i6o Memoirs on the Coleoptera 



transversa; it is represented in my collection only by the female. 

 Cancellata is represented by four specimens from various parts of 

 Oregon. 



The two following species belong to the tepida section, but are 

 much smaller in size: 



Calosoma pellax n. sp. — -Rather small and narrow, moderately convex, 

 not very shining, deep black throughout; head fully three-fourths as 

 wide as the prothorax, with the usual abruptly very prominent eyes; 

 surface closely, deeply punctured and subrugose, more coarsely rugose 

 toward each eye, broadly impressed anteriorly; epistoma not impressed 

 medially at apex, the lateral grooves deep, separated from the apex by a 

 thin margin; mandibles unusually long and narrow, rapidly rounding 

 toward tip; antennae nearly one-half longer than the thoracic width, 

 the joints five to nine with a broad feeble glabrous groove along the 

 flat sides; prothorax relatively small, two-thirds wider than long, the 

 sides parallel, evenly and circularly rounded from apex to base and 

 sharply reflexed, widely and vertically so at base, the basal angles 

 much narrower than in the preceding section, rounded and feebly pro- 

 duced behind; surface deeply and very closely punctate, more coarsely 

 and rugosely so peripherally, the median stria very fine; fovese rather 

 small, deeply concave, adjoining the reflexed sides; elytra two-fifths 

 longer than wide, fully one-half wider than the prothorax, distinctly 

 in^ated behind, the sides broadly arcuate, rapidly rounded at the humeri, 

 where the edge has three distinct serrations; surface with about fifteen 

 fine and feeble striae, much confused at the sides, the intervals crossed 

 by deep lines forming asperulate tessellation; umbilicate foveae of the 

 three series very moderate, their bottoms bright cupreous; third anterior 

 male tarsal joint short, twice as wide as long. Length (cf") 16.0 mm.; 

 width 7.2 mm. A single specimen without indication of locality, but 

 probably from Oregon or adjacent region. 



Very distinct in its rather small size, less convex surface, canalicu- 

 late antennal joints, long and slender mandibles and other fea- 

 tures. 



The species described by me some years ago under the name 

 indigens, differs from pellax in its broader prothorax, widest sensibly 

 before and not at the middle, in its shorter, more regularly arcuate 

 mandibles and convex, uncanaliculate and more glabrous fifth 

 antennal joint. From tepida it differs in its smaller size and 

 rather narrower form, in the much less densely strigilato-rugose 

 mandibles, trapezoidal and not briefly parallel epistoma, less 

 posteriorly projecting hind thoracic angles, more slender tarsi and 

 shorter tarsal claws ; it is however, somewhat more closely allied to 

 tepida than it is to any other described species. 



