626 FAMILY XXV. HISTERlDy*:. 



following ; prosternum broader than long, truncate at tip ; mesoster- 

 num truncate ; front tibite dilated and two-toothed. Six species are 

 listed from the United States, t^^•o of which have been taken in In- 

 diana, while another perhaps occurs. 



KEY TO INDIANA SPECIES OF BACANHS. 



a. Pro- and mesosterna smooth or very sparsely punctured ; elytral punc- 

 tures simple, rounded. 

 6. Subhumeral and first dorsal strise of elytra both entire, the latter not 

 arching at base ; pygidium very minutely punctulate. misellus. 



bb. Subhumeral striae abbreviated at apex, first dorsal short ; pygidium 

 distinctly punctured. ■ 1201. tantillis. 



aa. Pro- and mesosterna coarsely punctate; first dorsal striiB entire, bi-oadly 

 arching at base ; elytral punctures elongate, substrigose. 



1202. PI NCTIFORMIS. 



B. misellua Lee. brownish-red, length .8 ram., is recorded from 

 "the ]\Iiddle States region." 



1201 (3645). Bacanius tantillus Lee, Proc. Phil. Acad. Nat. Sci., 1S5;J. 



291. 



Broadly oval, convex. Dark reddish-brown, shining. Thorax distinctly 

 but not densely punctured. Elytra more coarsely punctured than thorax ; 

 the subhumeral stria abbreviated at base and apex. Pygidium strongly in- 

 Hexed, rather coarsely and distinctly punctured. Length 1-1.2 mm. 



Monroe County; scarce. June 0. Sifted from debris of beech 

 stump. Larger and less convex than the next species. 



1202 (3646). Bacanius puinctieormis Lee., Proe. Phil. Aead. Xal. Si-i.. 



1853, 28S. 



Rounded-oval, subglobose. Dark brownish-red, moderately shining. Tlio- 

 rax finely and sparsely punctured. Elytra with dense aciculate, elom.Mtr 

 punctures. Length 0.75 mm. 



:Marion, Putnam, Dubois and Posey counties; scarce. :\Iarch 

 25-July 4. Taken while sifting in earl>^ spring and also beneath 

 bark of half decayed elm logs. Probably more common than indi- 

 cated, but overlooked on account of minute size. 



XXL AcRiTPS Lee. iS.-iH. ((|i-., "iudistiuguishabU'.") 



The species of this geuus are vei'y minute and may be Imown liy 

 the four-jointed hind tarsi and distinct scntellum. As in the two 

 preceding and the following genera, the scape of the antenna? is 

 lodged, when at rest, in a deep groove in front of the eye. Eleven 

 species are listed from the L'nited States, two of which have been 

 taken in Indiana. 



