310 CALIFORNIA ACADEMY OF SCIENCES. 



toward the base which is strongly and evenly arcuate; sides strong'y arcuate 

 anteriorly; apex truncate; apical angles uarrowly rounded, basal obsolete; 

 disk feebly convex, rather finely, evenly and somewhat sparsely punctate; 

 punctures very feebly impressed. Elytra at the humeri slightly narrower 

 than the pronotnm; sides rather strongly divergent and arcuate; together 

 transversely truncate behind and feebly simnte near the suture; outer apical 

 angles broadly rounded; disk one-h At wider than long distinctly shorter 

 than the pronotum, flat; inner apical angles deflexed slightly, punctured like 

 the pronotum but slightly more densely. Abdomen at b*se nearly as wide 

 as the elytra; sides feebly convergent toward the apex and very feebly arcuate; 

 border narrow but very deep, vertical; surface rather finely and moderately 

 densely, asperately and rather feebly punctate, impuuctate at the bases of 

 the segments. Legs rather long and slender; middle and posterior tibne 

 deusely clothed with short, fulvous, spinous set;e toward the tips; first 

 joint of the posterior tarsi nearly as long as the next two together, scarcely 

 as long as the fifth; joints two to four equal. Length 9.0-10.0 mm. 



California (San Diego, '2). 



The antenna are moderately robust and incrassate toward 

 tip where they are strongly compressed; the penultimate 

 joint viewed on the narrow side is very slightly wider than 

 long: viewed, however, on the compressed side it is nearly 

 one-half wider than long. This species differs from 31. valida 

 Lee. by its black elytra and more slender form, and from 

 opacella Sharp, by its much more transverse prothorax, in 

 which also the basal angles are obsolete. The description 

 is taken from the male, in which the seventh dorsal plate is 

 armed as usual with six porrected teeth, the middle four 

 being robust, the lateral ones much more slender and 

 slightly shorter; all are directed inward toward the apices, 

 but more strongly so in the outer teeth. 



0XYP0DA Mann. v 



0. insignis n - sp. — Depressed; rather robust; sides parallel. Body dark 

 piceous-brown; abdomen darker, nearly black; legs slightly paler, brown; 

 anteunas black, basal joint p : ceo-testaceous; surface shining; pubescence 

 fine, rather long, closely recumbent, sparse. Head deflexed, slightly longer 

 than wide; front broadly convex, finely, very feebly and sparsely punctate; 

 eyes not prominent; au'emut) very slender, as long as the prothorax and 

 elytra together; basal joint more than twice as long as wide, sub-cylindrical, 

 much shorter than the next two together, second slightly shorter than the 



