92 FAMILY TF. OAT? Alii 0.1-:. 



Fulton. Parko. Viffo, Jackson. Crawford and Posey counties; 

 scarce. Occurs principally hciicath h)^< in deep shaded ravines. 

 April 13-Noveiiiber 4. 



P. rostratus Newm., 14-1 H mm., P. mhslriafus Lee, 12-14 mm., 

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

 which favors the probaliility of their occni-i'ing in Indiana. 



Group B. 



This group comprises black, medium sized species ranging in 

 length from 10 to KJ mm. They have two or three dor.sal punctures 

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

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

 The side pieces (episterna) of the metathorax are short, and nearly 

 as broad at apex as liase. 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 GROl^P B. 



(I. Thorax nni'mwer at base than apex; prosternum not margined behind. 

 J). Outer striic of el.vtra indistinct; thorax finely margined; elytral striie 

 not punctured. 124. obscurus. 



hi). Outer stri;e of elytra nearly or (piite as deep as inner; thorax strong- 

 ly margined. 

 c. Dorsal pnnctnres two (rarely tlu-ee or four). 



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



<1<L Basal impressions large, broad. 

 c. Hind angles of thorax earinate. 



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



//. Basal impressions with an obtuse flattened tubercle. 



V2C). STYGicrs. 

 cc. Hind angles not earinate; iinpressions withont a tubercle. 



127. RELICTUS. 



CC. Dnrsal pnnctnres lour; hind angles earinate. siipercii.iosus. 



(/(/. Therax broader at base than apex; i>rosternnni margined behind; dor- 

 sal punctures three. ' 128. permundus. 



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

 ibid. II. 53S. 

 Elongate, slender. Black ; antennre, tibire and tarsi dark reddish-brown. 

 Thora.x somewhat trapezoidal in shape, narrowed behind; basal impressions 

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

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

 third on second stria ; iiUervals flat, stria- shallow. Length 10.5-12 nun. 



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. 



