460 INSECT A. 



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

 most isometrical(l). 



Boros, Herbst. Hypophlseus, Fab. 



The tibiae simple, and the club of the antennae 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(2). 



3. Those in which the body is equally narrow and elongated, and 

 the thorax almost square, but where the antennae are of the ordinary 

 thickness, and are not abruptly terminated by a club. 



The two anterior thighs are stout, and the tibiae 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 

 throughout, the anterior border of the head is emarginated, and the 

 three last penultimate joints of the antenna are almost globular, and 

 not sensibly transversal(S). 



Upis, Fab. 



The thorax as in Calcar; the body narrow, but not linear; anterior 

 edge of the head straight and unemarginate; penultimate joints of 

 the antennae lenticular and transversal(4). The 



Tenebrio, Lin. Fab. 



Or Tenebrio properly so styled, only differs from Upis in the 

 thorax, which is more broad than long. 



T. molitor , L. ; Oliv., Col., Ill, 57, 1, 12. Length seven lines; 

 brown, verging on a black, above; maronne and glossy beneath; 

 thorax as wide as the elytra; square, and with two posterior 



(1) Toxicum richesianum, Lat., Gener. Crust, et Insect., II, p. 168, and I, ix, 9. 

 I have seen another species in the cabinet of M. Labillardiere, which from its 

 appearance seems to be closely allied to Opatrum. 



(2) Boros corticalis, Gyll., Insect. Suec. I, ii, p. 584; Hypophlseus boros, Fab.; 

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



(3) Trogosita calcar, Fab. 



(4) Upis ceramboides, Fab.; U. saperdoides, Bosc. 



