46 MEMOIRS ON THE COLEOPTERA. 



the median line and with a distinct rounded ante-scutellar impression; 

 elytra rather transverse, with sides evidently diverging from base to 

 apex, at base equal in width to the prothorax, the suture about a fifth 

 longer, the apical sinuses rather broad and shallow though distinct; 

 abdomen equal in width to the base, but narrower than the apex, of the 

 elytra, perfectly parallel and with straight sides to the apex of the fifth 

 tergite, the latter one-half longer than the fourth, the margins noticeably 

 fine; basal joints of the hind tarsi diminishing in length gradually but 

 somewhat rapidly. Length 2.1 mm.; width 0.52 mm. California (San 

 Francisco). 



I am by no means even partially convinced that this species is an 

 Oxypoda; the joints of the anterior tarsi in the single type example 

 are unobservable and the absence of infra-lateral cephalic carinae, 

 perfectly parallel abdomen and shorter basal joint of the hind tarsi 

 are very exceptional characters for the genus Oxypoda. 



Oxypoda opica n. sp. Rather slender and only slightly convex, feebly 

 shining, the abdomen but little more so and with very minute, feeble 

 and well separated punctures thoughout, the punctures elsewhere fine, 

 close and aperulate; color deep black, the elytra and abdominal apex 

 faintly dark piceo-castaneous, the legs pale brownish-flavate; vestiture 

 very short, close but inconspicuous; head rather large, slightly wider 

 than long, feebly inflated at base, three-fourths as wide as the prothorax, 

 the eyes at barely their own length from the base, the carinse distinct 

 as usual; antennae moderate in length, very slender, scarcely at all 

 incrassate, black, the basal joint rather longer than the second, which is 

 barely at all longer than the third, the fourth and fifth each slightly 

 longer than wide, the outer joints but very little wider than long, the 

 last thin, gradually pointed, not quite as long as the two preceding; 

 prothorax one-half wider than long, the sides rather strongly converging 

 and only feebly arcuate from base to apex, the base rounded, the surface 

 unimpressed; elytra transverse, much shorter than usual in this group, 

 at base fully as wide as the prothorax, at apex a little wider, the suture 

 equal in length to the pronotum, the apical sinuses broad and shallow; 

 abdomen at base slightly narrower than the elytral base, parallel, nar- 

 rowing slightly apically. the fifth tergite a third longer than the fourth; 

 margins rather thin. Length 2.0 mm.; width 0.48 mm. California 

 (Mt. Diablo). 



This seems to be truly an Oxypoda, although I am unable to 

 observe the tarsi; but it is slightly aberrant in some directions. 



The following species is stout, rather convex, strongly tapering 

 behind and limuliform: 



Oxypoda mansueta n. sp. Densely alutaceous throughout, pale 

 red-brown, the pronotum slightly, the head much, darker, the abdomen 

 blackish, paler at tip, the legs pale; punctures and pubescence very fine 



