1016 



FAMILY LII. — CERAMBYCIDtE. 



1882 (5985). Smodicum cucujiforme Say, Journ. Phil. Acad. Nat. Sci., V, 

 1826, 277 ; ibid. II, 334. 



Elongate, narrow, depressed. Pale, dull yellow, shining ; antennae slightly 

 darker. Thorax longer than broad, slightly contracted before the middle; 

 surface, together with that of elytra, rather sparsely, finely and irregularly 

 punctured. Femora much dilated. Length 7-8 mm. 



Throughout the State ; frequent. July 2-November 24. Occurs 

 beneath the close fitting bark of dead poplar, oak, locust and linn 

 trees. Has the form and habits of a number of the Cucujidae, 

 whence the specific name. 



Tribe II. CALLIDIINI. 



The species of this tribe are more or less flattened, but not very 

 slender in form, and the thorax and elytra are never armed with 

 spines. The eyes are finely granulate and deeply emarginate ; head 

 small with the front short and perpendicular ; front coxal cavities 

 transverse, open behind, the coxa* with large trochantin. Males 

 with antennas usually longer than body and thicker at base than in 

 females ; the fifth ventral segment short, subemarginate. Four 

 genera are known, to be represented in the State, while two others 

 probably occur. 



KEY TO INDIANA GENERA OF CALLIDIINI. 



a. Elytra with narrow raised white lines ; thorax with very deep median 

 groove ; thighs strongly clubbed. VII. Physocnemum. 



aa. Elytra without distinct raised white lines. 



h. Thorax very short, strongly rounded on the sides ; upper surface en- 

 tirely opaque; black, thorax red. Rhopalopus. 

 bl). Thorax not very short, the width not much exceeding the length ; up- 

 per surface more or less shining, 

 c. Front coxae contiguous, the prosternum very narrow and pointed. 



d. Palpi unequal, the labial much the shorter ; thorax rounded. 



VIII. Phymatodes. 

 dd. Palpi about equal ; mesosternum obtusely triangular. 



IX. Callidium. 



cc. Front coxae at least moderately separated. 



e. Dorsal surface of thorax with narrow median elevation and 



moderate or small ones on the sides ; prosternum broad ; hind 

 coxae inclosed. Hylotrupes. 

 ee. Dorsal surface of thorax with a broad, smooth, shining median 

 space on basal half ; elytra with more or less distinct but 

 broken whitish markings. X. Merium. 



