344 



REVISION OF TIIK TENEBKIONIDiE OF AMERICA, 



ii Mid on the disc. The elytra are striate, the strise punctured. The interstices are mod- 

 erately convex and finely punctured. The legs are black and the under surface of the 

 bod) smooth. 



Length .4 !-.<> 1 inch. 



Common in nearly the entire region east of the Mississippi River, under loose bark. 



X. I'ufipes, Say, Tenebrio) Journ. Acad. \".. 303. 



Scarcely different from the preceding. The legs are red except the bases of the til>ia\ 

 It dm- nut differ in size and sculpture from the preceding, and though common, is less so 

 than saperdoides, and occurs in the same region. 



X. senescens, Lee, N. Species, p. ISO. 



Differs from the preceding two species, by its broader thorax and by the elytra being 

 more dilated behind the middle. The color is pale brown, with a brassy tinge. The lees 

 are slender, and the tooth of the anterior tibia of the male is less prominent and the emar- 

 gination below it less deep. 



Length .50— .51 inch. 



Middle and Western States, not common, though more abundant in the latter region. 



SUB-TRIBE II — TENEBRION ES. 



In this group the tarsi are clothed with a coarser, less dense, and more rigid pubes- 

 cence than in the preceding. The body is always elongate, never robust, usually de- 

 pressed. The mentum is trapezoidal, generally flattened. The tibial spins are always 

 conspicuous. The epipleurse are variable in length. 



Our genera are as follows: 



Antenna' gradually thicker toward the tip, palpi and tarsi short. 

 Epipleurse entire. 

 Epipleurse abbre\ iated. 



Head sub-quadrate ; similar in the sexes. 

 I bad transverse; dissimilar in the sexes. 

 Antenna- elongate, slender, last joint fusiform; palpi long; tarsi slender. 

 Epipleurse entire. 



Mentum emarginate in front. 

 Mentum truncate in front. 

 The genera of this sub-tribe are much less homogeneous than the Upes, although 



fewer in number, and this dissimilarity seems to indicate that, by the division of the Ten- 



ebrionidse and their apportionment in tribes by the discover) of better characters than 



those now known, these genera would not be found associated. The genus Sitophagus 

 has been placed here (as done by Mulsant), the form of the anterior coxa- indicating but 

 little affinity with the genera allied to Uloma. 



TENEBRIO. 



mis. 

 SIT0PHAG1 S 



AI.-KI'IIl S. 

 El PSOPHUS. 



