52 MEMOIRS ON THE COLEOPTERA. 



The slender, feebly subfusoid form and rather strong close punc- 

 tures of both the pronotum and elytra, will serve to identify this 

 species very readily. 



Oxypoda lividula n. sp. Form nearly as in the preceding but more 

 uniformly dark piceous-brown, the abdomen blackish, except basally 

 and apically; surface rather more shining, the punctures less close and 

 rather coarser, more rugose on the elytra, very fine and well separated 

 on the abdomen; head smaller, nearly as long as wide, slightly more than 

 half as wide as the prothorax, the eyes nearly similar but less convex; 

 antennae blackish, slightly paler basally, rather short, distinctly and 

 somewhat rapidly incrassate, the second joint but little longer than the 

 first though rather longer than the next two combined, the fourth dis- 

 tinctly transverse, fourth to tenth increasing greatly in size but mutually 

 subsimilar in form, the outer still more strongly transverse, the last 

 large, obtusely rounded at tip and nearly as long as the three preceding; 

 prothorax nearly similar, except that the moderately converging sides 

 from base to apex are much more strongly arcuate and the color darker; 

 elytra similar but more elongate, nearly as long as wide and paler in color, 

 the suture a third longer than the prothorax; abdomen similar though 

 not quite so slender and with still finer lateral margins, at base not so 

 markedly narrower than the elytra. Length 1.73 mm.; width 0.43 mm. 

 California (San Mateo Co.), Baker. 



Though evidently allied to the last, this species is distinguishable 

 by its more uniform coloration, smaller head, more strongly and 

 rapidly incrassate antennae, with shorter fourth and very much 

 longer and more cylindrical eleventh joint and by other features as 

 stated above. 



Oxypoda effeta n. sp. Slender, fusoid and convex, rather shining, the 

 head and abdomen black, the segmental apices and abdominal apex pale; 

 prothorax piceo-testaceous, the elytra darker; punctures of the former 

 fine, well separated and scarcely asperulate, those of the latter stronger 

 though scarcely closer and evidently asperate, of the abdomen fine and 

 close throughout, with the sculpture finely imbricate; pubescence fine, 

 abundant; head but little wider than long, fully three-fifths as wide as 

 the prothorax, the eyes rather small, slightly convex, at fully their own 

 length from the base; antennae piceous-brown throughout, rather strongly 

 incrassate distally, the second joint not as long as the next two, the fourth 

 nearly as long as wide, the outer joints about one-half wider than long, 

 the last as long as the two preceding, obtuse and compressed at apex; 

 prothorax not quite one-half wider than long, rounded at base, the sides 

 moderately arcuate and converging from base to apex; elytra distinctly 

 shorter than wide, the sides but feebly diverging and just visibly arcuate, 

 at base fully as wide as the prothorax, the suture scarcely a fourth longer, 

 the sinuses distinct; abdomen at base not evidently narrower than the 

 elytra, thence slightly tapering to the fifth tergite, which is strongly 



