Coleopterological Notices, VI I. 291 



rapidly rounded to the base, whicli is coarsely and rather distinctly beaded ; 

 side margins fine and acute ; surface broadly and very feebly convex, finely 

 and feebly vermiculato-rugose and dull ; median line fine, more distinct near 

 the base. Elytra rather ventricose, oval, fully % wider than the prothorax 

 and about 2% times as long ; sides arcuate as in californicus ; punctures deep, 

 moderately coarse, isolated, closer and rather smaller near the sides and apex ; 

 foveolse not v^ell marked though visible. Length $ 17.5 mm. ; width 6.7 mm. 



California. 



The two males before me are without more accurate indication 

 of locality and represent a distinct species between californicus 

 and horni. The elytra of the two specimens differ conspicuously 

 in form, In one having the greatest width well before the middle 

 and arcuately narrowing thence to the ,apex ; in the other they 

 are widest at the middle, but there is apparently no other dis- 

 tinguishing feature. The fine side margins of the prothorax do 

 not .perfectly attain the base, and the basal angles are extremely 

 obtuse. 



O. punctif rons. — Moderately ventricose and rather feebly convex, deep 

 black, somewhat dull. Head moderate in size, rather feebly rugulose, the 

 median parts of the front sparsely punctate ; labrum bisinuate, the median 

 lobe somewhat advanced and truncate ; setigerous punctures moderate in size ; 

 antennae scarcely % ^^ long as the body, rather slender and but slightly atten- 

 uate toward apex, the basal Joint notably thicker, third and fourth joints 

 broadly constricted at the middle. Prothorax obtrapezoidal, ^g wider than 

 long, widest at apical fourth, where the sides are rounded, the latter rather 

 strongly convergent and very feebly but evenly arcuate thence to the basal 

 margin, the fine lateral margin attaining the basal bead, the latter only evident 

 toward the sides ; surface broadly and feebly convex, flattened toward the 

 middle, feebly vermiculato-rugose, the rugosities rather large ; median line 

 very fine. Elytra % longer than wide, % wider than the prothorax and 2% 

 times as long, widest at the middle ; surface moderately convex, coarsely and 

 deeply but not very closely punctate, the foveolse not conspicuous. Length 

 14.5 mm. ; width 5.5 mm. 



California. 



This species is allied somewhat to californicus but is smaller, 

 broader, more ventricose and less convex, with much feebler ru- 

 gulosity of the anterior parts of the body and a shorter and more 

 transverse prothorax. It is represented by a single female from 

 an unrecorded part of the State. 



O. coofliiens. — Eather stout and feebly convex, distinctly dull, deep 

 black. Head moderate in size, finely and feebly rugose ; median parts of the 

 front finely punctate, the impressions moderate ; labrum bisinuate, deeply 

 sexpunctate, the median lobe moderately advanced and truncate ; antennae 



