I2O MEMOIRS ON THE COLEOPTERA 



the outer wanting, the intervening surface flat; elytra oblong-oval, 

 strongly convex, only about three-fifths longer than wide and a third 

 wider than the prothorax; sides parallel, feebly arcuate to the distinct 

 humeral denticle, the lateral margins unusually broadly concave 

 and reflexed; striae fine but cleft-like, slightly but unevenly punc- 

 tulate, the intervals flat; male with the, in some form frequently 

 observed, feeble transverse division of the last abdominal segment 

 near the apex, the under surface throughout very polished; tarsi 

 rather long. Length (cf 9 ) 15.5-16.2 mm.; width 5.4-6.1 mm. 

 California (Sta. Barbara), Dunn canallatus n. sp. 



Body rather more elongate, very convex, deep and rather opaque black; 

 head smaller than in the preceding, not three-fifths as wide as the 

 prothorax, the impressions deep and conspicuous, subparallel; 

 prothorax as long as wide, formed throughout nearly as in the pre- 

 ceding, except that the surface is more steeply declivous toward the 

 side margins, which are more concave along the reflexed beading, 

 and that the inner impression is very feeble and diffuse; elytra more 

 elongate and more oval, very convex, a third to two-fifths wider 

 than the prothorax, the sides more arcuate, the apex broadly rounded, 

 a little more than one-half to three-fifths longer than wide, the sides 

 moderately widely concave and reflexed. the humeral denticle strong; 

 striae rather fine but unusually impressed, evidently crenulo- 

 punctulate toward the sides, the intervals very convex, more feebly 

 suturad; legs moderate; prosternal process not margined laterally 

 but truncate and moderately margined at apex as usual in related 

 species. Length (cf 9 ) 15.0-17.5 mm.; width 5.6-6.6 mm. Cali- 

 fornia (Los Angeles and near Col ton), [illustris Lee.] 



congestus Mn. 



7 Elytra shorter, the prothorax larger, only very slightly narrower than 

 the elytra; lustre more shining. Body subparallel, moderately con- 

 vex, polished, black with piceous tinge, the elytra not alutaceous 

 in the male; under surface and legs rufo-piceous, the latter testaceous 

 distally; head moderate, nearly two-thirds as wide as the prothorax, 

 the impressions fine, arcuate and diverging; prothorax about as 

 long as wide, the sides rounded almost to the base, where they become 

 feebly and briefly sinuate just before the angles, which are nearly 

 right but rather blunt; base distinctly sinuate in about median third, 

 thence margined to the sides, almost four-fifths the maximum width; 

 surface convex, steeply declivous to the fine elevated marginal bead 

 throughout, the inner impression moderately long and deep, the 

 surface thence flattened near the base to a very small and feeble 

 basal elevation near the angle; median stria fine but distinct; elytra 

 three-fourths longer than wide, oblong-oval, with feebly arcuate sides 

 and very feeble humeral denticle, strongly rounded at apex, the 

 striae impunctate, the intervals rather strongly convex throughout; 

 scutellar stria long, forming the basal part of the first stria very 

 evenly and without trace of junction, the base of the latter detached; 

 legs moderately short. Length (cf) 13.7 mm.; width 4.5 mm. 

 California (Mt. Diablo) diabolus n. sp. 



Elytra more elongate, more broadly oval in panticulatus ; prothorax 



