184 Trans. Acad. Sci. of St. Louis. 



not quite so elongate; punctures of the head rather less dense; gular 

 sutures as iaangulata. Length 3.1 mm.; width 0.55 mm. California 

 (San Diego) coutiuens Csy . 



3 — Elytra always much longer than the prothorax 4 



Elytra only very slightly longer than the prothorax, not longer than wide. 13 



4 — Species very large and stout, the gular sutures broadly, feebly arcuate, 



approximate and distinctly impressed, black throughout, the legs and 

 antennae brown, the elytra pale at apex; head rather coarsely, closely 

 and normally punctate, scarcely visibly narrower than the prothorax, 

 parallel and straight at the sides, as wide as long, the basal angles un- 

 usually broadly rounded; eyes normal, at about twice their own length 

 from the base; neck rather less than two-fifths as wide as the head; 

 prothorax somewhat strongly convex, finely, feebly, rather sparsely 

 punctured and shining, a little wider than long, very slightly obtrape- 

 zoidal with the angles very broadly rounded; elytra large, quadrate, 

 a fourth to nearly a third wider than the prothorax and one-half 

 longer, very minutely, closely punctate. Sixth ventral of the male with 

 the usual broadly rounded apical sinus. Length 5.2 mm. ; width 0.9 mm. 



California (Los Angeles Co . ) pollens n. sp. 



Species moderate or small in size and of slender form, the gular sutures 

 more arcuate, more widely separated and not or scarcely at all im- 

 pressed ; elytra longer than wide, parallel 5 



5 — Pronotum black ; species generally somewhat larger in size 6 



Pronotum pale in color ; species frequently very small 11 



6 — Elytra black or blackish, paler only at tip 7 



Elytra pale throughout 10 



7 — Head distinctly narrower than the prothorax 8 



Head subequal in width to the prothorax or never more than just percept- 

 ibly narrower 9 



8 — Prothorax much wider than long, parallel and broadly, feebly arcuate 



at the sides, finely but deeply, very closely punctured and rather dull in 

 lustre, the angles moderately rounded; body much larger and distinctly 

 less slender in form; head as wide as long, parallel and straight at the 

 sides, very closely, rather coarsely punctured ; elytra large, longer than 

 wide, nearly a fourth wider and three-fifths longer than the prothorax. 

 Length 3.4-3.9 mm.; width 0.6-0.68 mm. California (middle coast 



regions) mobilis Csy. 



Prothorax only very slightly wider than long, slightly obtrapezoidal in form 

 with the anterior angles but little rounded, finely and strongly but less 

 densely punctate; body small and very slender, more parallel than in 

 mobilis, the elytra being narrower when compared with the bead and pro- 

 thorax; head rather strongly but much more sparsely punctate; elytra 

 a fifth wider and one-half longer than the prothorax. Length 3.0 mm.; 

 width 0.5 mm. California (middle coast regions) reducta Csy. 



9 — Body rather stouter, nearly as in mobilis but smaller in size and more 



shining, the punctures distinctly less dense; head as wide as long, par- 

 allel and straight at the sides, the basal angles only slightly rounded, 

 right; prothorax slightly wider than long, the sides ju-it visibly con- 

 verging from apex to base, the apical angles well rounded; elytra a 

 fourth wider and fully three-fifths longer than the prothorax. Length 



