380 
INSECTA. 
Pasimachus, Bon. 
Approximates to the last in the jaws, which are straight, and des- 
titute of a terminal hook. 
The antennae are of equal thickness. The body is much flattened 
and oval, thorax cordiform, broadly truncated behind, almost as wide 
at its posterior margin as before and as the base of the elytra ; this 
margin almost straight, and merely somewhat concave in the middle. 
This subgenus is peculiar to America * (a). 
According to Count Dejean — Spec., II, p, 471 — after the Pasi- 
machi, should come his genus Scapterus, formed with a species from 
the East Indies, sent to him by one of the most zealous of the French 
entomologists, M. Guerin, to whom it is dedicated. Whether the 
maxillae resemble those of the preceding subgenus I do not know, 
hut the body is differently proportioned, being elongated and cylin- 
drical. The antennae are shorter in proportion than usual ; the second 
joint is square, somewhat thicker than the others, which are short, 
almost square, and become gradually stouter. 
In the following the maxillae are arcuated and hooked at the end. 
The antennae become sensibly thicker towards the extremity. The 
thorax is always separated posteriorly from the base of the elytra by a 
well marked space or angle. 
Here the exterior palpi are terminated by an almost cylindrical 
joint, not narrowed into a point at the end. 
Acanthoscelis, Lat. 
This subgenus is remarkable for the four posterior tibiae, which are 
short, broad, arcuated, plane and slightly concave on their internal 
face, convex, and covered with granules or little spines on the opposite 
one, with the superior edge dentated, and the posterior teeth large 
and compressed ; the trochanter of the two posterior thighs is very 
large. 
The bodj^ is short, wide, convex above ; the thorax transversal, round- 
ed laterally, and its posterior margin sinuous ; spurs of the anterior 
tibim very long, and the others almost laminiform. 
The only species known — Scarites rujicornis, Fah. — inhabits 
the Cape of Good Hope. 
Scarites, Fab. 
The four posterior tibia? narrow, generally smooth, and merely fur- 
nished with little spines on their ridges, and intermediaries have at 
most one or two teeth on the exterior side ; the trochanter of the pos- 
terior thighs much smaller than the thighs themselves. The mandi- 
bles form elongated ti'langles, and are strongly dentated at base. The 
* Refer to this subgemis the Scarites depressus, and Sc. marginatus, Fab. and Oliv. 
See tbe Spec. Gen. des Coleop. I, p. 405 : the Entomological Observations of 
Bonelli : and the work of Palisot de Beauvois on the Insects collected by him in 
America and Africa. 
(a) All the Pasimaohi hitherto discovered are peculiar to North America. But 
four species are known, the P. depressus, marginatus, suhlceris, and the P. sxibsulcatus, 
Say. — E ng. Ed. 
