ClCINDELID/E AND CARABID^ III 



Tarsi more slender as a rule; sides of the prothorax sensibly sinuate 

 toward the hind angles 3 



3 Prothorax scarcely visibly narrower than the elytra, at first sight 

 not at all narrower 4 



Prothorax very evidently narrower than the elytra 5 



4 Form rather stout, subparallel, moderately convex, shining, deep 

 black, the elytra evidently and equally alutaceous in both sexes; 

 head not quite three-fifths as wide as the prothorax, nearly as in 

 the preceding, except that the epistoma is sinuato-truncate and the 

 labrum even more sinuate medially; prothorax larger and wider 

 than in any other of the group, similar in the sexes and a fifth to 

 fourth wider than long, the sides arcuate, rather strongly converging 

 posteriorly, becoming very feebly sinuate near the angles, which 

 are obtuse but sharp and even a little prominent; base transversely 

 truncate, three-fourths the maximum width, the surface nearly as 

 in the preceding, the outer impression distinct but shallow; elytra 

 oblong, with parallel and very feebly arcuate sides and evenly 

 rounded apex, rather more than two-thirds longer than wide, the 

 impunctate striae moderately fine but somewhat deep, the intervals 

 nearly flat; humeri and scutellar stria as in the preceding; hind 

 tibiae (cf) with rather shorter and sharper inner crenulation, the 

 tarsi not more slender and virtually similar. Length (d 71 9) 15.0- 

 16.2 mm., width 5.6-5.8 mm. New Mexico zunianus n. sp. 



Form slender, rather more depressed, much smaller in size, subparallel, 

 piceous-black and frequently paler, rather shining throughout, the 

 elytra not sensibly opaculate; head moderate, nearly as in the 

 preceding but with relatively narrower epistoma and labrum, the 

 eyes similarly well developed and convex; prothorax a fourth wider 

 than long, the sides rather strongly arcuate, converging and only 

 a little less arcuate posteriorly to near the angles, where they become 

 just visibly sinuate for a short distance, the angles obtuse but sharp 

 and minutely, feebly prominent; surface slightly convex, the inner 

 impression distinct and fully a third of the total length, the outer 

 obsolete; base feebly sinuate medially, margined near the sides, 

 fully three-fourths the maximum width; elytra barely more than 

 three-fifths longer than wide, subequal in width to the pro- 

 thorax, parallel, with broadly arcuate sides and rounded apex; 

 striae fine, impunctate, rather deep, the intervals very slightly convex ; 

 legs rather short, the hind tibia? (cf ) feebly crenulate internally, 

 the tarsi rather slender but with the first joint shorter than the 

 next two combined. Length (c? 9 ) 9.5-11.2 mm.; width 3.2-3.9 

 mm. Colorado (Boulder Co., Leadville and Eldora) and Montana. 

 Abundant longulus Lee. 



5 Sides of the prothorax only broadly and feebly sinuate toward the hind 

 angles, which are obtuse though rather sharply defined and some- 

 times feebly and minutely prominent. Body rather narrow and 

 elongate, only feebly convex, shining, the elytra alutaceous; color 

 black, though not very intense and frequently rufescent; head nearly 

 three-fifths as wide as the prothorax, almost as in the preceding; 

 prothorax between a fourth and fifth wider than long, the sides 



