52 INSECTA. 



In some, the antennae 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. — Sarkotriuai, Germ. 

 Where the antennfe are cylindrical and terminated by a larger 

 joint, forming a little club *. 



Orthocerus, Lat. — Sarrotrium, Illig. 



Where the antennse, 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 antennse of the others are of an ordinary size, simply granose, 

 neither perfoliate nor pilose, and consist of eleven distinct joints. 



Chiroscelis, Lam. 



Two stout teeth on the outer side of the two first tibise ; antennae 

 terminating in a small and nearly globular transverse club, formed 

 by the two last joints %. 



ToxicuM, Lat. 



The tibiae simple ; club of the antennae compressed and formed by 

 the three last joints; head triangular; thorax nearly square, and 

 almost isometrical §. 



BoRos, Herbst. — Hypophl.bus, Fab. 



The tibiae simple, and the club of the antennje 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 Avhere the antennae are of the ordinary 

 thickness, and are not abruptly terminated by a club. 



The two anterior thighs are stovit, and the tibiee 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 



Calcar, Dej. — Trogosita, Fab., 

 The thorax forms a long square, the body is linear, of equal width 



* Sarrotrium celfis, Germ., Insect. Spect. Nov., p. 146. 



t Hisimmutica, L. ; Panz., Faun. Insect. Germ., I, 8. 



X Chiroscelis hifene.stra, Lam., Ann. du Mus. d'Hist. Nat., No. 16, XXII, 2; — 

 Tenebrio diyitatus, Fab. 



§ Toxicum richesianum, 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. 



II Boros corticalis, Gyll., Insect. Suec. I, ii, p. 584 ; Hiipophlceus boros, Fab. ; — 

 B. thoracicus, Gyll., lb., p. 586. 



