six years af 
Count Paiste. in hi 
