194 Trans. Acad. Sci. of St. Louis. 



obviously longer but scarcely thicker than the third, the two or three 

 subapical joints evidently wider than long; prothorax fully a fifth 

 wider than long, slightly wider than the head, the sides broadly rounded 

 at apical third, thence moderately converging and straight to the basal 

 angles, the surface with a small and feeble, transverse and obsoletely 

 bifoveolate impression before the scutellum; elytra distinctly trans- 

 verse, two-fifths wider and longer than the prothorax, impressed on 

 the suture just behind the scutellum, the humeri moderately exposed 

 at base; abdomen parallel, distinctly narrower than the elytra, the 

 punctures of the basal impressions rather well separated; basal joint of 

 the hind tarsi slightly shorter than the next two combined. Length 

 2.2 mm.; width 0.61 mm. California (Pomona), — H. C. Fall. 



pnnctalata n. sp. 



Form less stout, more depressed and less shining, though colored as in 

 helenae, the punctures throughout rather fine but deep and very close- 

 set, on the abdomen scarcely smaller but much less approximate, the 

 latter more shining; head moderate, slightly wider than long, flattened 

 and scarcely visibly impressed toward the middle, the antennae some- 

 what less elongate than in helenae, with the second joint evidently 

 longer and somewhat thicker than the third, the outer joints obtrape- 

 zoidal, the tenth rather distinctly wider than long; prothorax evidently 

 wider than the head, the outline nearly as in helenae, the surface very 

 finely, feebly impressed along the median line except toward tip, with a 

 short deep transverse impression before the scutellum; elytra large, 

 slightly transverse, parallel, two-fifths wider and fully one-half longer 

 than the prothorax; abdomen parallel, very distinctly narrower than 

 the elytra, the basal impressions distinctly and somewhat coarsely but 

 not very closely punctate; legs rather stout, the hind tarsi short, the 

 basal joint almost as long as the next two combined. Length 2.3 mm. ; 

 width 0.65 mm. California (Monterey Co.). [=Tachyusa creb7-. Csj.']. 



crebrepnnctata Csy. 



5 — Abdomen broad, parallel with the sides arcuate, in the middle nearly as 

 wide as the elytra. Body stout, polished, black, the elytra feebly 

 picescent, the antennae piceous, the legs pale brownish-testaceous; 

 punctures minute and only moderately close throughout, the pubescence 

 dark ashy, short, the abdominal segments each with a porrect fringe of 

 long cilia as usual; head with rather stronger punctures than elsewhere, 

 feebly fiattened, with a small deep impression at the middle, the median 

 line broadly impunctate throughout; neck rather more than two-thirds 

 as wide; second and third antennal joints equally elongate; prothorax 

 as in helenae but smaller and less transverse, not wider than the head, 

 feebly impressed along the middle basally and with a short transverse 

 impression including two large foveae before the scutellum ; elytra mod- 

 erately transverse with widely exposed humeri, fully one-half wider and 

 a third longer than the prothorax; abdominal impressions wholly Im- 

 punctate and highly polished; legs slender, the hind tarsi two-thirds as 

 long as the tibiae, the basal joint slightly shorter than the next two 

 combined. Length 2.9 mm.; width 0.8 mm. Arizona. veDtralis n. sp. 



Abdomen nearly as in ventralis. Body much smaller, moderately stout, 

 polished, blackish-piceous in color; legs pale, the antennae dark, paler 



