American Caraboidea 235 



impressed, the intervals notably convex; scutellum pale. Length 

 7.2 mm.; width 3.3 mm. New York (Buffalo) tricolor Say- 

 Head pale, similar in color to the prothorax, legs and most of the under 

 surface; prothorax widest at about the middle, the sides rounded 



and widely reflexed 3 



3 — Size smaller, the striae fine- and feebly impressed, the outer angle of 

 the truncature rounded. Color rather pale rufo-fiavate throughout, 

 excepting the epipleura and abdomen, which are piceous and black 

 respectively, the elytra dark blue; head rather more than three- 

 fourths as wide as the prothorax, with large and prominent eyes; 

 front faintly strigilate near the eyes; antennae slender, blackish, 

 the first three joints testaceous; prothorax four-fifths wider than 

 long, the basal angles obtuse but not rounded; rugulae fine and 

 faint; basal channel not very deep; elytra two-fifths longer than 

 wide, twice as wide as the prothorax, gradually arcuately narrowing 

 behind; surface shining, though micro-reticulate, the striae closely 

 micro-punctulate, the third with two widely separated punctures 

 as usual; intervals very nearly flat; tarsi slender, blackish. Length 

 5.4-6.5 mm.; width 2.6-2.9 mm- New Jersey, Indiana, Illinois 



and Lake Superior (Marquette). Abundant atriventris Say 



Size rather large, the striae deeply impressed, the intervals convex; 



elytra dark indigo-blue; prothorax relatively wider 4 



4 — Outer angle of the elytral truncature rounded. Body stout, oblong- 

 suboval, moderately convex, strongly shining, the elytral micro- 

 reticulation fine, very feeble in the male; coloration as in atriventris, 

 except that the abdomen and epipleura are piceous and the tarsi 

 not blackish; head nearly three-fourths as wide as the prothorax, 

 with large and remarkably prominent eyes, the front feebly and 

 unevenly rugulose; antennae slender, half as long as the body, 

 fusco-testaceous, the first three joints paler; prothorax twice as wide 

 as long, the strongly arcuate sides very convergent anteriorly; basal 

 angles rather obtuse, the tips sometimes bluntly subprominent; 

 surface feebly rugulose, smoother in the broad lateral reflexed 

 regions; base broadly pedunculate, the transverse channel along 

 the peduncle rather deep; elytra a little longer in the male, two- 

 fifths longer than wide, four-fifths wider than the prothorax; striae 

 deeply impressed, with very obscure micro-punctulation; intervals 

 convex, having some feeble scattered punctulation laterally; anterior 

 male tarsi distinctly dilated, the third joint feebly and bluntly 

 channeled above. Length 8.7-9.8 mm.; width 4.1-4.7 mm. New 

 York to northern Illinois and southward to North Carolina. Abun- 

 dant grandis Hentz 



A — Similar to grandis throughout in coloration and size, the elytra 

 rather more alutaceous, with nearly flat intervals and less deeply 

 impressed striae, which are more evidently micro-punctulate; 

 antennae shorter, less than half as long as the body, the joints 

 much less elongate; scutellum similarly pale. Length (9) 8.5 

 mm.; width 3.9 mm. Texas (Brownsville), — Wickham. 



rivularis n. subsp. 

 Outer angle obtuse but rather well defined, not definitely rounded; size 



