30 INSECTA. 
abruptly narrowed or insinuate a little below the humeral angles, as 
in the latter Insects. A more rigorous character, however, is, that 
here the labial palpi are inserted in lateral fossule of the anterior 
face of the mentum, so that they are entirely exposed, and that the 
sides of this mentum jut beyond them, even at their origin, and 
protect them behind. In the two first divisions these palpi are in- 
serted under the lateral margin of the mentum, or even in the 
margin, so that when viewed from before, the first joints are not 
perceptible. 
In the first— Trichides—the mentum is either isometrical, or longer 
than wide, and leaves the maxillee exposed. It comprises the 
Tricuius, Fab *. 
T. nobilis ; Scarabeus nobilis, L.; Oliv., Col., I, 6, iti, 10. 
About an inch long; golden-green above; cupreous with yel- 
lowish-grey hairs beneath. On umbelliferous plants. 
T. fasciatus; Scarabeus fasciatus, L.; Oliv., Ib., ix, 84. 
Rather smaller; black, with scattered yellow hairs; elytra yel- 
low with three transverse, black bands, interrupted at the suture. 
Very common in spring on flowers. 
T. eremita; Scarab. eremita, L.; Oliv., Ib., iii, 17. Large, 
and of a brown-black; margin of the head turned up; three 
sulci on the thorax.—On the trunk of old trees, in the interior 
of which resides the larva. 
The female of the 7. hemtpterus—Scarabeus hemipterus, L., 
Oliv., Ib., IX, 83, xi, 103—and those of some other species of 
North America are remarkable for the horny ovipositor at the 
posterior extremity of their abdomen, by which they effect a 
lodgment for their ova. 
These species are generally found on the ground, where they 
move very slowly. The last joint of their maxillary palpi is 
proportionably shorter and thicker than that of other Trichii; 
the length of the first of the posterior tarsi also appears to me 
to be considerably greater than the following one, while in the 
other Trichii it is not sof. 
The second division, Goliathides, is distinguished from the pre- 
ceding by the mentum, which is much longer, wider, and covers the 
maxillee. : 
Here the mentum is concave in the middle, and in the form of a 
widened heart or of a transversal square. The anterior extremity 
of the epistoma is neither dentate nor cornute. The thorax has the 
form of a heart, truncated at both ends and abruptly narrowed be- 
hind, or that of a transverse square, rounded laterally. 
The first joint of the antennz is very large, triampular, or in the 
form of a reversed cone. The palpi are short: the last joint of the 
. 
* Messrs. Lepeletier and Serville, Encye. Méthod., have established several new 
divisions, some of which, it appears to us, should form separate subgenera. 
+ See Schenherr, Synon. Insect., I. iii, p. 99. 
