COLEOPTERA. 137 



examined from tlie United States, the antennae are rather strongly 

 geniculate and not straight as stated in the " Classification of the 

 Coleoptera of North America." 



O. picipes n. sp. — Slender, depressed. Color throughout piceous- 

 black ; tarsi paler, testaceous ; antennae dark blackish-fuscous toward base, 

 palpi same; integuments iinpunctate, finely evenly and strongly' alutaceous 

 throughout every portion of the body, granulation coarser on the elytra and 

 abdomen ; pubescence of head and ijronotum very tine, sparse and incon- 

 spicuous, that of the elytra much more dense, tliat of the abdomen very dense, 

 short, fine, recumbent, cinereous, conspicuous. Head rather large ; sides 

 behind the eyes parallel and nearly straight ; base transversely truncate ; 

 posterior angles rather narrowly rounded ; eyes rather large, very coarsely 

 granulated, at more than their own length from the base, somewhat promi- 

 nent ; interocular surface rather strongly convex, narrowly rounded ante- 

 riorly ; antennal tuberculations small and prominent, intermediate surface 

 flat ; labrum transverse, very strongly ridged longitudinally, middle teeth 

 rather long and prominent ; antennae slightly shorter than the head and 

 prothorax together, strongly geniculate, slender, tip of apical joint paler, 

 basal joint robust, snb-cylindrical, two and one-half times as long as wide, 

 very slightly longer than the next two together, second slender, very slightly 

 longer than the third, joints four to ten sub-moniliform, nearly equal in 

 length, increasing very slightly in width ; third joint of maxillary palpi 

 longer than the second, more than twice as thick, very robust, obtusely 

 rounded at tip, fourth not visible. Prothorax slightly longer and very 

 slightly narrower than the head ; sides parallel and very feebly arcuate, 

 strongly convergent in the anterior fifth and nearly straight to the neck 

 which is very slender and scarcely one-fifth as wide as the head ; base 

 broadly and very feebly arcuate ; basal angles rather broadly rounded ; disk 

 rather strongly convex, much less so than the head, nearly one-third longer 

 than wide. Elytra very slightly wider than the head ; sides parallel, slightly 

 arcuate, more strongly so near the apical angles ; together broadly roundly 

 and rather feebly emarginate behind ; disk much longer than the ijronotum, 

 one-third longer than wide. Scutellum very small, semi-circular in outline. 

 Abdomen at base very slightly narrower than the elytra ; sides of the first 

 four segments gradually divergent and straight ; border strong, inclined, 

 equal ; fifth segment nearly as long as the two preceding together, sixth 

 short. Legs rather short ; femora swollen, upper edges rounded, strongly 

 arcuate, slightly paler toward tip ; tibiae slightly swollen toward tip ; tarsi 

 rather robust, first four joints of the anterior slightly dilated and spongy- 

 pubescent beneath. 



Male. — Fifth ventral segment very broadly and feebly sinuate througliout 

 its width at apex ; sixth emarginate at tip, notch more than twice as wide as 

 deep, narrowly rounded at the bottom, sides feebly arcuate, apices angulate ; 

 seventh narrow, minutely emarginate at tip. 



Female. — Body slightly wider ; anterior and middle legs paler ; sixth ven- 

 tral segment angularly rounded behind. 



Length 2.3-2.5 mm. 



