PTEROSTICHIN^; 361 



wide, barely visibly (cf ) or a fourth (9 ) wider than the prothorax, 

 the striae not coarse but rather strongly punctate and unusually im- 

 pressed, the scutellar wanting as usual in this genus; intervals feebly 

 convex. Length (cf) 13.5-15.0, (9) 14.5-15.5 mm.; width (of 1 ) 

 4.5-5.0, (9) 5-3-5-9 mm. Indiana, Iowa, Missouri, Kansas and 

 Arizona seximpressus Lee. 



Body larger and much stouter, especially in the female, and with rela- 

 tively much larger prothorax in both sexes; coloration and lustre 

 nearly as in the other species, the elytra opaque in both male and 

 female as usual, the anterior parts rather strongly shining; head 

 better developed, three-fifths to two-thirds as wide as the pro- 

 thorax, the eyes moderate in size but rather prominent; sulci sinu- 

 ous, slightly converging; antennae as usual; prothorax a fourth wider 

 than long; base broadly sinuate except laterally and just visibly 

 wider than the apex, the incised anterior line deep and entire; stria 

 extending from the incised line to the base and rather fine, coarser 

 subbasally; impressions obsolete, the depression near the inner foveae 

 diffuse and transversely sublineate; foveae linear, moderate in length, 

 widely separated, joined transversely submedially by a feeble depres- 

 sion, which is acutely lineate at the bottom ; carina distinct, rather dis- 

 tant from the sides; elytra more oblong-oval than usual, one-half 

 to three-fifths longer than wide, a fifth to sixth wider than the pro- 

 thorax, the moderate striae rather sharply incised, the punctures 

 deep and rather small but nearly as in the other species, the scu- 

 tellar stria wanting; intervals very feebly convex (cf), flat (9). 

 Length (cf 9 ) 16.0-17.5 mm.; width 5.8-6.8 mm. North Carolina 

 (Southern Pines), Manee. Four examples americanus Dej. 



7 Form stout and with dull lustre throughout in the female, the elytra 

 opaque; body and legs deep black; head larger, two-thirds as wide 

 as the prothorax, the eyes rather large and prominent; sulci acutely 

 very deep, parallel but contorted; antennae fusco-testaceous, the 

 four basal joints black, the first three glabrous as usual; mandibles 

 striate only internally; prothorax two-fifths wider than long; base 

 broadly sinuate except at the sides, equal in width to the more feebly 

 sinuate apex, the margination broad, the incised line deep, entire 

 and more arcuate than usual; sides finely reflexed anteriad, broadly 

 posteriad, evenly arcuate to the small and feeble oblique basal sin- 

 uation, the angles more than right; ruguliform lines of the surface 

 few and faint, wanting basally; transverse impressions obsolete, the 

 posterior visible near each inner fovea in a small depression as in 

 seximpressus; inner fovea very deep and briefly sublinear, the outer 

 short, rectangularly inflexed at base, the carina moderate, rather 

 distant from the margin; scutellum very broad, finely rugose; elytra 

 oblong-suboval. one-half longer than wide, a third wider than the 

 prothorax; sides feebly arcuate, the sinus broad but distinct; humeral 

 ridge pronounced; striae rather fine, distinctly impressed throughout, 

 the punctures well spaced, very deep and distinct though not coarse; 

 intervals very slightly convex, the marginal stria very close to the 

 eighth; prosternum deeply sulcate. Length (9) 20.5 mm.; width 

 7.3 mm. Texas (Houston) enormis n. sp. 



