HELOPS OBTUSANGULA 229 



Head subquadrate, front scarcely convex between the eyes, flattened 

 toward the epistoma, sides of front moderately prominent; feebly and 

 transversely constricted behind the eyes; densely, not coarsely punctate, 

 punctures more or less slightly, coalescent. Eyes slightly prominent. 

 Antennae slender, outer joints slightly compressed, last three just a little 

 wider, eleventh oval. 



Pronotum subquadrate, about a fourth wider than long ; apex almost 

 truncate, somewhat feebly arcuate centrally ; apical angles obtuse ; sides 

 feebly arcuate from apex to base, most strongly so anteriorly, less so 

 posteriorly and just the least converging, marginal bead not strong or 

 prominent; base almost truncate; basal angles obtuse and narrowly 

 rounded, scarcely distinct ; disk not strongly convex, most so anteriorly 

 and centrally at apex, there rather strongly declivous laterally, vaguely 

 and transversely impressed in front of base, surface very slightly flattened 

 in lateral fourths, densely punctate, punctures small, more or less 

 coalescent longitudinally, intervals not conspicuous. 



Pro pleura distinctly and not coarsely longitudinally rugulose ; rugulae 

 uniting to a greater or less extent, with large, shallow and scarcely distinct 

 punctures in the broad sulci between. 



Elytra elongate oval, a little more than twice as long as wide, moder- 

 ately evenly convex from side to side, a little wider than the pronotum, 

 humeri obtusely rounded, base transverse ; surface finely striate, striae not 

 noticeably punctate, intervals finely, irregularly and somewhat sparsely 

 punctate, feebly convex especially on apical declivity, there with feeble, 

 small tuberculiform eminences ; sides parallel, feebly arcuate, apex some- 

 what ogival and rather narrowly rounded. 



Abdomen shining, rather evenly and not densely nor coarsely punc- 

 tate. Legs rather short. 



Male. Narrower. Antennae elongate, joints eight to eleven inclu- 

 sive at least twice as long as wide, not incrassate, scarcely compressed. 

 Anterior tarsi feebly dilated, and with the middle tarsi quite densely 

 clothed beneath with yellow hairs. 



Female. Somewhat broader. Antennae shorter, outer four joints 

 distinctly broader, not twice as long as wide, ninth and tenth subtriangular, 

 slightly compressed. Anterior tarsi very slightly dilated. All the tarsi 

 clothed beneath with yellow hairs, denser on the anterior and middle tarsi. 



Measurements. Length (Types), 10.5-S mm.; width, 3.5-2.6 mm. 



Holotype, female, larger sex, in the collection of the California 

 Academy of Sciences. Allotype, male, and paratypes in the collection of 

 the author. 



Holotype collected by Mr. Geo. R. Wilson ; allotype and paratypes by 

 Dr. E. C. Van Dyke. 



