18 Bulletin of the Brooklyn Entomological Society Vol.X 



Type in my own collection, paratypes in U. S. Nat. Mus. and 

 Cal. Acad, of Science. 



Described from a series of about fifty specimens collected dur- 

 ing July, 191 3, and in the summer of 1914, flying about the build- 

 ings of a ranch house on the outskirts of Porterville, Cal, by my 

 friend, Dr. S. Davis. Another specimen has been seen in the col- 

 lection of Mr. Ralph Hopping, from Kaweah, Cal. This is prob- 

 ably a very local species of the lower western slopes of the 

 southern Sierras. It is one of the most cylindrical in our fauna 

 and in many specimens has a perfectly elliptical thorax. It might 

 possibly be confused with C. crenatits Horn., but the shape of the 

 rostrum, the shining appearance and more finely and sparsely 

 punctured thorax will readily separate it. It can be separated 

 from our other western species by the fact that the thorax is as 

 broad as the elytra, quite elongate and elliptical, as well as by its 

 punctuation. From C. concinnus Boh., it is easily separated by 

 its size and more shining surface and more elongate and finely 

 punctured thorax. 



C. concinnus Boh. Schon. Gen. Cure, IV, p. 1006, Horn, 

 Proc. Am. Phil. Soc, XIII, 2 Z, p. 439. 



Black, moderately shining. Head finely and sparsely punc- 

 tured posteriorly, more coarsely forwards and on rostrum. Eyes 

 quite prominent, vertex with a deeply impressed and linear punc- 

 ture slightly above the eyes, diameter of head across the eyes 

 about one third greater than greatest breadth of rostrum. Ros- 

 trum less than half the length of the thorax, basal portion about 

 equal to apical, as broad as long, with straight sides divergent 

 forwards, apical portion abruptly and widely quadrilaterally di- 

 lated and much wider than long. Joints of funicle of antennae 

 distinctly increasing in width outwards, the outermost almost two 

 thirds the breadth of the club. 



Prothorax slightly longer than broad, base bisinuate, sides 

 strongly constricted at base, then broadly rounded at first, mod- 

 erately arcuate for median half, and well rounded near apex to a 

 moderately constricted apex. Surface convex except for tri- 

 angular area at base in median line which is distinctly depressed 

 and sometimes with a faint indication of a beginning carina, 



