212 MEMOIRS ON THE COLEOPTERA 



long as the body; prothorax distinctly elongate, subcylindric, but 

 very little narrower at apex than at base, moderately biconstricted, 

 the lateral tubercles obtusely rounded; punctures small but strong, 

 very dense, the sulcus obsolete, the pubescence long, rather dense 

 but not quite concealing the surface sculpture; elytra fully two-thirds 

 wider than the prothorax and not distinctly more than three times 

 as long, very rapidly tapering from the prominent though rounded 

 humeri to the apex, finely, rather closely punctate, except laterally, 

 more sparsely basally and with numerous rather coarse and widely 

 scattered punctures throughout, though especially toward base and 

 closer on the flanks; pubescence golden-cinereous, short, not very 

 dense, largely absent laterally. Male with the abdomen moderately 

 narrow, slightly tapering, clothed not very densely with distinct 

 pale pubescence; dorsal pygidium obtusely rounded, the surface 

 finely, not very densely punctate, with the median line feebly carini- 

 form, nearly flat elsewhere. Length (cf) 11.5 mm.; width 3.6 mm. 

 California (locality not recorded) rufipennis n. sp. 



Form slightly more slender than in rufipennis, a little smaller in size 

 but similar in coloration, except that the legs and antennae are dark 

 rufo-piceous, the basal joint of the latter black; head nearly similar, 

 the antennae (cf ) nearly similar but rather more tapering distally, 

 or ( 9 ) much shorter and more slender than in the male, three- 

 fifths as long as the body; prothorax narrower, still more elongate 

 and barely at all narrower at apex than at base, similarly sculptured 

 but with the pubescence much less abundant and shorter; scutellum 

 narrower; elytra shorter, three-fourths wider than the prothorax 

 and three times as long, the short pubescence nearly similar, the 

 sculpture finer, the intermingled larger punctures less evident, almost 

 wanting in the female, which also has numerous fine punctures, as 

 well as larger, on the flanks; abdomen rufous in both sexes, blackish 

 laterally toward base in the female; dorsal pygidium (cf) finely, 

 sparsely punctate, without trace of a fine axial carinule, but with 

 an elongate tubercle near each side; last dorsal ( 9 ) broadly rounded, 

 more transverse medially at apex but without medial sinus or emar- 

 gination, the last ventral broadly rounded, feebly impressed medially 

 near the apex. Length (cf 9 ) 10.5-12.0 mm.; width 2.9-3.4 mm - 

 California (locality not recorded) flaccidus n. sp. 



II Last dorsal (9) narrow, gradually and arcuately tapering to the 

 narrowly bilobed apex, the median notch deep, subparallel, rounded 

 at the bottom and slightly deeper than wide. Body rather slender, 

 black, the elytra pale brownish-yellow, the abdomen ( 9 ) rufous, 

 with the two basal segments wholly or in part blackish; legs more 

 or less pale piceo-testaceous, the antennae pale, with the basal joint 

 black; head densely punctate, the eyes small but rather prominent, 

 the front closely pubescent, striate medially; antennae (cf) moder- 

 ately thick, not quite as long as the body, or ( 9 ) a little thinner 

 and three-fifths as long as the body; prothorax elongate, distinctly 

 narrower at apex than at base, strongly biconstricted, minutely 

 and very densely punctate, broadly, feebly impressed along the 

 middle and with long and very dense golden pubescence, forming 



