COLEOPTEilA. 
453 
The legs of the other Clavicornes are inserted at an equal distance 
from each other. Those in which these organs are not contractile, 
and the tarsi at most can only be flexed on the tibiae, whose mandi- 
bles are most commonly salient and flattened or not thick, and whose 
praesternum is never dilated anteriorly, will constitute five other 
tribes. 
In the third tribe of this family, that of the Stlphales, we find five 
distinct joints in all the tarsi, and the mandibles terminating in an 
entire point without emargination or fissure* *. The antennae termi- 
nate in a club that is most commonly perfoliaceous and consisting of 
from four to five joints. The internal side of the maxillae, in most 
of them, is furnished with a horny tooth. The anterior tarsi are fre- 
quently dilated, at least in the males. The exterior margin of the 
elytra of the greater number is marked by a groove with a well raised 
border. 
This tribe is composed of the genus 
SiLriiA, Lin . — Peltis, Geoff. 
Here the antennae are suddenly terminated by a short and solid club, 
formed by the four last joints ; the second is larger than the folloAving 
ones. The body is almost square, the elytra are truncated, the tibiae 
dentated, the tarsi simple, and the mandibles bidentated on the inner 
side; the last joint of the maxillary palpi is as long as the two pre- 
ceding ones taken together. There is a horny tooth on the inner 
side of the maxilhe. So closely do these Insects resemble the His- 
teroides, that Fabricius confounded them. Such are those which 
form the 
Sph.erites, Dufts.- — Sarapus, Fisch. — Hister, Fab. — Nitidula, 
Gy lien j-. 
Here, the antennae termitiate in a perfoliaceous club. 
Sometimes the body is oblong, and the head, strangulated poste- 
riorly, is as wide as the anterior margin of the thorax, or not much 
narrower; the latter forms a square with rounded angles; the elytra 
form a long square, and are suddenly and strongly truncated at their 
posterior extremity. The posterior thighs, at least in the males, are 
usually inflated. The last joint of the maxillary palpi is rather more 
slender than the preceding one, almost cylindrical, somewhat smaller 
at the end, and obtuse. The anterior tarsi are dilated in the males. 
Payk., Ib., XI, 1 ; — H. X, 8; — the hisjiidv.s, Id., XI, 2, appears to be con- 
generic. The genus Ceiitocerus of Gerniar, Insect. Spec. Nov., T, p. 85, 1, 2, from 
the form of the antennae, legs, &e., would naturally seem to come after the Hiate- 
roides. but the elytra cover the abdomen and the mandibles are not salient. I have 
never seen a specimen of this genus. 
* Dentations, however, are sometimes found on the internal side, as in ypha;rites. 
•h Dufts., Faun. Aust., I, p. 206; Hister glahrafus, Fab.; Sturm, I, .xx; Serapus, 
Fisch., Mem. of the Soc. of Nat. Hist, of Moscow. 
