296 MEMOIRS ON THE COLEOPTERA 



the pronotal punctures are confined to the foveal region, in one speci- 

 men they are extended forward broadly and loosely near the sides 

 to the apex; generally there is no trace of this singular character. 

 The male type of tarsalis differs from all the other San Diego males 

 in its larger size, more elongate form, thicker tarsi and perfectly 

 flat strial intervals. 



Group II 



This group includes virtually all of our species, only basillaris and 

 the small preceding group being incompatible. They are extremely 

 difficult to define in such a way as to be surely identifiable, espe- 

 cially in view of their considerable number, but so far as I am able 

 to determine, they may be separated by the following characters: 



Elytra with an ocellate subscutellar puncture, forming the anterior end of 

 the scutellar stria 2 



Elytra without trace of an ocellate subscutellar puncture II 



2 Sides of the prothorax evenly converging and very evenly arcuate 

 from base to apex; third antennal joint without distinct carina.. . .3 



Sides always more rounding and convergent apically than basally; third 

 antennal joint with more or less evident subbasal carination 5 



3 Antennae ( 9 ) notably stout, piceous, slender and pale basally. Form 

 regularly oblong-oval, convex, shining, with pronounced bronzy- 

 aeneous lustre; elytra not distinctly alutaceous in the female, though 

 less polished; under surface and epipleura obscure rufous, the meta- 

 sternum, its episterna, and the abdomen, deep black; legs obscure 

 rufous, the femora blackish; head distinctly less than half as wide as 

 the prothorax, the eyes well developed but only slightly prominent; 

 antennae much shorter than the thoracic width; prothorax one-half 

 wider than long, the apex sinuate, with moderately blunt angles, 

 four-sevenths as wide as the base; evenly converging sides rather 

 strongly, evenly arcuate; foveae impunctate, the inner linear but 

 very feeble, the outer rounded, feebly impressed, far from the sides 

 and nearly as far from the base; basal angles right, narrowly rounded, 

 the puncture much further from side than base; elytra two-fifths 

 longer than wide, as wide as the prothorax, gradually ogival from 

 about the middle; striae rather fine, impressed suturally, strongly 

 toward tip, impunctate, the scutellar oblique, free or not behind; 

 lateral series not interrupted; intervals, except apically, nearly flat. 

 Length (9) 8.0 mm.; width 3.5 mm. New York (Willets Point, 

 Long Island) arcuata n. sp. 



Antennae very slender in both sexes and much less compressed, about as 

 long as the thoracic width; converging sides of the prothorax from 

 base to apex very feebly but evenly arcuate 4 



4 Body smaller, more narrowly oval, the subapical sinus of the elytra 

 shallow and inconspicuous; color black, but usually with moderate 

 aeneous lustre, black beneath and somewhat greenish; legs dark 



