32 MEMOIRS ON THE COLEOPTERA 



represented in my collection; it is obviously widely different from 

 peregrinator. Another is an example of carbonata Lee., from Oak 

 Creek, Ariz., its most western limit of range known to me. Ingens 

 Csy., is, I think, a distinct species and not a subspecies; it has a 

 much shorter and relatively broader hind body than in peregrinator 

 or carbonata and is of very much larger size than amplipennis. All 

 of these species and subspecies, together with apacheana Csy., 

 form a group distinguished by the rather large head, long antennae, 

 more or less feebly angulated sides of the prothorax and feeble 

 elycral sculpture. The third specimen represents an undescribed 

 species, which may be known as follows: 



Calosoma Clemens n. sp. Size very much smaller and more slender, 

 deep black, rather shining; head and prothorax relatively much smaller 

 than in the peregrinator group, the former with very prominent eyes; 

 vertex sparsely but rather coarsely punctate; mandibles with the incurved 

 apex very acute, strongly, transversely rugose throughout above; an- 

 tennae slender, shorter than in peregrinator, extending to] basal fifth or 

 sixth of the elytra, the third joint as long as the next two; prothorax 

 three-fourths wider than long, conspicuously small in size, the sides 

 obtusely angulate at the middle, strongly rounded anteriorly, oblique 

 and nearly straight posteriorly; base feebly sinuate at each side, the 

 posteriorly produced angles small and acute, somewhat everted at tip; 

 surface feebly convex, very finely punctulate and confusedly creased, 

 moderately and rather sparsely punctured along the sides and apex and 

 more coarsely punctured and rugose along the base; latero-basal im- 

 pressions rather narrow and deep; sides somewhat broadly and feebly 

 concavo-deplanate, the edge very moderately re flexed ; elytra nearly three- 

 fourths longer than wide, almost twice as wide as the prothorax, very 

 slightly wider at apical fourth than at base, the sides very feebly arcu- 

 ate, the apex obtusely ogival; surface with fine striae of minute punctures, 

 connected by transverse and rather deep coarse lines basally and laterally, 

 the foveae very minute; lateral margins somewhat broadly re flexed and 

 just visibly metallic steel-bluish; legs slender, rather short, the hind tarsi 

 three-fourths as long as the tibiae; anterior tarsi (cf ) as in peregrinator 

 but rather less dilated. Length (of 1 ) 20.0 mm.; width 8.2 mm. Nevada 

 (Las Vegas), -Spalding. 



This species belongs to the prorninens, parvicollis, subgracilis 

 section of the genus, which is well distinguished from the pere- 

 grinator section by the smaller head; the sides of the elytra basally 

 are feebly serrulate in both these sections, but in lugubris, with 

 which peregrinator is compared by Bates, these serrulations are 

 obsolete; the prorninens referred to by Bates at the same place in 

 the "Biologia," is undoubtedly parvicollis Fall and not the true 



