THE DARKLING BEETLES. 



1249 



KEY TO INDIANA SPECIES OF XYLOPINUS. 



a. Body black, not metallic. 2307 SAPERD joides. 



h. Legs black. rufipes. 



hh. Legs reddish-brown. 230g ^ NESCEXS . 

 aa, Body brown with a brassy tinge. 



2307 (7413) Xylopinus saperdioides Oliv., Ent., Ill, 1795, 11. 



_5v< vi^o;. fpphiv shining; antennae and 



Elongate, subparallel, convex. Black, feebly smni ng , 



erately convex, sparsely and finely punctured. Length 12-16 mm. 



Throughout the State; frequent. June 16-August 26. Occurs 

 especially beneath the bark of oak. 



X rufipes Say, length 11-16 mm., is said to have the same range 

 as saperdioides and is probably only a variety of that species. 



•>308 (7415) XYLOriNes ^nescens Lee, New Sp. N. Am. Col., 1866, 120. 



Elongate-oval. Brownish or piceous, bronzed, shining. Thorax one- 

 third — than long, sides broadly rounded ; ^i ^- 



less prominent. Length 13-15 mm. 



Marion County; rare. May 24. Occurs in the Middle and 



Western States." 



VI. Tenebrio Linn. 1758. (Or., "darkness.") 

 Medium-sized black or brownish, elongate-oval or parallel, feebly 

 convex forms having the tarsi clothed with a coarser, less dense and 

 more rigid pubescence than in the preceding genera ; antenna, 

 gradually thicker toward the tip; palpi and tarsi short. Four spe- 

 eds are known from the United States, all of winch occur m In- 

 diana. 



KEY TO SPECIES OF TENEBRIO. 



a. Trcchantin of middle cox* very distinct ; form elongate, narrowly oval 



or parallel. 9 obscurus. 



h. Surface dull, opaque; length 14-11 mm. 



hh. Surface more or less shining. ^otitor 

 c. Thorax broader than long ; length 13-16 mm. 2310. mol,tor. 



cc Thorax nearly square; length 9-10 mm. 2311. castaneus 



aa TrocMntin of middle coxre very small; form more broadly oval; length 



ad. llOCIlctULiii u 9Q19. TENEBRIOIDES. 



12-13 mm. 



