THE SHINING FUNGUS BEETLES. 



493 



enlarged, forming a loose, slender club; scutellum usually wanting 

 but when present broadly triangular. Thirteen nominal species 

 from the United States are recognized by Casey. Of those six are 

 known from Indiana. 



KEY TO INDIANA SPECIES OF BJSOCERA. 



a. Scutellum not visible. 



b. Larger species, not less than 2 nun. in length. 



c. Sides of thorax feebly and evenly curved when viewed from the 

 side; basal marginal stria of elytra entire. 

 d. Third antennal joint very long, slender, subequal to fourth ; ely- 

 tra sparsely but distinctly punctate. 943. concolor. 

 <hl Third joint much shorter and thicker ; form less broadly oval ; 

 elytra smooth. 944. congener. 

 cc. Sides of thorax strongly bent downward behind the middle ; basal 

 stria of elytra broadly interrupted ; third antennal joint long and 

 slender. 945. deflexa. 

 bb. Smaller species, never much exceeding 1.5 mm. in length; narrowly 

 oval ; third antennal joint not longer than fourth. 

 e. Elytra not punctate. 



f. Length 1.6 mm. ; epimera of mesosternum extending two-thirds 



tO COXa?. SPECULIFER. 



ff. Length n|>t over 1.3 mm. ; mesosternal epimera longer and nar- 

 rower. 946. APICALIS. 



ee. Elytra sparsely, coarsely and shallowly punctate. 



947. PUNCTIPENNIS. 



a a. Scutellum visible, very minute and transverse ; length less than 1.3 mm. 

 g. Hind angles of thorax normally acute; color reddish-brown to pic- 

 eous. 948. picea. 



gg. Hind angles of thorax obtusely truncate ; color deep black. nana. 



943 (2978). B.eocera concolor Fab., Syst. Eleut, II, 1801. 576. 

 Oblong-oval, broad, strongly convex. Black, high- 

 ly polished; legs, antenna? and tips of elytra and ab- 

 domen reddish-piceous. Thorax three-fourths wider 

 than long, apex one-third as wide as base. Scutellum 

 wanting. Elytra barely as long as wide, scarcely 

 twice as long as thorax, broadly truncate at apex; 

 sparsely and coarsely punctate. Length 2.7 mm. (Fig. 

 175.) 



Throughout the State ; frequent. March 25- 

 September 25. Occurs on fungi. fig 175 x ~ la 



944 (9S54). BjEOCERA congener Casey, Ann. N. Y. Acad. Sci., VII, 1S93. 



517. 



Rather stout, oval. Black; legs and antennae pale reddish-brown. An- 

 tenna? shorter than head and thorax, third joint much shorter than second, 

 three-fourths the length of fourth. Thorax and elytra much as in concolor. 

 from which it differs chiefly by its smaller size and antennal structure. 

 Length 2 mm. 



