38 Nearktische Region. America. 



species in tliis difficult genus, as thcre is another species represented 

 in niy cabinet alliedtotristis but havingmuchlargereyes. (NachCasey.) 



Serica porcula Casey. 

 Contributions of the Colcopt. of N. America. Part II 1884, p. 177. 



(Erschien 1885). 



About twice as long as wide, sub-cylindrical, dark reddish- 

 brown, legs and under surface slightly paler; shining throughout, not 

 iridescent; glabrous above. Head but slightly wider than long; 

 occiput rather sparsely finely and irregularly punctate; clypeus very 

 densely and confluently so, the latter two-thirds wider than long, 

 sides rather strongly convergent anteriorly and strongly arcuate, 

 apical margin strongly sinuate, edges reflexed, scarcely more strongly 

 so anteriorly than along the sides; eyes small, not prominent; last 

 Joint of the maxillary palpi equal in length to the first three 

 together; third Joint of the antennae scarcely more than two-thirds 

 as long as the fourth, üfth twice as long as the sixth, conical, irre- 

 gularly hoppershaped. Prothorax twice as wide as long, sides 

 slightly convergent from base to apex and moderately arcuate, 

 straight toward the basal angles which are narrowly rounded; apex 

 slightly more than two-thirds as long as the base, broadly and not 

 strongly emarginate, bottom of the emargination broadly arcuate; 

 base broadly arcuate, very feebly sinuate at each side of the niiddle; 

 disk moderately convex, polished, finely and somewhat irregularly 

 punctate, narrowly impunctate along the middle. Scutellum as wide 

 as long, triangulär, acutely rounded at tip, punctate except broadly 

 along the middle. Elytra at base as wide as the pronotum, widest 

 at two-thirds the length from the base; sides very feebly arcuate; 

 together abruptly and very obtusely rounded behind; disk convex, 

 very slightly more than one-half longer than wide, about three times 

 as long as the pronotum ; longitudinal costae very feeble, broadly 

 convex, impunctate, polished, intervals much narrower, finely and very 

 irregularly punctate; punctures round, rather feebly impressed. 

 Under surface somewhat finely, sparsely, and irregularly punctate 

 throughout; legs slender; first Joint of the posterior tarsi very 

 slightly longer than se second; claws long an slender, deeply and 

 very narrowly cleft at tip,. teeth of about equal length, the outer 

 very fine and acute, straight near the tip, the inner robust, obliquely 

 acuminate at tip. Length 7,0 mm. 



Arizona (Morrison), 2. 



The usual rows of setae along the lateral edges of the pronotum 

 and elytra are present. The relative length of the third antenna^ 

 Joint may suffice to create a division in the genus. (Nach Casey.) 



