170 NEW SPECIES MELYRIDAE, CHRYSOMELIDAE AND TENEBRIONIDAE 



and not noticeably compressed ; ninth distinctly wider than long and with 

 the tenth and eleventh just a little wider than the fifth ; tenth a little longer 

 than the ninth, subtriangular ; eleventh not more than twice as long as 

 wide, nearly an elongate oval. 



Pronotum about a fourth wider than long, evenly convex, more 

 declivous antero-laterally ; apex arcuato-truncate in circular arc; sides 

 broadly arcuate, less so anteriorly and moderately convergent to apex, 

 serrules short and more or less acute, fimbriae rather short and not closely 

 placed; angles broadly rounded, the anterior less so; base broadly and 

 rather evenly arcuate, scarcely sinuate laterally within the angles; disk 

 in the central area rather sparsely punctured, punctures less than coarse, 

 not very sharply defined although deep, intervals rather irregular in width 

 and from two to four times wider than the punctures, not noticeably 

 indented, lateral thirds distinctly and moderately coarsely and densely 

 indentato-punctate. 



Elytra somewhat oblong-oval, sides moderately arcuate although sub- 

 parallel, about twice as long as wide; discal punctures not coarse, sepa- 

 rated by a distance equal to one or three times their diameter, finer toward 

 apex and more widely spaced, surface feebly transversely rugose. 



Abdomen finely and rather densely punctate; fifth ventral segment 

 modified on the disk in the male. 



Legs moderate in length and stoutness ; tarsi of medium length. 



Male. Oblong-oval, subparallel, somewhat robust as compared to 

 the male of bifasciatus. Antennae just a little stouter than in the female. 

 Fifth ventral segment distinctly emarginate, emargination arcuate and 

 moderately deep, lateral angles prominent, impressed surface of the seg- 

 ment subasperate,- pubescence longer and blackish to brownish. Meta- 

 femora moderately stout and subfusiform. 



Female. Oblong-ovate, rather more convex posteriorly, sides a little 

 more arcuate ; pronotal sides more strongly arcuate posteriorly. Antennae 

 slightly shorter and a little more slender; fifth ventral rather broadly 

 rounded at apex ; abdominal apex with blackish pubescence. 



Measurements. Length (Types), 3-3.3 mm.; width, l-1.2mm. 



Holotype, male, allotype, female, in my own collection ; paratypes in 

 that of the California Academy of Sciences and that of Mr. F. W. Nunen- 

 macher. 



Type locality. Willow Creek, Humboldt County, California. Col- 

 lected by Mr. Nunenmacher on May 20, 1911, and myself on June 13, 1916. 



Distribution. California (Humboldt County; Siskiyou County, 

 June 2, 1911 ; Mokelumne Hill, Calaveras County, April). 



This elegant species in its oblong-ovate or oblong-oval form, rather 

 wide elytral fasciae, quite slender antennae which are very nearly similar 



