American Caraboidea 243 



transverse impression fine and very feeble; basal lobe and channel 

 distinct, the stria fine, abbreviated anteriorly; elytra longer than 

 usual, nearly one-half longer than wide, feebly inflated posteriorly, 

 fully twice as wide as the prothorax; striae extremely fine, unim- 

 pressed, in part subobliterated, the sutural a little stronger; intervals 

 flat. Length 4.0 mm.; width 1.5 mm. New Mexico (Las Vegas); 

 one, taken by Prof. Snow in Kansas, seems identical., .evoluta n. sp. 



9 — Antennae somewhat thicker and shorter, less than half as long as the 

 body, the medial joints only about one-half longer than wide; 

 body more minute. Shining, dark blue, somewhat more greenish 

 anteriorly; under surface shining, bluish-black; head fully as long 

 as wide, slightly narrower than the prothorax, with rather large 

 and prominent eyes; surface distinctly though sparsely punctate 

 from side to side, except basally; third antennal joint much longer 

 than the fourth; prothorax very nearly twice as wide as long, sub- 

 parallel, rounded anteriorly; basal angles subprominent; margins 

 abruptly reflexed, narrowly so anteriad, more broadly at base; 

 surface very finely, rather closely rugulose, the basal lobe and 

 sulcus distinct, the stria very fine; elytra between a third and fourth 

 longer than wide, gradually slightly wider behind, the sides rapidly 

 rounding to the apical truncature, twice as wide as the prothorax; 

 striae extremely fine and feeble, the intervals flat. Length 3.65 

 mm.; width 1.4 mm. Rhode Island (Boston Neck). 



histrica n. sp. 



Antennae longer and more slender, the joints twice as long as wide or 

 longer 10 



10 — Sides of the prothorax rather broadly and very abruptly reflexed 

 throughout from apex to base, as usual more broadly so basally. 

 Upper surface shining, metallic bluish-green; under surface and 

 femora shining, greenish-black; head not quite as wide as the 

 prothorax, with large and prominent eyes; surface with some 

 minute scattered punctures anteriorly, finely and feebly strigato- 

 rugulose postero-laterad; antennae half as long as the body; pro- 

 thorax four-fifths wider than long, the sides parallel, rounding in 

 apical third, the angles sharp; basal deplaniture flexed upwardly; 

 surface finely rugulose,' at base as in the preceding, the median 

 stria fine; elytra a third longer than wide, feebly inflated posteriorly, 

 slightly more than twice as wide as the prothorax; striae very fine 

 and unimpressed but distinct, the intervals flat. Length 4.2 mm.; 

 wadth 2.0 mm. A single specimen found unlabeled in the Levette 

 collection and probably from Indiana bracata n. sp. 



Sides of the prothorax finely reflexed anteriorly, more broadly at base. . il 



II — Prothorax wider, subequal to half the elytral width 12 



Prothorax, though very transverse, always much less than half as wide 

 as the elytra 13 



12 — Form somewhat elongate, rather shining, deep cobalt-blue through- 



• out above, the under surface and femora blackish-green, the epi- 



pleura violet-black; head well developed and with very prominent 



eyes, almost as wide as the prothorax, finely strigilato-rugulose, 



with some intermingled very minute punctures, smoother centrally; 



