34 INSECTA, 
less beyond the mentum. The scutellum is situated between the 
elytra. 
The first section will form the genus 
LucaNnvus. 
We will make a first division with those in which the antennal club 
consists of but from three to four joints or leaflets. 
We will begin with Insects, which, with the exception of their 
antennz, are almost entirely similar to Oryctes,a subgenus of the 
preceding tribe. The mandibles are concealed, edentate, and alike 
in both sexes. The mentum is almost triangular, and completely 
conceals the ligula, as well as the base of the maxillee. The body is 
thick and convex above, almost cylindrical and rounded exteriorly. 
The thorax is truncated and excavated before. The head of the 
males is furnished with a horn. 
SinopenpRoN, Fab. 
Antennal club formed by the three last joints*. 
Those which have a thick, convex, ovoid body; mandibles forming 
a compressed and vertically projecting forceps in the males; a head 
much narrower than the thorax measured in its greatest width; and 
the tibize, at least the two anterior ones, broad and in the form of a 
reversed triangle, form two subgenera, viz. 
fMsatus, Fab. 
Where the mandibles, even in the males, are shorter than the head, 
and terminated posteriorly in the manner of a horn; the mentum 
conceals the maxille; the ligula is very small; the body short and 
arched; the head almost entirely received into the emargination of 
the thorax ; the tibize are compressed and triangular, and the sternum 
simple or without any projection . 
Lamerima, Lat. 
Where the body is more elongated; the mandibles much longer 
than the head, in the males laminiform, vertical, angular, much 
dentated and pilose on the inner side; the maxillee are exposed down to 
the base; the ligula very distinct; the labrum elongated; the two 
anterior tibiee widened, and offering in the males a palette (spur) in 
the form of a reversed triangle, and a sternal point f. 
Two other subgenera established by M. Mac Leay, Jun., approxi- 
mate to Lamprima in their prolonged mesosternum, projecting, how- 
ever, less than in the preceding ones, in the head, which is much 
narrower than the thorax, and finally in their mandibles, the inner 
side of which is furnished with down; but their body is flattened or 
* Scarabeus cylindricus, L.; Oliv., Col., I, 3, ix, 88. It is the only species known, 
the remaining Sinodendrons of Fabricius belonging to other genera. ; 
¢ satus scarabeoides, Fab. ; Panz., Faun. Insect. Germ., XXVI, 15, 16. 
{ Lat. Gener. Crust. et Insect., II, p. 132, Lethrus eneus, Fab. ; Schreib., Lin. 
Trans., VI, 1. See also Mac Leay, Hor. Entom., I, 99. 
