458 iiSSECTA. 



Tenebrio, 



As originally arranged by Fabricius, and to which we will annex his 

 Opatrum and Orthocera; they will serve for types of as many parti- 

 cular divisions. 



1. Those in which the body is oval; the thorax nearly trapezoidal, 

 arcuated laterally, or forming a semioval, truncated anteriorly, 

 wider than the abdomen, at least at its posterior margin, but slightly 

 or not at all bordered; in which the maxillary palpi terminate by a 

 securiform joint or one of an analogous figure, and where the an- 

 tennae insensibly enlarge. In 



Crypticus, Lat. Blaps, Fab. 



The body is convex and smooth above; the head exposed or but 

 slightly received into the. emargination of the thorax, and its ante- 

 rior edge unemarginate; the eyes exterior or entirely outside of the 

 anterior concavity of the thorax; and this last part insensibly in- 

 clined on the sides and but slightly emarginated before. The antennae 

 are almost as long as the thorax, and most of their joints in the 

 form of a reversed heart or turbiniform, the penultimates alone being 

 more rounded or almost granose, but not transversal. The tibiae 

 are always narrow and elongated, and the spurs of their extremity 

 tolerably salient(l). 



Opatrum, Fab. Dej. Phylan, Meg. 



The body generally less elevated and even frequently depressed; 

 the head and eyes received posteriorly into a deep notch in the tho- 

 rax, with a small anterior emargination in which the labrum is fixed. 

 The thorax is depressed along its sides; the antennae are shorter 

 than the thorax, mostly granose, and the last joints lenticular and 

 transversal. 



The elytra are scabrous or striated. The spurs of the tibiae are 



very small, and the two anterior are broad and triangular in several. 



O. sabtdosum; Silpha sabulosa, L.; Oliv., Col., Ill, 56, i, 4. 



Length of the body four lines; black; usually appearing of a 



cinereous-grey above; oval; thorax arcuated laterally, and rather 



^1) Pedi7ius glaber, Lat., Gener. Crust, et Insect., II, p. 164; Htlops glaber, 

 Oliv., Col., Ill, 58, ii, 12; Blaps glabra, Fab., and some other undescribed species 

 from Spain and the Cape of Good Hope. 





