52 INSECTA. 
In some, the antenne are thick, cylindrical or fusiform, perfoliate, 
pilose, and apparently composed of but ten joints, the eleventh or 
last being very short and but little distinct; the second is as large as 
the following one. 
Corticus, Dej.—Sarrotrium, Germ. 
Where the antenne are cylindrical and terminated by a larger 
joint, forming a little club *. 
Orruocervs, Lat.—Sarrotrivm, Ilhg. 
Where the antennz, wider in the middle, form a densely pilose 
club, with most of the joints transversal, and the last much narrower 
than the preceding ones f. 
The antenne of the others are of an ordinary size, simply granose, 
neither perfoliate nor pilose, and consist of eleven distinct joints. 
CuiroscE.is, Lam. 
Two stout teeth on the outer side of the two first tibie ; antennze 
terminating in a small and nearly globular transverse club, formed 
by the two last joints ¢. 
Toxicum, Lat. 
The tibiz simple ; club of the antennz compressed and formed by 
the three last joints; head triangular; thorax nearly square, and 
almost isometrical §. 
Boros, Herbst—Hyporu.aus, Fab. 
The tibie simple, and the club of the antenne compressed and 
formed by the three last joints; but the body is almost linear, the 
head oval and narrowed posteriorly, the thorax oval and truncated 
at each extremity, and the last joint of the maxillary palpi forming 
a truncated ovoid and but slightly inflated ||. 
3. Those in which the body is equally narrow and elongated, and 
the thorax almost square, but where the antenne are of the ordinary 
thickness, and are not abruptly terminated by a club. 
The two anterior thighs are stout, and the tibie narrow and 
curved, or arcuated. 
Here the penultimate joint is perfectly similar, both in form and 
size, to the preceding; and the latter, like all the others, is neither 
dilated nor canaliculated above. In 
Caxcar, Dej.—Trocosita, Fab., 
The thorax forms a long square, the body is linear, of equal width 
* Sarrotrium cellis, Germ., Insect. Spect. Nov., p. 146. 
+ Hispa mutica, L.; Panz., Faun. Insect. Germ., I, 8. 
t Chiroscelis bifenestra, Lam., Ann. du Mus. d’Hist. Nat., No. 16, XXII, 2;— 
Tenebrio digitatus, Fab. 
§ Toxicum richesicnum, Lat., Gener. Crust. et Insect., II, p. 168, and I, ix, 9. 
I have seen another species in the cabinet of M. Labillardi¢re, which from its ap- 
pearance seems to be closely allied to Opatrum. 
|| Boros corticalis, Gyll., Insect. Suec. I, ii, p. 584 ; Hypophleus boros, Fab. ;— 
B. thoracicus, Gyll., Ib., p. 586. 
