Horn.] 10 J [Oct. 2, 



closely articulated. Tarsal claws cleft very near the base, the lower por- 

 tion not half the length of the upper. Spurs of hind tibiae dissimilar, the 

 outer cylindrical, the apex truncate and slightly expanded, inner spur 

 slender. 



The males have the anterior tarsi simple, the last ventral with a shallow 

 triangular emargination. 



From Southern California, precise locality not known. 



C. Morrison!, n. sp. 



Elongate, black, thorax orange red. Antennae black, slightly thick- 

 ened externally, joints moniliform ; head transversely quadrate, usually 

 with a central rufous spot, parallel for a short distance behind the eyes, 

 hind angles rounded, surface sparsely punctate ; thorax scarcely longer 

 than wide, widest one-third from apex, apical third more rapidly nar- 

 rowed, posterior two-thirds slightly narrowed, disk feebly convex ; a slight 

 median depression posteriorly, surface sparsely but distinctly punctate 

 and with shortened black hairs ; elytra scabrous, with very short hairs ; 

 body beneath black, shining, sparsely pubescent ; posterior tibial spurs 

 dissimilar, the outer cylindrical, truncate, slightly broadened at tip, the 

 inner slender and acute ; claws deeply cleft, the lower portion more than 

 half the length of the upper. Length .42-. 64 inch ; 10.5-16 mm. 



Male. The anterior tarsi are simple. Last ventral broadly triangularly 

 emarginate and slightly longitudinally impressed. 



In color this species resembles the following, but the head and thorax 

 are very distinctly punctate and more or less pubescent. It is, moreover, 

 much larger, and the surface scarcely shining. 



Occurs in Southern California, and was found rather abundantly by 

 Mr. Morrison. At the time when I had but a unique of the next species 

 I supposed these to be merely fully-developed specimens of it. 



C. nemognathoides Horn, Trans. Am. Ent. Soc., 1870, p. 92. 



Black, moderately shining, thorax red. Antennae comparatively slender, 

 the joints longer than wide, not moniliform ; head quite smooth, with few 

 very indistinct fine punctures ; thorax as wide as long, sides arcuately 

 rounded in apical half, disk convex, without impression, surface smooth 

 and shining ; elytra scabrous, sometimes feebly so, surface moderately 

 shining ; body beneath black, shining ; spurs of hind tibiae dissimilar, the 

 inner slender, acute, the outer cylindrical, truncate, and slightly wider at 

 tip ; claws not deeply cleft, the lower portion two-thirds the length of the 

 upper. Length .22-.32 inch ; 5.5-8 mm. 



In the male the anterior tarsi are slender. The last ventral segment is 

 deeply incised. 



This species might be supposed to be merety a feebly developed form 

 of the preceding. The differences have there been given, to which might 

 here be added the form of the antennae. It also resembles several of our 

 species of Nemognatha. 



Occurs in Owen's Valley, Cal., and in Arizona near Fort Yuma. 



