io MEMOIRS ON THE COLEOPTERA 



lateral seta, the median groove deep, not attaining the apex; basal foveae 

 elongate, deep, the angles finely but distinctly carinate; elytra one-half 

 longer than wide and one-half wider than the prothorax, rather widest 

 near basal third, oblong, rounded in rapidly at the sides basally, obtuse 

 at apex, with nearly straight sides medially, polished throughout, the 

 striae but slightly irregular, the inner four rather finely, the outer four 

 very coarsely punctate, becoming finely so posteriorly; third interval 

 much the widest, the metallic green areas unimpressed, though deeply 

 so at and behind the dorsal foveae; suture deeply impressed behind the 

 scutellum in the type. Length (cf) 5.0 mm.; width 2.3 mm. Cali- 

 fornia. Levette collection. 



The male type of this species, when compared with the same sex 

 of hesperium, can be observed readily to be larger, very much stouter 

 and more convex, more uniform in coloration, with longer, rather 

 more distinct thoracic carinse and broader, more convex, subbasally 

 inflated elytra, on which the punctures of the outer striae basally are 

 still coarser. The two basal joints of the male anterior tarsi are 

 similarly acutely prolonged at apex internally, but both joints are 

 larger and more elongate in binarium than in hesperium. Of the 

 latter I have a typical specimen from Washington State and four 

 which I took in Humboldt Co., California; it is the most brightly 

 colored species of the subgenus. j|gj 



Punctatostriatum belongs really with the coxendix section of this 

 subgenus, the long mentum-tooth being nearly similar to that of 

 confusum Hayw., but each of the dorsal punctures has an attendant 

 small unimpressed metallic-green spot, seeming at first glance to 

 affiliate it with the litorale section. 



The species of the coxendix section are rather numerous, a brief 

 index table of those at hand being expressible as follows. I do not 

 have carinatum or bowditchi, of LeConte, or cenulum Hayw., at 

 present: 



Pronotum without trace of medio-lateral seta; mentum tooth rather small, 



triangular and acute unicum nov. 



Pronotum with a distinct medio-lateral seta 2 



2 Mentum tooth long, convex, feebly tapering, with truncate apex. . .3 



Mentum tooth very moderate in size, triangular 4 



3 Strial punctures rounded as usual; body black, with metallic under 

 surface, the upper bright aeneous, the elytra in great part testaceous, 

 convex, the striae more or less metallic green; legs testaceous 



throughout confusum Hayw. 



A General structure and coloration as in confusum but larger, more 

 elongate and somewhat more convex, the prothorax still less ab- 



