158 Memoirs on the Coleoptera 



Calosoma sagax n. sp. — Rather broadly oblong and convex, shining, 

 black, without metallic lustre outside of the dorsal fovese; head large, 

 two-thirds as wide as the pro thorax, with the usual prominent eyes; 

 surface rather loosely, subvermiculately sculptured, with intermingled 

 rather fine punctures; epistoma only feebly impressed at the middle, 

 the deep lateral excavations extending to apical third; mandibles semi- 

 circularly rounded externally; antennae short, as long as the thoracic 

 width, with joints five to eight glabrous medio-basally on the more 

 compressed sides, the glabrous area successively diminishing on the 

 following joints; prothorax just visibly less than twice as wide as long, 

 widest slightly before the middle, the sides broadly arcuate, only slightly 

 oblique posteriorly, the basal angles rounded as usual but only very 

 slightly produced behind; lateral edge rather sharply reflexed, more 

 broadly at base; surface shining, vermicularly but not very coarsely or 

 densely rugulose or punctate; basal fovese rather deep, at some distance 

 from the sides; median stria moderate, subentire; elytra short, about a 

 fourth longer than wide, a third wider than the prothorax, barely visibly 

 wider behind the middle, the apex very obtusely ogival; humeral angles 

 rapidly rounded; surface with sets composed of three rows of moderate 

 impressed irregular punctures, the sets separated by a wide smooth and 

 rather convex interval, bearing the moderate but rather deep, umbilicate 

 foveas, the bottoms of which are bright metallic green; anterior male 

 tarsi broadly dilated. Length (cf) 17.0 mm.; width 8.0 mm. Cali- 

 fornia (Lassen Co.). 



The second and third anterior male tarsal joints are subsimilar 

 in form, the latter slightly the smaller, and they are both about 

 twice as wide as long. This species differs from the others of this 

 series in the relatively large head among other important features. 



Calosoma rectilatera n. sp. — Much narrower than the preceding, deep 

 black, without metallic ground lustre, rather shining, the anterior parts 

 dullish; head well developed, not so large as in the preceding but three- 

 fifths as wide as the prothorax, with prominent eyes; surface moderately 

 and rather closely punctured, very densely on the neck and more coarsely 

 rugose toward each eye; epistoma very broadly and deeply impressed, 

 the impression separated from each of the deep lateral excavations by a 

 rounded oblique ridge; mandibles moderate, circularly rounded ex- 

 ternally, finely and but feebly and partially sculptured; antennae mod- 

 erate though distinctly longer than the thoracic width, with joints five 

 to eleven glabrous on the flatter sides, either entirely, or, in the case of 

 the outer joints, in a small basal area; prothorax of peculiar form, four- 

 fifths wider than long, parallel, the sides very feebly arcuate, gradually 

 more rounding apically, rather narrowly reflexed, more so basally, the 

 angles moderately produced and broadly rounded; surface with close- 

 set punctures, becoming rugulose peripherally and especially coarse 

 and dense in the foveae, which are rounded, rather deep and at some 

 distance from the sides; elytra oblong, two-fifths longer than wide, a 

 fourth or fifth wider than the prothorax, just visibly wider behind, 



