June, i8 9 s.] Casey : North American Coleoptera. 8$ 



prothorax, the sides nearly straight and distinctly convergent, the apex narrowly 

 rounded ; punctures rather sparse and very minute, the surface feebly rugulose. 

 LeDgih 1.3 mm.; width 0.53 mm. Louisiana (Morgan City). 



laminifrons, sp. nov. 



6 — Thoracic process of the male abruptly formed 7/ 



Thoracic process gradually formed, its sides merging gradually and obliquely into the 

 sides of the prothorax ; thoracic punctures quite dense 9 



7 — Elytral punctures rather coarse and closer ; thoracic process one-half as wide as the 

 elytra. Body rather stout, blackish, the elytra piceous ; legs and oral organs pale ; 

 lustre moderately shining ; head and eyes modera'ely developed ; clypeal process 

 very broad, only moderate in length, almost transversely truncate ; prothorax only 

 slightly wider than long, the sides parallel and broadly arcuate ; apical process 

 very broad, deeply sinuate ; punctures strong and close-set ; elytra quite distinctly 

 narrower than the prothorax and scarcely more than one-half longer ; one-half 

 longer than wide, the sides parallel ; apex broadly rounded ; surface feebly rugu- 

 lose, strongly punctured, less closely than the prothorax. Length 1.4-1.7 mm ; 

 width 0.55-0.7 mm. California (southern) grossulum, sp. nov. 



Elytral punctures fine but distinct, rather sparse, the thoracic process much less than 

 one-half as wide as tbe elytra 8 



Thoracic punctures close-set ; angles of the clypeal process scarcely at all rounded. 

 Blackish, the elytral punctures generally very feebly subserial in arrangement. 

 California (especially northern coast regions) californicum Csy. 



Thoracic punctures sparse ; angles of the clypeal process rounded. Body evenly 

 cylindric, moderately shining, more or less rufo-testacecus in color, the elytra 

 sometimes blackish toward base ; head and eyes moderate, the clypeal process 

 moderately strong, with the sides rather strongly convergent and the apex broadly 

 sinuate ; prothorax tlightly transverse, the sides parallel and almost straight, 

 rounding anteriorly, the process rather feebly developed, sinuate at apex ; elytra 

 scarcely one-half long«r than wide, as wide as the prothorax and three- fifths 

 longer, the sides parallel and straight, the apex broadly rounded ; punctures fine 

 and sparse, the surface almost smooth. Length I 2 mm. ; width 0.5 mm. Cal- 

 ifornia (Sonoma Co.)' discolor, sp. nov. 



9 — Narrowly cylindric, blackish, the el)tra rufescent at tip ; legs, trophi and antennas 

 pale ; surface moderately shining ; head well developed, the clypeus moderate 

 in length, with the sides strongl) convergent, the apex broadly sinuato- truncate 

 and the angles blunt ; piothorax but little wider than long, the sides subparallel 

 and very slightly arcuate ; process rather short, sinuate at tip ; elytra fully one- 

 half loDger than wide, as wide as the prothorax and fully three- fourths longer, 

 somewhat parabolically rounded at tip, the punctures fine but strong, but little 

 smaller than those of the prothorax and much less close-set. Length 1.1-1.3 

 mm.; width 0.4-0 5 mm. California (Los Angeles). . .convergens, sp. nov. 



10 — Moderately stout, piceous to blackish in color, with the elytra paler ; legs, trophi 

 and antennae pale, the club dusky; surface polished; head well developed, 

 broadly concave, the clypeus only moderately reflexed, the apex broadly truncate; 

 prothorax but little wider than long, the sides subparallel and broadly, distinctly- 

 arcuate ; process rather short, lamelliform, with a triangular incisure at the mid- 

 dle, the process abruptly formed ; punctures very fine and sparse ; elytra short, 



