By! Prof. Westwood on 
This insect, to which Major Parry has given the name 
above employed, is most nearly allied to Rhwtus West- 
wood, from which it is sufficiently (subgenerically) 
distinct, by the smaller size of the head (which in that 
insect is as large as the prothorax), by the upper surface 
of the head and prothorax being entirely covered with 
minute granulations, rendering them subopaque (instead 
of being polished); by the elytra also being covered with 
minute punctures, scarcely visible, except under a lens, 
but giving them a less brilliant appearance than they 
have in Ihetus ; in the anterior tibize being denticulated 
throughout their outer edge, in the two posterior tibize 
being armed with a small tooth on the middle of the 
outer edge (as well as the two middle tibiz), one of 
which, indeed, exhibits trace of a second rudimental 
tooth; in the regular crenation of the sides of the pro- 
thorax, destitute of the two teeth on each side visible in 
Rheetus; in the disc of the head wanting the two elevated 
spaces between the eyes, which leave the centre de- 
pressed in Ithwtus, and lastly, in the smaller size of the 
insect. 
The head is transverse, with a small raised tubercle in 
front of each eye; the anterior lateral angles being 
oblique, punctate, andslightly emarginate. The labrum 
is porrected, transverse, the lateral anterior angles acute, 
and the middle of the fore-margin moderately produced 
into an angle. It is similarly granulose with the re- 
mainder of the upper-side of the head. The antennz 
have the seventh joint produced into an acute spine, the 
sixth being also larger than the fifth. The maxille are 
elongate, the outer lobe long, and strongly setose. The 
mentum is broad at the base, the sides very oblique, and 
the middle of the anterior margin very slightly emargi- 
nate; it is not only granulate, but marked with large 
round shallow punctures. The labium is bi-partite, 
moderately setose, and the labial palpi have the basal 
joint elongated. The prothorax is transversely quad- 
rate, with the anterior and posterior lateral angies 
oblique, the lateral margins finely crenated, the disc 
convex, and marked close to the middle of the anterior 
margin with a small polished space. The sides and 
hinder margin are distinctly elevated into a slender 
margin; the suture of the elytra is polished, and the 
sides and apex of the elytra are margined. The anterior 
