PTEROSTICHUSLE 327 



that they should constitute a distinct genus, as named in the table. 

 The maxillary palpi are long and slender, but the fourth joint is 

 distinctly shorter than the third. The mentum tooth is very 

 broad, with the apex deeply sinuate medially, the lobes rounded. 

 The mandibles are finely and closely striate, except toward the 

 inner and outer margins and apex. The prosternum is subsulcate, 

 the process wholly unmargined, and the head is strongly tumid 

 behind the eyes. The known species are as follows: 



Elytral striae widely and evenly spaced, the intervals virtually flat even 

 toward the sides; body larger and more elongate, cylindric, the outer 

 basal thoracic fovea separated from the sides by an obtuse though 

 pronounced carina, the basal angles somewhat prominent; scutellar 

 stria moderate, generally continuous with the first stria, the basal 

 part of the latter detached. Length (of 9 ) 14.8-16.0 mm.; width 

 4.8-5.0 mm. North Carolina (Black Mrs.) rostrata Newm. 



Elytral striae unevenly spaced, closer, deeper and sulciform toward the 

 sides, where the intervals are narrower and extremely convex; spe- 

 cies not quite so large in size 2 



2 Pronotum with a fine, rather sharp carina near and parallel to the 

 side margins basally; elytral striae not evidently punctulate, the 

 scutellar stria distinct, moderately long; elytra distinctly wider than 

 the prothorax 3 



Pronotum without a distinct carina near the margin posteriorly; elytral 

 striae distinctly punctate; scutellar stria indistinct 4 



3 Head (cf ) larger, nearly as wide as the prothorax, the eyes much less 

 prominent than the tumidity behind them; body deep black and 

 polished in both sexes; antennae much compressed, extending rather 

 behind the thoracic base; medial striation of the mandibles coarser; 

 prothorax virtually as long as wide, the base nearly four-fifths as 

 wide as the apex, the sides feebly arcuate, becoming gradually very 

 slightly sinuate toward the obviously sharp hind angles, which are 

 a little more than right; inner basal fovea large, deeply impressed 

 and smooth, the outer narrow and feeble along the pronounced 

 carina; elytra much shorter than in rostrata, three-fifths longer than 

 wide, rather obtusely rounded behind, the sinus very faint. Length 

 (cf 9 ) 12.7-14.7 mm.; width 4.4-5.0 mm. Probably Indiana. 



sulcatula n. sp. 



Head not quite so large, the eyes almost as prominent as the tumidity 

 behind them; body narrower, less deep black and more piceous, 

 similar in lustre and general sculpture, very shining; mandibular 

 striation finer; antennae slightly shorter; prothorax nearly similar, 

 though not so large; elytra similar in general character but narrower, 

 the sublateral series of coarse foveae similarly subconfluent poste- 

 riorly. Length (d*) 13.5-14.5 mm.; width 4.2-4.6 mm. New York 

 and Maine. Two examples piceata n. sp. 



4 Elytra not wider than the prothorax, the striae deep, punctate; body 

 in general rather similar to the preceding but with distinct punc- 



