464 FA5IILY XI. STAPHYIJNIDiE. 



with a very deep triangular exeavation, and B. palUpr iiiiis Say, 9 

 nim. in length, with head hlaeki-ih. suture and tips of elytra fuscous; 

 gula with a shallow exeavation. 



Group B. 



Small or medium-sized ,si)ei-'ies having the side margins of thorax 

 acute, the Hank's coneiivi'; mandibles stout, strongly toothed near 

 the tip; rows of spines on front tiliia' widely separated. 



KEY TO INDIANA SPECIES OF GROI'P B. 



(/. Side pieces of prosteruuni very distinctly triangular, the sutures di- 

 rected to tlie front angles of the thorax. 

 &. Head coarsely punctured; chestnut brown, shining; elytra and legs 

 paler. semiferbuoikeus. 



hi). Hend not or obsoletely punctured; thorax not wider than long, 

 i-oarsely punctured; chestnut brown, elytra and abdomen reddish- 

 brown. 804. rUMATUs. 

 (la. Side pieces of i)ri)Sternum not triangular, the sutures parallel with the 

 side margin iif the under surface or flank of thorax, 

 c. Eeddish-brnwn ; head and thorax darker; tip of abdomen blacl;. 



Siiri. ANAIJS. 



cc. Blackish-brown; elytra, antenna; and legs brown; dorsal impresse 1 

 line of thorax wanting. nitidicoi.lis. 



B. semifrniifjiiifus Lee., 4.5 in length, occurs from Michigan to 

 Florida and has been taken near Cincinna'ti. No authentic speci- 

 men ha,s been seen from the State. 



X!t4 (2719). Bledius fumatus Lee.. X. Sp. N. Ainer. Col., I, ISO.'l. 52. 



Elongate, robust, subej-lindrical. Dark chestnut or reddish-brown, shin- 

 ing ; head and thorax piceous, legs and tip of abdomen paler. Head finely 

 granulate, sparsely and hidistinctly punctulate. Thurax not wider than 

 long, sides strongly rounded into base; disk coarsel,\- and rather closely 

 punctate, the median line deep. Elytra slightly wider and more finely 

 punctate than thorax. Al)dcimen at base narrower than elytra, sparsely 

 punctate above, more finely beneath. Length ri..")-6.5 mm. 



Lake, Kosciusko and Vigo counties; rare. May 30-July IS. 

 S'.iri (2723). Bledus analis Lee. X. Sp. X. Ainer. Col., I, isii:!. 52. 



Elongate, slender, sul)eylindrical. I'ale reddish-brown; head, thorax 

 and tip ol' abdomen black; elytra fusec.us about the scutellum and along 

 the suture to middle. Ile.id finely granulate, sparsely and finely punctate. 

 Thorax as wide .as long, sides straight to behind middle, thence strongly 

 rounded into base; disk not granulatc\ ci>nrsely and rather closely punc- 

 tate, the median line fine but distinct. Elytra deeply and rather closely 

 punctate. Abdomen nearly smooth above, sparsely punctulate beneath. 

 Length 4 mm. 



Lake, Putnam and Dubois counties; scarce. May I'J-July 10. 

 Occurs under cover along llie banks of streams and lakes. 



