Coleopterological Notices, V. 395 



generally more or less infumate toward base. Head in the male 

 nearly as wide as the prothorax, obsoletely trisnlcate, the eyes at 

 their own length from the basal angles, the tempora slightly 

 divergent behind them and a little more prominent. Prothorax 

 trisulcate, the median sulcus deep and narrow, the lateral broad 

 and very feeble, also broadly impressed toward the sides. Elytra 

 a little wider and distinctly longer than the prothorax. Length 

 2.1-2.9 mm.; width 0.6 mm. Pacific Coast and Siberia to Western 

 Europe. 



The male seems to be much less abundant than the female and 

 has rather feeble sexual modifications, the sixth ventral plate being 

 broadly and just visibly sinuate toward the middle, and the seventh 

 moderately bisinuate. The groove of the mentum is feebly arcuate, 

 very deep and somewhat uneven. A male which I took in the Sta. 

 Clara Valley, California, has longer elytra, at least one-half longer 

 than the prothorax, but does not differ much otherwise. 



According to Mr. Fauvel the Mexican rugulosus of Say and car- 

 bonellus Solksy, are identical. 



O. suspectlis n. sp.— 0. nitidulus Lee. nee Grav. : Trans. Am. Ent. Soc., 

 VI, p. 237. — Parallel, polished, blaik, the elytra and legs pale brownish- 

 testaceous ; antennae piceous toward base ; integuments glabrous ; the venter 

 remotely, coarsely pubescent. Head very nearly as wide as the prothorax, 

 slightly wider than long, coarsely, closely punctate laterally, finely, feebly 

 so toward the middle, the subquadrate clypeus convex and scarcely at all 

 punctured, finely impressed along the middle posteriorly to the base and with 

 two distant impressions at the base of the occiput ; eyes moderate, at their 

 own length from the basal angles, the latter broadly rounded to the neck, a 

 little more prominent than the eyes ; neck two-thirds as wide as the head ; 

 antennae as long as the head and prothorax, rather strongly incrassate and 

 perfoliate, the tenth joint not quite twice as wide as long, eleventh small, 

 conoidal, not as wide as the tenth and shorter than the two preceding. Pro- 

 thorax strongly, closely, somewhat longitudinally punctate, three-fourths wider 

 than long, widest at apical third ; sides evenly rounded anteriorly, becoming 

 gradually distinctly convergent and straight behind, the basal angles obtuse 

 but distinct ; base feebly arcuate, narrower than the subtruncate apex ; disk 

 trisulcate, the median sulcus deep and distinct, the lateral broad and feeble, 

 also impressed toward the sides. Elytra a little wider and longer than the 

 prothorax, transverse, flat, the sides feebly divergent ; humeri exposed ; disk 

 of each very broadly, feebly impressed along the middle ; punctures strong 

 but rather fine, longitudinally confluent, separated by fine close anastomosing 

 rugae. Abdomen slightly narrower than the elytra, parallel, polished. Length 

 1.6-2.0 mm. ; width 0.5-0.55 mm. 



