40 THOS. L. CASEY. 



of head ; sides evenly and moderately arcuate throughout ; disk very convex, 

 strongly and rather closely punctured, punctures very Evenly distributed, 

 distant generally by nearly twice their own widths, deeply impressed. 

 Scutellum very small, sides short and nearly parallel, broadly angulate 

 behind. Elytra at base as wide as the pronotum ; sides parallel and rather 

 strongly arcuate ; together acutely rounded behind ; disk about two and 

 one-half times as long as the pronotum, very strongly convex and having 

 tliree systems of sculpture combined : first, striae of small, deeply impressed 

 punctures, with smaller impressed punctures scattered sparsely and without 

 order over the intervals ; second, a very minute and even granulation over 

 the entire surface; third, a system of very irregular, feebly impressed, and 

 somewhat transversely arranged creases. Under surface of the abdomen 

 irregularly and distantly punctate, punctures round and rather feebly im- 

 pressed ; prosternum finely and transversely rugnlose. Legs moderate, femora 

 flattened ; first joint of the posterior tarsi longer than the next two together, 

 very slightly shorter, though more robust than tlie last joint. Length 

 4.6—5.6 mm. 



San Diego, California. 



This species seems to be rather abundant. 



COMOXTIS. 



C. elliptica n. sp. — Form moderately robust, sides parallel ; upper 

 surface glabrous, with exception of a few excessively minute setae near the 

 border of the elytra ; black throughout, elytra slightly more lustrous than 

 the pronotiam. Head broader than long, sub-triangular, minutely and rather 

 closely punctured, punctures increasing in density to within a short distance 

 of the anterior margin ; epistoma broadly and evenly emarginate anteriorly, 

 epistomatic suture distinct; labrum strongly emarginate in the middle ante- 

 riorly, lobes evenly rounded ; antennae three-fourths as long as the pronotum, 

 slender, filiform, second joint scarcely one-half as long as the third, joints 

 four to ten sub-equal, shorter, last joint still shorter; mentum broadly and 

 deeply emarginate. Prothorax at base two and three-fourths times, as wide 

 as the head ; sides just perceptibly convergent and nearly straight for three- 

 fourths the length from the basal angles, then rather abruptly and strongly 

 rounded to the apical angles ; apex broadly emarginate, base transverse, 

 broadly and feebly sinuate toward the basal angles, the latter rather promi- 

 nent and acutely rounded ; anterior angles acute, narrowly rounded ; disk 

 two-thirds wider than long, strongly and evenly convex, minutely and dis- 

 tantly punctate, the jmnctures becoming very slightly closer toward the 

 sides ; very minutely and conspicuously granulated ; pronotum narrowly 

 rortexed at the sides, narrowly margined anteriorly, edges strongly rounded ; 

 surface not margined jiosteriorly. Scutellum triangular, broader than long. 

 Klytra as wide as the prothorax ; sides parallel and nearly straight for two- 

 thirds the length jmsteriorly ; disk very convex, acutely rounded behind, 

 two and one-half times as long as the pronotum ; surface minutely rngulose 

 or undulated, granulations rather indistinct, punctures minute, strong, 

 evenly distributed, coarser, and more distant than those of the pronotum, 



