RUTELIN^E 93 



pubescent, as well as the lower, very coarse thoracic and cephalic 

 sculpture, complete absence of the apical and basal marginal bead of 

 the pronotum except at the sides, a very different and semicircular 

 form of clypeus, still narrower and less conspicuous intermesocoxal 

 tubercle and an almost completely obsolete cleft in the apex of the 

 larger male tarsal claws; they present an entirely different habitus 

 from Cotalpa in almost every way and obviously demand separation 

 as a distinct generic type. In addition, it should be stated that, 

 excepting a slight overlapping in the upper Sonoran region, the 

 rather numerous species occupy a geographic field, altogether 

 different from that- of Cotalpa, they being native to the Pacific 

 provinces, from Washington State and Utah southward to Guate- 

 mala. They form in fact our only Pacific representative of the 

 extensive subfamily Rutelinse, which, in some genus or other, is 

 almost completely cosmopolitan. This absence of the Rutelinae 

 from the rich and varied fauna of California is very remarkable, for 

 even these species of Pocalta are to be found only in thesemi-Sonoran 

 parts of the Pacific regions and I have no record of their occurrence 

 in the coast mountains anywhere north of Santa Barbara. Cali- 

 fornia is also exceedingly poor in Dynastinse and Cetoniinae as well, 

 excepting a few Cyclocephalids and the genus Cremastocheilus, 

 facts which are still more unaccountable. The species of Pocalta 

 occurring north of the Mexican boundary, may be known as follows: 



Legs testaceous, with barely visible metallic lustre, the tarsi more obscure. 

 Body stout, oblong-oval, convex, shining, black, the anterior parts 

 above, scutellum and entire under surface with bright green metallic 

 lustre; pubescence cinereous, long, erect and bristling throughout 

 above, nowhere dense and easily removed, denser and finer on the 

 under surface, sparser on the abdomen; head half as wide as the 

 prothorax, densely and strongly punctate, the clypeus semicircular, 

 flat, with feebly and finely reflexed edges, testaceous in color and 

 without metallic lustre, the periphery finely black; prothorax less 

 than twice as wide as long, widest at the middle, where the sides are 

 strongly arcuate, gradually less so and equally converging to base 

 and apex, the apical angles prominent and sharp, much more so 

 than in any Cotalpa, the basal obtuse and slightly rounded; lateral 

 bead fine and thin, the basal thicker, broadly obsolete medially; 

 punctures very coarse, uneven and irregularly rather close or parti- 

 ally confluent, much smaller near the sides; scutellum ogival, with a 

 few widely scattered coarse punctures; elytra much wider than the 

 prothorax, very obtuse at apex, tawny to paler, flavate, sometimes 

 more or less nubilously streaked with brownish and with a few fine, 



