NORTH AMERICAN COLEOPTERA. 
47 
tendency to form transverse strigae ; elytra with rarely a trace of a costa near 
the suture, the surface scabrous, with a tendency to form transverse strigae to a 
slight extent, the oblique portion of the margin serrate; body beneath more 
shining than above, punctate and transversely strigose. prosternum more coarsely 
punctate; anterior femora toothed at outer third. Length 12 — 17 mm. ; .48 — .68 
inch. 
In both sexes the last ventral is truncate, squarely in the 9 > 
slightly eniarginate S . The anterior tibite are serrate in the male 
very distinctly, but in the female this is but faintly indicated. 
This insect has been a long time in my cabinet, but I refrained 
from naming it, hoj)ing that it was a known Mexican form, or that 
it would be described in the “ Biologia.” This not proving the case, 
and as specimens are occasionally being sent me I have thought it 
well that it should be described. 
Known to me from Texas to Fort Yuma. A specimen before me 
is labeled Illinois, but the locality is open to doubt. 
Bibliographical Reviews. 
In a recently published part of the “ Biologia Centrali-Americana 
(vol. iii, pt. 1),” in reviewing the Throscidje, it was observed that 
Throscus, as then constituted, was clearly divisible into two genera ; 
Throscus includes those in which the metasternum is simply ob- 
liquely impressed, while 
Aulonothroscus will receive those with a rather deep and well- 
defined groove. To this division belong validus, punctatus, invisus, 
condridor, convergens and pugnax, the remaining species will continue 
as Throscus, all the European species belonging here, and must be 
accepted as the typical forms. 
In the same essay, a few pages after, it will be observed that the 
name Tharops has been superceded by Isorhipis, the former name 
having been previously used. 
As an illustration of the rather restricted distribution of the Euc- 
nemidae generally, it will be observed that but few species occur 
south of our boundary which are found within it, these are Nematodes 
atropos, Mirn'orhagus humeralis and Anelastes Druryi, the first being 
somewhat doubtful, while the last is represented in both its races the 
shining {Latreillei) and opaque (Druryi) as far south as Guatemala. 
