THE SHINING FUNGUS BEETLES. 491 



coxae small, rounded and widely separated ; hind ones oval or trans- 

 verse, also widely separated ; tarsi 5-jointed, long and slender. 



About 200 species of Scaphidiidffi are known, 41 of which have 

 been described from the United States. The principal literature 

 treating of the family is as follows: 



LeConte. "Synopsis of the Scaphidiidaa of the U. S.," in Froc. 



Phil. Acad. Nat. Sci., 1860, 321-324. 



Casey. -"Synopsis of the Scaphidiidte, " in Ann. N. Y. Acad. 

 Sci.. VII, 1893, 510-533; Journ. N. Y. Entom. Soc., VIII, 

 1900, 55-60. 



Representatives of four of the seven genera comprising the 

 family have been taken in Indiana, while those of two others may 

 occur. 



KEY TO INDIANA GENERA OF SCAPHIDIID^E. 



a. Scutellum distinct ; anteunre with a broad, abrupt and somewhat flat- 

 tened 5-joiuted club ; elytral punctures in TOWS. 



&. Hind tibite not spiuous ; eyes eiuarginate ; hind angles of thorax acute 



and somewhat prolonged backward. I. SCAPHIDIUM. 



&&. Hind tibia? with rows of small spines; eyes entire; hind angles of 



thorax not prolonged. CYPARIUM. 



aa. Scutellum minute or wanting ; antennae slender, without distinct club ; 



elytral punctures, when present, scattered. 



0. Third antenual joint elongate and cylindrical ; scutellum usually in- 



visible, when present transverse. 



d. Body oval ; sutural stria of the elytra reaching the base ; hind 



coxa 1 widely separated. II. B^EOCERA. 



dd. Body narrowed, more or less compressed; sutural stria not reach- 

 ing the base; hind coxae less separated. III. TOXIDIUM. 

 cc. Third antennal joint very short, wedge-shaped or triangular, nar- 

 rowed to the base; scutellum present, minute, triangular. 



e. Length 1.5 or more mm. ; hind coxal plates very short and their 



curve developed only on the inner side. IV. SCAPHISOMA. 



ee. Length less than 1 mm.; hind coxal plates semi-elliptic; antennae 



shorter and stouter. SCAPHIOMICRUS. 



1. SCAPHIDIUM Oliv. 1791. (Gr.. "tub or boat -f small.") 



Here belong our most common members of the family, readily 

 distinguished by the larger size, emarginate eyes and produced hind 

 angles of thorax. The male is known by having a large, depressed, 

 punctate and pubescent area on the middle part of the metasternum. 

 One species and two varieties have been taken in the State. 



KEY TO INDIANA SPECIES OF SCAPHIDIUM. 



o. Elytra each with two to four short rows of large punctures. 



1).. Elytra each with two transverse, reddish spots which extend inward 

 ^two-thirds the width, 942. QUADRIGUTTATUM. 



