American Caraboidea 293 



feebly sinuate apex; anterior transverse impression evident, the posterior 

 obsolete, the short deep stria well impressed; punctures rather strong, 

 close toward apex and more gradually so toward base, also rather close 

 along the median line and toward the sides, elsewhere sparse; margins 

 moderately reflexed; foveas short, longitudinal, deeply impressed, remote 

 from the base and near outer fifth; scutellum with sinuate sides and acute 

 tip; elytra one-half longer than wide, nearly four-fifths wider than the 

 prothorax, very faintly inflated posteriorly, the sides very rapidly rounded 

 at base; apex rounded, with feeble sinus; strije not much impressed but 

 strongly punctate, the punctures very gradually smaller behind, traceable 

 nearly to the apex; intervals nearly flat, very finely, rather closely 

 punctate and briefly fulvo-pubescent; scutellar stria long and strongly 

 punctate; under surface punctured throughout; tarsi infumate distally. 

 Length (9) 15.3 mm.; width 6.65 mm. Mississippi (V'icksburg). 



Comparable only with prasinus Dej., but differing in its more 

 abbreviated form, shorter antennae, less transverse and latero- 

 basally more sinuate prothorax, and more closely, much more 

 finely punctate surface of the elytra, which also has finer, shorter 

 and denser pubescence. 



The species allied to leucoscelis have been greatly confused, but 

 there seems to be but little need for the recorded uncertainties; 

 leucoscelis was described from Mexico by Chevrolat, and a series 

 in my collection taken at Tugson, Arizona, agrees perfectly with 

 his description and also with that of monachiis Lee. I regard this 

 therefore as typical leucoscelis, with synonym monachus; it is 

 moderate in size, indigo-blue in color, with slightly transverse 

 prothorax, irregularly punctate, as usual in the group, and rather 

 coarse impressed stria?, which are strongly punctate, the punctures 

 obsolete behind about the middle. The species described by Kirby 

 as cordicollis is strikingly distinct when observed in juxtaposed 

 series; it is much larger, with broader elytra, having less impressed 

 striae, which are subequally punctured; it inhabits a climatically 

 very different region in the north and east of the country. San- 

 antonialis Csy., resembles leucoscelis, having similar indigo colora- 

 tion and coarse, deeply impressed striae, but the general form of 

 the body is more abbreviated and the prothorax is shorter and more 

 transverse, and gilensis Csy., is smaller, much narrower and more 

 convex, with less impressed striae and much finer and shorter 

 pubescence. I believe these four are truly species, and I have to 

 add here two more as follows: 



