378 MEMOIRS ON THE COLEOPTERA 



especially within; fovea attaining the base, which is as wide as the 

 sinuate apex; elytra two-thirds longer than wide, a fourth wider than 

 the prothorax, the striae very moderately impressed, the intervals 

 feebly convex; joints of the middle and posterior tarsi deeply sulcate 

 externally; male with one, the female with two, apical abdominal 

 punctures at each side. Length (cf 9 ) 9.5-11.5 mm.; width 3.5- 

 4.2 mm. Middle and northern California and Nevada (Reno). A 



large series lustrans Lee. 



Body nearly similar but more elongate, similar in coloration and lustre; 

 head less than three-fifths as wide as the prothorax, almost as in 

 lustrans, the antennae (cf) longer than the head and prothorax, the 

 latter not distinctly shorter than wide, somewhat more noticeably 

 so in the female; sides basally oblique but barely perceptibly sinu- 

 ate, the angles minutely sharp and subprominent; base a little wider 

 than the deeply sinuate apex in the male; foveal region strongly 

 punctate, the fovese similar; elytra longer, fully three-fourths longer 

 than wide, nearly a third wider than the prothorax; striation nearly 

 as in lustrans; anterior tarsi of the male differing greatly in being 

 black and not obscure ferruginous. Length (cf 9 ) 10.7-11.8 mm.; 

 width 4.0-4.1 mm. Oregon (Clackamas Co.). Two examples. 



atrolucens n. sp. 



The met-episterna, sides of the metasternum and latero-basal 

 parts of the abdomen, are punctate in both these species, the punc- 

 tures a little coarser in atrolucens, but, as usual, these punctures 

 are notably variable in number in different individuals. In lus- 

 trans the male is smaller than the female, but this is not noticeable 

 in atrolucens. 



Pseudargutor n. gen. 



So far as examined, literature seems to show that no distinctive 

 generic name has ever been given the remarkably isolated Feronia 

 erythropus, of Dejean. It was described under the name nitidus by 

 Kirby, and placed in Platyderus Steph., a genus of peculiarly south- 

 ern European range, and apparently assuming, in those regions, 

 very nearly the role that Loxandrus does in North America. There 

 is something about erythropus, besides the occasional feebly opal- 

 escent lustre, that reminds us of Loxandrus, but the anterior tarsi 

 of the male are perfectly symmetric. 



Micromaseus n. gen. 



The species of this genus, known to me thus far, arefemoralis Kirby 

 and desidiosus Lee., corusculus Lee. and patruelis Dej., all very small 

 species, remindful of Cryobius, but with much smaller head and dif- 



