272 MEMOIRS ON THE COLEOPTERA 



obsolete; elytra very slightly wider than the prothorax, about one- 

 half longer than wide, the sides rounding in apical third; striae fine, 

 very feebly impressed, the scutellar long and free but more or less 

 disintegrated; intervals nearly flat> femora much shorter than the 

 tibiae; abdominal apex with a single puncture at each side in the 

 male, the anterior tarsi feebly dilated. Length (cf) 6.0 mm.; width 

 2.45 mm. California imitatrix Horn 



Elytral striae impunctate, or occasionally with minute and vestigial 

 punctulation 2 



2 Antennae more than usually compressed, broad, on the flat side with 

 the joints medially not more than one-half longer than wide. Form 

 shorter, oblong-suboval, convex, shining throughout, black, with 

 moderate aeneous lustre above, the thoracic margins not pale; under 

 surface greenish-black, the legs bright rufous; head three-fifths as 

 wide as the prothorax, the eyes notably feeble in convexity; strioles 

 deep, straight and oblique; antennae fuscous, paler basally, extend- 

 ing behind the thoracic base; prothorax scarcely one-half wider than 

 long, the sides subparallel in basal two-thirds, rounding and con- 

 verging apically; apex feebly sinuate, with short, clearly defined, 

 scarcely blunt angles; impressions very feeble; the only punctures 

 are fine and scattered between the foveae, the inner rather fine, deep 

 and linear, the outer small, rounded and feebly impressed; elytra 

 distinctly less than one-half longer than wide, nearly a fifth wider 

 than the prothorax, gradually ogival behind; striae fine though 

 sharply defined, impunctate, the scutellar moderately long and free, 

 disintegrated; intervals flat. Male with a very small narrow area 

 of extremely minute sparse punctulation at the centre of the pro- 

 sternum, the abdomen as in the preceding. Length (cT) 5.6 mm.; 

 width 2.4 mm. California (Monterey) rotundiceps n. sp. 



Antennae slender, normally compressed, the medial joints narrower. . . .3. 



3 Body notably small and narrowly suboval, the integuments rather 

 thin, frequently with the pronotum broadly diaphanous laterally 

 and basally. Upper surface convex, polished throughout and aenes- 

 cent in both sexes; under surface pale brown, the legs pale rufous; 

 head nearly three-fifths as wide as the prothorax, the eyes promi- 

 nent; strioles somewhat short, deep, oblique; antennae testaceous, 

 rather long, extending well behind the prothorax, the latter one-half 

 wider than long, the sides feebly arcuate, more so apically and moder- 

 ately toward base, the basal angles obtuse and rather broadly 

 rounded; margins strongly reflexed; apex much narrower than the 

 base, feebly sinuate, with narrowly blunt angles; punctures very 

 fine and sparse at the foveae, the inner of which is indefinitely im- 

 pressed and sublinear and the outer obsolete; transverse impressions 

 subobsolete; elytra one-half longer than wide and rather evidently 

 wider than the prothorax, obtusely rounded in apical third, the par- 

 allel sides broadly arcuate; striae very fine, impunctate, the scutellar 

 feeble to altogether wanting; intervals perfectly flat. Male pro- 

 sternal modifications obsolete. Length (cf 9 ) 5.3-5.4 mm.; width 

 2.2 mm. California (San Diego). Three specimens, .jacinto n. sp. 



