ClCINDELID/E AND CARABID^ 65 



rower than the widest part of the elytra, the sides rounded, moderately 

 oblique posteriorly, the angles broadly rounded and slightly produced 

 posteriorly; surface closely, not coarsely punctured, becoming densely 

 rugose laterally, the basal impressions large and deep; elytra parallel, 

 two-fifths longer than wide, sculptured as in cancellata but less deeply 

 and a little more coarsely, the indications of striae less evident; tarsi very 

 short, the posterior barely two-thirds as long as the tibiae. Length (9 ) 

 17.0 mm.; width 7.4 mm. California (near San Diego), Dunn. 



Distinguishable at once from cancellata, which is more northern in 

 distribution in California and Oregon, by its smaller size and nar- 

 rower, more parallel form, much shorter antennae and still shorter 

 tarsi, by the relatively much broader prothorax, more parallel 

 and more convex elytra and more evenly punctulate propleura. 



Calosoma transversa n. sp. Larger and much stouter but similar 

 throughout in coloration, lustre and sculpture; head large; prothorax 

 still shorter, a little more than twice as wide as long, the oblique sides 

 posteriorly very much less converging, the lateral impressions much 

 shallower; elytra broad, barely a third longer than wide, not parallel 

 but much swollen behind the middle, where they are nearly a fourth wider 

 than at base and two-fifths wider than the prothorax; surface less convex 

 than in esuriens and still more feebly sculptured; tarsi longer than in 

 either of those species, the posterior rather more than four-fifths as long 

 as the tibiae; antennae rather short, not as long as in cancellata, though 

 equal in length to the thoracic width. Length (9) 20.0 mm.; width 

 8.8 mm. California (near San Diego), Ricksecker. 



Differs from the preceding in its much broader form, feebler 

 sculpture and less convex, posteriorly inflated elytra, longer tarsi 

 and antennae and many other features, and, from cancellata, in the 

 very much feebler sculpture, broader and more transverse, less 

 posteriorly narrowed and more feebly impressed prothorax, among 

 other differential characters. 



Tristoides Fall, is so distinct from tristis, in its very much larger 

 and stouter form, more convex, shining surface and fine punctures, 

 that there is really no close relationship between them; in fact it 

 would have been better to give it a more distinctive name. I have 

 two examples, both females, from Arizona and southern California, 

 in which the elytra are relatively shorter than in any of a good series 

 of the typical coast form at hand; they probably represent a sub- 

 species of tristoides. In this connection, attention ought to be 

 called to a male and female of semilcevis Lee., found at Alameda, 

 where the normal form was also taken abundantly, which have the 



T. L. Casey, Mem. Col. IV, Oct. 1913. 



