104 MEMOIRS ON THE COLEOPTERA 



enth stria similar to the others, as usual in this group; foveae before 

 basal and behind apical third, much more widely separated than in 

 operosum. Length (icf, 79) 4.5-5.2 mm.; width 1.7-2.0 mm. 

 California (San Francisco and northward along the coast). [ Nota- 

 phns flammnlipennis Mots.] indistinctum Dej. 



Body much smaller in size 29 



29 Head smaller, with less prominent eyes, not as wide as an elytron, 

 the elytra without obvious basal pale spot. Form oblong-oval, 

 more convex than usual, black, the anterior parts subopaque and 

 with feeble olivaceous lustre; elytra black, each with a transverse 

 fascia of pale lines near basal and apical third, the anterior broad 

 at the margin and rapidly attenuated inwardly, the posterior oblique, 

 not reaching the suture; third interval with two pale spots before 

 and behind basal third, the extreme apex also pale: under surface 

 black, the legs and epipleura pale; head nearly four-fifths as wide 

 as the prothorax, with somewhat broad and deep sulci; antennae 

 black, rufous beneath at base, three-fourths as long as the elytra, 

 the medial joints barely twice as long as wide; prothorax rather small, 

 nearly one-half wider than long, widest barely before the middle, 

 the sides broadly, subevenly rounded, oblique and feebly sinuate 

 basally, finely reflexed; surface nearly smooth, dull, the impressions 

 subobsolete, the stria fine, not quite entire; foveae rugose, rather 

 broadly impressed, oval, moderately deep, the carina rather short, 

 equal to the fovea, distinct; elytra less than one-half longer than 

 wide, nearly one-half wider than the prothorax, "circularly obtuse 

 at tip, the parallel sides broadly arcuate; strife rather fine, feebly 

 impressed, the punctures minute, obsolete near posterior third; 

 foveae near basal and apical third. Length (9 ) 3.2 mm.; width 1.3 

 mm. Oregon (Corvallis). Moznette, 1909 debiliceps n. sp. 



Head larger, very well developed, with notably prominent eyes, fully as 

 wide as an elytron; elytra always with pale basal spots 30 



30 Form moderately elongate, suboval, slightly convex, colored nearly 

 as in the preceding, but less deep black and with rather more aeneous 

 lustre; elytra with sharply marked maculation of short lines, forming 

 two fasciae and a pale apex, more developed than in the preceding 

 but in general similar, excepting the distinct pale basal spot; head 

 nearly four-fifths as wide as the prothorax, with distinct sulci; an- 

 tennae nearly similar but longer, slender, the medial joints more than 

 twice as long as wide; prothorax broader, fully one-half wider than 

 long, otherwise much as in debiliceps, though less convex as a rule; 

 elytra similar but more elongate, somewhat more than one-half 

 longer than wide, and only two-fifths wider than the prothorax, 

 the striae not very fine and slightly impressed, the punctures dis- 

 tinct basally, rapidly disappearing behind the middle, the foveae 

 slightly before basal and near apical third, the third interval dis- 

 tinctly wider than the others. Length (cf 9 ) 3-0-3.7 mm.; width 

 1.2-1.3 mm. California (San Jose, Mt. Diablo and Sonoma Co.). 

 [Ochthedromus tessellatus \ Lee. San Diego; Bemb. xanthostictum 

 G. & H.] conspersum Chd. 



Form broader and slightly larger, moderately convex, the anterior parts 



