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, 

 but 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, Lai. 



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 body is short, wide, convex above ; the thorax transversal, round- 

 ed laterally, and its posterior margin sinuous ; spurs of the anterior 

 tibiae very long, and the others almost laminiform. 



The only species known — Scarites ruficornis. Fab. — inhabits 

 the Cape of Good Hope. 



Scarites, Fab. 



The four posterior tibiae 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 triangles, and are strongly dentated at base. The 



* Refer to this subgenus the Scarites depressus, and Sc. marginatus, Fab. and Oliv. 

 See the 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. 



{J^ (a) All the Pasimaohi hitherto discovered are peculiar to North America. But 

 four species are known, the P. depressus, marginatus, sublceris, and the P. subsulcatus, 

 Say. — Eng. Ed. 



