356 CASEY 



closely punctured, finely very densely so anteriorly, the sides con- 

 vergent and evenly though moderately arcuate, joining the episto- 

 mal margin through a pronounced though rounded angle, the 

 epistoma feebly and broadly lobed toward the middle ; prothorax 

 two-thirds wider than long, the sinuate apex narrower than the 

 base, the sides subevenly and distinctly though moderately arcuate, 

 the apical angles much deflexed, the basal very broadly obtuse but 

 not rounded, the punctures rather small but deep, moderately sepa- 

 rated, becoming slightly coarse and somewhat dense only very near 

 the sides ; scutellum moderate, transverse ; elytra three-fifths 

 longer than wide, not quite three times as long as the prothorax, 

 gradually arcuato-ogival in apical two-fifths, the sides rounding 

 toward base, the basal margin curving anteriorly toward the 

 humeri, the punctures rather small but deep, moderately close-set 

 in uneven series, the interstitial punctures fine, sparse and con- 

 fused throughout ; abdomen finely Init strongly, somewhat sparsely 

 punctate medially. Length 6.2-6.7 mm. ; width 2.4-2.7 mm. 

 California (middle coast regions) obtusus Lee. 



9 — Form oblong, parallel, moderately convex, feebly shining, strongly 

 alutaceous, dark brown in color, the legs dark rufous ; head not 

 very coarsely but deeply and very closely punctate, the sides con- 

 verging and strongly, evenly arcuate, the angles not distinct, the 

 epistoma broadly, feebly lobed, the tooth of the left mandible dis- 

 tinct, that of the right unusually large and acute ; prothorax large, 

 widest at the middle, three-fourths wider than long, the apex 

 moderately sinuate and but little narrower than the base, the sides 

 parallel, evenly and very strongly arcuate, the apical angles very 

 strongly deflexed, the basal very obtuse, with the neighboring sur- 

 face even, the punctures rather small but very deep and close-set 

 throughout, nearly even and scarcely differing in any way toward 

 the sides ; scutellum rather well developed, transverse, sparsely 

 and rather strongly punctate ; elytra three-fifths longer than wide, 

 fully three times as long as the prothorax but scarcely as wide as 

 its median width, graduall}- and rather obtusely ogival apically, 

 the sides rounding slightly basally, the basal margin only just 

 visibly flexed anteriorly toward the humeri, the punctures not very 

 coarse but deep, close-set and distinct in slightly uneven series, the 

 interstitial punctures very fine, sparse and confused throughout; 

 abdomen strongly, rather coarsely and closely punctured even 

 medially. Length 6.6 mm. ; widtla 2.45 mm. California (south- 

 ern) thoracicus Csy . 



Form, coloration and lustre nearly similar ; head similar and about as 

 wide as an elytron, but with the third antennal joint less elongate 

 and only very slightly longer than the fourth ; prothorax larger, 

 barely two-thirds wider than long, the subparallel sides veiy much 

 less strongly arcuate and becoming straight toward base, the basal 

 angles less obtuse and rendered apparently somewhat prominent by 

 reason of an oblique tumidity of the surface extending to them, and 

 not traceable in thoracicits^ the anterior angles less deflexed and 



