ClCINDELHXE AND CARABID^ 135 



though not externally, but I do not think that the peculiar brevity of 

 the elytra, they being only equal in length to the head and prothorax 

 combined, can be due to abnormality, as they are symmetrical in 

 outline. This species differs very much from any other in general 

 appearance, and, from any form of cor acinus, in its absolutely 

 impunctate striae. 



Of coracimts, there are a number of subordinate forms, mutually 

 so closely allied, however, that it would require careful and detailed 

 study, with very large material, to delimit and define them. 



Ventralis group. 



A few small species, having remarkably polished integuments and 

 coarse and externally subobliterated, generally strongly punctate 

 stride, alone constitute this group ; the dorsal f oveae are generally three 

 in number. LeConte included tumescens in his most recent arrange- 

 ment, but I think the general habitus of this species, and several 

 others allied thereto which are at hand, having oblique thoracic 

 impressions, should rather form part of Evarthrus than of Pterostichus. 

 The following is allied to ventralis: 



Pterostichus putus n. sp. Form rather slender, moderately convex, 

 polished throughout and testaceous in color; head rather short, moderate 

 in size, the impressions short, deep and arcuate; labrum with rounded 

 angles; prothorax about a fifth wider than long, the sides evenly and 

 strongly rounded from apex to base, more converging basally, the angles 

 very obtuse and rounded; base unmargined, sinuate from side to side 

 and narrow, but little more than half the maximum width; surface 

 subevenly convex, very finely margined at the sides, the single latero- 

 basal impression longitudinal, linear, not attaining the base; median 

 stria very fine and feeble; elytra three-fourths longer than wide, not 

 evidently wider than the prothorax, oblong-oval, with feebly arcuate sides 

 and strongly rounded subparabolic apex, the strise strong, moderately 

 impressed, rather closely and conspicuously punctate, the seventh feeble, 

 wholly obliterated before the middle, the scutellar subobsolete, hardly 

 visible behind the fovea; intervals very moderately convex; tarsi rather 

 short, very slender. Length (cf 9 ) 8.5-8.7 mm.; width 2.6-2.8 mm. 

 Texas. 



The abdomen is punctured irregularly toward the sides as in 

 ventralis, from which putus may readily be distinguished by the 

 narrower form, narrower thoracic base and finer side margins, the 

 former sinuate throughout the width and not merely medially, as 

 it is in ventralis, in the very much stronger, closer and more con- 



