166 NEW SPECIES MELYRIDAE, CHRYSOMELIDAE AND TENEBRIONIDAE 



feebly prominent anteriorly at the apical angle ; fifth as wide as the tenth, 

 triangular, slightly elongate, prominent anteriorly, apical margin feebly 

 oblique ; sixth to the eighth subequal in width, sixth and eighth about 

 equal in length, sixth subtriangular and as long as wide ; seventh a little 

 longer than wide, subtriangular; eighth about as long as wide, less tri- 

 angular ; ninth about as wide as long, sides feebly arcuate ; tenth a little 

 broader, about as long as wide, sides more arcuate, with the ninth and 

 eleventh more circular in transverse section ; eleventh about a half longer 

 than wide, obovate ; pubescence short and very inconspicuous. The 

 seventh joint tends to be slightly wider than the sixth or eighth. 



Pronotum about a third wider than long, quite evenly convex, slightly 

 more declivous antero-laterally ; apex feebly arcuate in circular arc ; sides 

 broadly arcuate, more strongly so behind the middle, less so and moder- 

 ately convergent anteriorly to apex, serrules small and inconspicuous ; 

 fimbriae moderately short, cinereous and rather close; apical angles 

 obtusely rounded ; base broadly arcuate and rather feebly sinuate within 

 the very obtuse basal angles, which are as a rule rather, broadly rounded ; 

 disk widest just behind the middle, rather coarsely and densely indentato- 

 punctate. 



Elytra oblong, twice as long as wide, sides parallel ; disk rather 

 closely and regularly punctate, punctures separated by a distance equal to 

 their diameter, finer and sparser apically ; surface very finely micro- 

 scopically rugulose ; apex parabolically rounded. 



Abdomen densely and finely punctate, pubescence abundant and hiding 

 the body surface; fifth ventral segment modified on the disk in the male. 



Legs moderate in length ; metafemora not swollen, subparallel. 



Male. Slightly more parallel. Fifth ventral segment distinctly 

 sinuate, bottom of the sinus transverse, angles obtuse and hidden by the 

 pubescence; adjacent surface impressed and somewhat shining, sub- 

 glabrous, hairs of the impressed area and terminal segment brownish 

 black, longer and not noticeably bristling, pubescence beyond impressed 

 area normal. Abdomen but very slightly longer than a femur. 



Female. Slightly stouter, sides of the body rather more arcuate. 

 Abdomen about twice as long as a femur ; fifth ventral rather strongly 

 rounded at apex and less broadly so than in some of the other species. 



Measurements. Length (Types), 3.5-4.0 mm.; width, 1.2-1.4 mm. 



Holotype, male, in my own collection ; allotype, female, in the collec- 

 tion of the California Academy of Sciences ; paratypes in both collections. 



Type locality. Hullville, Gravelly Valley, Lake County, California. 

 Collected by myself on June 18, 1917. Found abundantly on the catkins 

 of the willow. 



