268 MEMOIRS ON THE COLEOPTERA 



The last dorsal segment of the abdomen is broader basally and 

 with more strongly converging sides than in either of the species 

 mentioned in the description. In nigrella the male elytra are dark 

 brown in color throughout. 



The following species is allied to auripilis and chrysocoma, which 

 are amply distinct and by no means connected subspecifically; 

 auripilis is twice as large as auricoma and differs in its much less 

 crowded and more distinct thoracic punctures, as well as in the less 

 rapidly cuneiform elytra and many other features: 



Leptura (Cosmosalia) aureola n. sp. Form, size and vestiture nearly 

 as in auripilis Lee.; head and antennae nearly similar, except that the 

 latter are not black throughout but become largely pale testaceous 

 basally, excepting the basal joint, which is black; prothorax of similar 

 outline but less densely pubescent, the hairs shorter, the punctures much 

 less close-set, being separated medially by two to three times their 

 diameters; elytra nearly similar but with the punctures less fine, differing 

 distinctly in the external outline apically, which here rounds in more 

 rapidly to the narrower apical truncatures. Length (9) 16.8 mm.; 

 width 5.5 mm. Colorado. 



The two type examples, from the Levette collection, are perfectly 

 similar and have been compared with a typical female of auripilis 

 from Jemez Springs, New Mexico, virtually the type locality, which 

 is Santa Fe. The fourth palpal joint in auripilis has a very deep 

 excavation extending from near the base to and through the truncate 

 apex. A third female of aureola before me, from Boulder Co., 

 Colorado, more clearly displaying the palpi and differing from the 

 types only in having entirely black antennae possibly from greater 

 maturity the fourth palpal joint is very different, having only a 

 very feeble elliptical flattening, extending from basal to apical third 

 of the length. A single male, also from Boulder Co., is much smaller 

 and very much more slender than the female and has the fifth ventral 

 broadly, rectilinearly truncate at apex, with broadly rounded angles 

 at the sides. The prothorax is relatively distinctly larger in auri- 

 pilis than in aureola. 



Group III. 



Subgenus Cercolia nov. 



Two similarly colored species alone compose this subgenus, as 

 far as known to me. They are deep black throughout the body, 

 legs and antennae, and with hexagonal, strongly, very densely 



