Coleopterological Notices, III. 33 



of intermedins, and, in the latter, the posterior tarsi are very short 

 but slender, with the second joint not longer than wide. 



C nitidicollis n. sp. — Slender, strongly convex, subcylindrical, 

 strongly shining throughout, intense black, the median parts of the meta- 

 sternuni and the abdomen pale rufous ; elytra very pale fiavate, with a 

 slender fusiform sutural space black ; pubescence rather short and sparse, 

 slightly longer and more erect on the pronotum. Head small ; antennae 

 (male) fully one-third longer than the body, slender. Prothorax two-fifths 

 wider than long, strongly convex and coarsely, not very densely punctate, 

 the apex truncate, much narrower than the base, lateral tubercle small but 

 distinct. Elytra two and three-fourths times longer than wide, at base equal 

 in width to the widest part of the prothorax, the sides very feebly convergent 

 thence to the apex, each elytron narrowly and almost evenly rounded behind ; 

 disk very coarsely, deeply punctate, the punctures well separated toward 

 base and becoming finer but not much closer toward apex. Legs slender; 

 hind tarsi three-fourths as long as the tibiae, with the second joint a little 

 longer than wide. Length 10.5-12.5 mm. ; width 3.3-3.8 mm. 



Arizona (Tucson). Mr. Wickham. 



This species is allied somewhat to pulchellus, but differs con- 

 spicuously in many characters as detailed in the synoptic table ; in 

 addition it may be noted that the prothorax is larger and longer 

 than in pulchellus, with the extremely slender and acute lateral 

 prolongation of the basal angles much more conspicuous. It is 

 represented before me by four specimens all of which are males. 

 The male appears to be more abundant than the female in all of the 

 species of this genus. 



SPHLENOTHECUS Dup. 

 Ischnocnemis Lee. nee Thorns. 



The Mexican species allied to this genus form a very perplexing 

 mixture, and I have several in my cabinet which cannot be satisfac- 

 torily assigned to any of the described genera. The parts most 

 useful in generic identification are the mesosternum, posterior tarsi 

 and scutellum, but the last is probably much the least important 

 of the three. The presence or absence of raised ivory vittse is, as 

 remarked by Mr. Bates, a character of subordinate import, and in 

 Sphsenothecus we have species with simple elytral disk like suturalis, 

 others having raised costse, and others again with simple narrow 

 pubescent vittse. 



Spheenothecus is allied to Mannophorus, but differs in its protu- 



