146 NEW SPECIES MELYRIDAE, CHRYSOMELIDAE AND TENEBRIONIDAE 



a slight convexity at middle against the frontal suture ; punctures rather 

 small and sparse, slightly denser at the periphery ; eyes relatively large, 

 rather finely faceted, and moderately prominent. Antennae rather slen- 

 der, last three joints rather heavy and not compressed ; third joint rather 

 slender and subcylindrical, fourth and fifth subangulate anteriorly, fifth 

 slightly wider than the following three joints ; sixth, seventh and eighth 

 subequal ; ninth and tenth about as long as wide and thicker ; eleventh 

 nearly as long as the preceding two taken together and pointed obovate. 



Pronotum about a fourth wider than long, evenly and rather strongly 

 convex from side to side, very feebly so antero-posteriorly ; apex very 

 feebly arcuate in circular arc, angles obtusely rounded; sides feebly 

 arcuate, moderately converging toward apex, almost broadly and feebly 

 sinuate adjacent to the angles, serrules small and acute, fimbriae moder- 

 ately short, even and not dense ; basal angles obtuse and rather distinct ; 

 base broadly and slightly arcuate ; disk sparsely punctate in central third, 

 punctures moderately small, separated by at least one or three times their 

 diameter, intervals flat and smooth, rather strongly indentato-punctate in 

 lateral thirds. 



Elytra oblong, rather less than twice as long as wide ; sides feebly 

 arcuate and parallel, rather broadly rounded at apex; punctures rather 

 sparse, at base equal in size to those of the pronotum, finer apically, sur- 

 face slightly and sparsely rugose. 



Abdomen finely and sparsely punctate, surface rather shining. Fifth 

 ventral segment unmodified in the male. 



Legs moderate in length ; metafemora not in the least constricted 

 behind and adjacent to the trochanters. 



Male. Narrower and oblong. Fifth ventral segment truncate at 

 apex. 



Female. Slightly broader, more oblong-oval. Fifth ventral sub- 

 angulate at apex and obliquely arcuate laterally. 



Measurements. Length (Types), 2.3-2.4 mm.; width, .9-1 mm. 



Holotype, male, in the author's collection. 



Allotype, female, in the collection of the California Academy of 

 Sciences. 



Paratypes in both collections and in that of Mr. J. O. Martin, who 

 collected the species on April 13th, 1917. 



Type locality. Mecca, Colorado Desert, California. 



Distribution. r Besides the specimens from the type locality, others in 

 the Liebeck collection have been studied, these were collected in Utah. 

 They agree in every particular with the types. A series of about thirty 

 specimens have been studied. 



