THE CHECKERED BEETLES. 



VII. ZENODOSUS Woleott. 1910. (Gr., a proper name.) 



Eyes small, entire, finely granulated; maxillary palpi moder- 

 ately compressed; labial palpi triangular, moderately dilated; an- 

 tenna? stout, club loosely and gradually formed, 3-jointed; tarsi ap- 

 parently 4-jointed, rather slender, claw joint as long as those pre- 

 ceding united, claws simple. The only known species is North 

 American. 



1634 (5180). ZENODOSUS SANGUINEUS Say, Bost. Journ. Nat. 



Hist., I, 1835, 162 ; ibid. II, 639. 



Elongate, rather slender. Head, thorax and under sur- 

 face fuscous-brown ; apical joints of antenna 1 , legs and ab- 

 domen usually dull red; elytra bright crimson or blood-red, 

 feebly shining. Head and thorax densely and continently 

 punctate. Elytra coarsely, densely and rather deeply punc- 

 tate, the sides subparallel. Length 4.5-6.5 mm. (Fig. 336.) 



Koseiusko, Marion, Putnam and Duhois counties; 

 scarce. April 17-Deceruber S. Occurs beneath bark Fl y4 36 ' 



and niOSS. (Original.) 



VIII. HYDNOCERA Newm. 1838. (Gr., "swollen + horn.") 



Eyes entire, finely granulated ; maxillary palpi cylindrical, 

 smaller toward apex of terminal joint ; labial palpi elongate, 

 strongly dilated; antenna* nearly filiform, club abruptly formed, 

 compact, subglobose, 2-jointed, the terminal joint very small; tarsi 

 apparently 4-jointed, rather slender, short, claws broadly toothed 

 at base. About 45 species of this genus are known from America 

 north of Mexico. Six of these have been taken in Indiana, while 

 three or four others perhaps occur. 



KEY TO INDIANA SPECIES OF HYDNOCERA. 



a. Thorax broader than long or the length and width subequal. 

 b. Elytra entirely covering the abdomen. 



c. Very elongate, strongly convex; black, elytra with a whitish cross- 

 bar just behind the middle. 1635. UNIFASCIATA. 

 cc. More robust and less convex ; elytra without crossbar. 



d. Flanks of thorax distinctly tuberculate; elytra not densely pu- 

 bescent, the humeri usually red. 1636. HUMERALIS. 

 <hl. Flanks of thorax broadly rounded; elytra very densely clothed 

 with short grayish pubescence. ITHF.SCENS. 

 lilt. Elytra shorter than abdomen. 



e. Head including the eyes narrow ; elytra parallel. PEDALIS. 



ee. Head including the eyes broad ; elytra more or less narrowing to- 

 ward their tips. 



