174 NEW SPECIES MELYRIDAE, CHRYSOMELIDAE AND TENEBRIONIDAE 



subequal in length and size, subtriangular, almost circular in transverse 

 section ; ninth and tenth stouter, a little longer, subtriangular and circular 

 in section ; eleventh obovate, rather stout, about a half longer than wide. 



Pronotum about a fourth wider than long, slightly transversely 

 oblong; apex wide, moderately broadly arcuate in circular arc; apical 

 angles rather obtusely rounded; sides quite broadly arcuate, converging 

 very moderately anteriorly, more or less feebly sinuate before the basal 

 angles (see sexes), serrules moderate in size and rather irregular, 

 fimbriae moderate in length ; base broadly and rather strongly arcuate, 

 feebly sinuate laterally, angles apparently rounded although subobtuse 

 from a rather broad and reflexed denticle ; disk quite strongly convex, 

 rather strongly declivous antero-laterally, punctures rather large, some- 

 what widely spaced in the central area, intervals flat, more or less 

 indentated toward base, densely indentato-reticulato-punctate laterally. 



Elytra scarcely twice as long as wide, oblong, apex rather broadly 

 and evenly rounded ; sides parallel and slightly arcuate ; punctures rather 

 coarse, separated by a distance equal to two or three times their diameter ; 

 surface smooth, punctures finer toward apex. 



Abdomen finely and more or less densely ruguloso-punctulate ; fifth 

 ventral segment modified on the disk in the male. 



Legs moderately stout and a little longer than usual. 



Male. Slightly narrower and a little more parallel. Pronotal sides 

 rather less arcuate, as a rule slightly sinuate before the basal angles, 

 serrules a little coarser, basal angles more obtuse. Fifth ventral broadly 

 and somewhat deeply sinuate, lateral angles rather prominent and narrowly 

 rounded, adjacent surface distinctly impressed and more or less glabrous, 

 margin of impression asperate and set with rather stout black hairs which 

 may extend forward on to the fourth segment for a short distance ; termi- 

 nal segment of the abdomen set with shorter black hairs. 



Female. A little broader and more arcuate at the sides. Pronotal 

 sides, as a rule more arcuate, scarcely sinuate before the basal angles, the 

 latter more broadly rounded. Fifth ventral not very broad at apex, sides 

 converging more strongly, tip not very strongly rounded, margin narrowly 

 deflexed and asperate, surface of the segment feebly impressed. 



Measurements. Length (Types), 3.3-3.5 mm.; width, 1.2-1.3 mm. 



Holotype, male, and allotype, female, both in the collection of the 

 California Academy of Sciences ; paratypes in the Academy's and my own 

 collection. 



Type locality. Huntington Lake, Fresno County, California, at an 

 elevation of 7000 feet. Beaten from fir trees. A large series were 

 secured by Mr. E. P. Van Duzee and myself during July, 1919. 



