202 Trans. Acad. Sci. of St. Louis. 



in the unique female type, which may be somewhat immature. Length 

 2.4 mm.; width 0.52 mm. California (^Slskiyou Co.) ...sliastana n. sp. 

 18 — Form sublinear, strongly convex, somewhat alutaceous, black, the ab- 

 domen toward base dark, the legs paler, piceo-testaceous, the antennae 

 piceous; punctures small, granuliform, very close-set, less so on the 

 head and abdomen; pubescence short and not conspicuous; head small, 

 rounded, finely, linearly impressed on the median line near the middle 

 of the vertex, the eyes moderate, not prominent; antennae long and 

 stout, gradually and rather strongly incrassate distally, the first three 

 joints subequal, the second slightly the longest, the first stouter as 

 usual, the tenth about as long as wide; prothorax large, convex, only 

 yery slightly wider than long, much wider than the head, the sides very 

 broadly arcuate, becoming straight and convergent toward base, the 

 surface broadly and strongly impressed along the middle except toward 

 tip; elytra but little wider than long, about a fourth wider and a fifth 

 longer than the prothorax, with a large and broadly impressed area 

 behind the scutellum; abdomen posteriorly broadly arcuate at the sides 

 and as wide as the elytra, narrowed only slightly toward base, the three 

 basal depressions deep and coarsely, densely punctate; legs long and 

 rather stout, the hind tarsi with the basal ioints diminishing in length 

 as usual. Male sexual characters feeble, the fifth ventral with a very 

 feeble sinuation in median seventh or eighth, the sixth narrow, sinuato- 

 truncate at tip. Length 2.8 mm. ; width 0.65 mm. California (Sonoma 

 Co.). l=Tachyusa har. Csy.] harfordi Csy. 



Subgenus Gnypetoma Csy. 

 19 — Form sublinear, strongly convex, highly polished, blackish -piceous, the 

 basal ventrals dark, the legs and antennae pale, testaceous ; punctures 

 extremely minute, only moderately close -set and asperulate on the 

 pronotum and elytra, largely obsolete on the head, except toward the 

 sides and base, and sparse on the abdomen; vestiture inconspicuous; 

 head moderate, rounded, the eyes not prominent, the vertex scarcely 

 impressed, the maxillary palpi long, glabrous but herissate with stiff 

 suberect setae; antennae unusually developed, slender, gradually and 

 strongly incrassate distally, the second and third joints much elongated, 

 equal, each somewhat longer than the first, the tenth about as long as 

 wide; prothorax only just visibly wider than long and but little wider 

 than the head, unusually narrowed anteriorly, rounded at the sides, 

 strongly convex , with a strong elongate-triangular depression before 

 the basal margin; elytra two-fifths wider and a fourth longer than the 

 prothorax, the humeri rather well exposed, the suture only obsoletely 

 impressed at base; abdomen toward tip broadly arcuate at the sides 

 and somewhat wider than the elytra, the sides distinctly converging 

 toward base, where it is but slightly narrower than the elytra, the 

 basal impressions of the first three tergites narrow, very deep, subequal 

 and impunctate; legs rather long and slender, the hind tarsi very short, 

 but little more than half as long as the tibiae, the basal joint subequal 

 to the next two combined. Male with the sixth ventral broad, with a 

 broad and feeble sinuation toward the middle at apex. Length 2.7 

 mm. ; width 0.7 mm. New Jersey (Elizabeth). [=Tachyusa bait. Lee.]. 



baltifera Leo. 



