THE IIISTER BEETLES. 



()1T 



tate, the first and second stria very short, basal. Front tibia, with four 

 teeth. Length 2 mm. 



Throughout the State; frequent. Hibernates beneath the bark 

 of walnut poplar and elm logs; on tree fungi in summer. F<d>ru- 

 ary 10— September 21. 



11S1 (3567). Pabomales seminulum Erichs.. loc. cit. 



" OYal rather convex. Piceous black, shining. Thorax as in Mstfiatus. 

 Elvira more coarsely punctured than thorax, with traces of two stria? at 

 base, and a short, faintly impressed sutural stria at middle. Length 2 mm. 



^ Southern half of State ; scarce. Occurs with the preceding and 

 may be sexually different only. Hibernates. February ID-Octo- 

 ber 4. 



Anapleus marglnaius Lee., broadly oval, piceous. coarsely punc- 

 tured, elytra with traces of third dorsal stria at base, length 1.5 

 mm., is known from Illinois and the District of Columbia. 



Tribe III. SAPRLNT. 

 The different genera of this tribe vary much in size and form, 

 but all agree in lacking a lobe on the front of the presternum. The 

 members of the largest genus. Sapnnus, live mostly in carcasses, 

 especially those of dead fish along the shores of rivers and lakes. 

 The others occur mostly beneath bark and stones. Six of the seven 

 genera are represented in the State. 



KEY TO THE INDIANA GENERA OF SATE1XI. 



a Antenna? inserted under the margin of the front, in repose received in 

 cavities at the sides of the presternum ; size larger. 2.5 or more mm. 



VIII. Sapsintjs. 



aa Antenna? inserted on the front, in repose received in cavities beneath 

 the sides of the thorax in front of the coxa?: size usually very small. 

 6. Eyes finely granulated, not prominent ; length 1.5-2 mm. 



c Thorax with deep lateral groove: prosternum deeply bisulcate : 

 tibia? not toothed. * x Peegaderes. 



cc. Thorax without deep lateral groove: form cylindrical; tibia? 



X. Teketries. 



toothed. 



7>7). Eyes coarsely granulated and very convex: form oval: length less 

 than 1.5 mm. 



(1. Hind tarsi 5-jointed: scutellum invisible. XL Bacaxies. 



del. Hind tarsi 4-jointed. 



e. Scutellum distinct. XIL AcKITrs - 



cc. Scutellum invisible. xnL ^l^s. 



VIII Saprints Erichs. 1834. (Gr.. "rotten.") 

 The members of this genus resemble in form those of the larger 

 species of Bister, but almost all of them have the thorax and elytra, 

 in part, at least, more coarsely punctate. The fifth dorsal stria 



