92 



FAMILY It. — CAllABiT)^. 



Fulton, Parke, Vigo, Jackson, Crawford and Posey counties; 

 scarce. Occurs principally beneath logs in deep shaded ravines. 

 April 13-November 4. 



P. rostratus Newm., 14-16 mm., P. substriatus Lee, 12-14 mm., 

 and P. apalachius Horn, 12 mm. in length, have a known range 

 which favors the probability of their occurring in Indiana. 



Group B. 



This group comprises black, medium sized species ranging in 

 length from 10 to 16 mm. They have two or three dorsal punctures 

 on each elytron ; thorax narrowed behind and not margined at base, 

 except in permundus; the inner wings lacking except in obscurus. 

 The side pieces (episterna) o'f the metathorax are short, and nearly 

 as broad at apex as base. Of the seven species whose characters and 

 range are such as to be included in the group, five are represented 

 in the collection at hand, while two others perhaps occur in the 

 State. 



KEY TO SPECIES OF GROUP B. 



a. Thorax narrower at base than apex ; presternum not margined behind. 

 b. Outer striae of elytra indistinct ; thorax finely margined ; elytra! stria? 



not punctured. 124. obscurus. 



bb. Outer stria? of elytra nearly or quite as deep as inner ; thorax strong- 

 ly margined. 

 c. Dorsal punctures two (rarely three or four). 



(I. Basal impressions of thorax linear, deep. lachrymosus. 

 del. Basal impressions large, broad. 

 e. Hind angles of thorax carinate. 



f. Basal impressions without a tubercle. 125. coracinus. 

 //. Basal impressions with an obtuse flattened tubercle. 



126. STYGICUS. 



ee. Hind angles not carinate; impressions without a tubercle. 



127. RELICTUS. 



cc. Dorsal punctures four ; hind angles carinate. superciliosus. 

 aa. Thorax broader at base than apex ; presternum margined behind ; dor- 

 sal punctures three. 128. permundus. 



124 (542). Pterostichus obscurus Say, Trans. Amer. Phil. Soc, IV, 435; 

 ibid. II, 538. 



Elongate, slender. Black ; antennae, tibiae and tarsi dark reddish-brown. 

 Thorax somewhat trapezoidal in shape, narrowed behind ; basal impressions 

 short, narrow, punctured, hind angles very obtuse, rounded. Elytra with 

 three dorsal punctures, the first and second on or near the third stria, the 

 third on second stria ; intervals flat, striae shallow. Length 10.5-12 mm. 



Throughout the State ; scarce. April 4-November 17. In one 

 specimen before me there are four dorsal punctures on one side 

 and three on the other.; 



