184 Trans. Acad. Sci. of St. Louis. 
not quite so elongate; punctures of the head rather less dense; gular 
sutures as inangulata. Length 3.1 mm.; width 0.55mm. California 
(San Diego)....cesecccecccvesccce cece scvccceeceeeesCOntinens Csy. 
38 —Elytra always much longer than the prothorax.....esecesccccccceses 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. Length5.2mm.; width0.9 mm. 
California (Los Angeles Co.)...+s+eesececscecceccecessssPOllens 0. 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.....oe ..ceccescesccccsssce B 
5 — Pronotum black; species generally somewhat larger in size.......... 6 
Pronotum pale in color; species frequently very small........ceeceseoee Ll 
6 — Elytra black or blackish, paler only at tip....ccseccccevcccccrcceveee F 
Elytra pale throughout, ssc cceecsacesscceccenecesecs sade cevorens sveseelO 
7 — Head distinctly narrower than the prothorax.........eesecesecescee 8 
Head subequal in width to the prothorax or never more than just percept- 
ibDly NATTOWEL...6 seen rece ees ovens coneceneeeserveneveesine socesvcvs O 
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 
TEZIONS).wcccceescceccccecccccccsveveusesseccsevevesceese MODIS 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 head 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 puncturés 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 just visibly con- 
verging from apex to base, the apical angles well rounded; elytraa 
fourth wider and fully three-fifths longer than the prothorax. Length 
