244 J. L. LECONTE, M. D. 



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Group I, — A. 



1. T. simplarius, n. sp. — Slender, not depressed, black, not shining, very 

 finely and densely punctulate, pruinose with extremely fine pubescence; tip 

 of abdomen, palpi and tarsi piceo-testaceous. Eyes coarsely granulated, not 

 very prominent; antennse testaceous, scarcely as long as the head and pro- 

 thorax, outer joints fuscous, transverse. Head with a distinct puncture at the 

 vertex. Prothorax one-third wider than long, moderately rounded on the sides 

 and narrowed behind; all the angles rounded and not prominent; disc uni- 

 formly slightly convex, without impressions, and witnout dorsal line. Elytra 

 quadrate, not wider than the prothorax, slightly convex, feebly impressed 

 near the scutellum, which is invisible. Abdomen and under surface similarly 

 punctured, but more pubescent. Gula deeply channeled and foveate. Length 

 2.5 mm ; .10 inch. 



Coney Island, near New York; on salt marsh, in July. 



I have two specimens from the same locality, in which the pro- 

 thorax and elytra are brownish ; the former comparatively less broad, 

 and less narrowed behind. I do not know if these are sexual or 

 specific characters, and merely mention them as worthy of future 

 investigation. 



2. T. convexulus, n. sp. — Of the same form as T. simplarius, and similar 

 to it, except that it is smaller, a little stouter, and less finely punctulate. The 

 antennae are entirely black, and the legs piceous, with the tips of the tibiae and 

 tarsi paler. The fovea of the vertex is absent. The prothorax is quite similar, 

 but there is a narrow smooth dorsal line; the elytra are much more distinctly 

 punctulate. Otherwise there are no differences. Length 1.8 mm; .07 inch. 



One specimen from Kansas, and one from New York. 



3. T. blediinus, n. sp. — Of the same form as T. simplarius, but much 

 smaller, more slender, black, very finely punctulate and pubescent, tips of 

 tibiae and tarsi testaceous. Antennse entirely black, scarcely as long as the 

 head and prothorax, outer joints transverse. Head with the vertex not foveate, 

 eyes rather large and convex. Prothorax nearly as long as wide, rounded on 

 the sides, moderately narrowed behind, all the angles rounded, disc not im- 

 pressed, smooth dorsal line very narrow, sometimes not visible. Elytra a little 

 wider and nearly one-half longer than the prothorax, moderately convex, 

 slightly impressed near the scutellum. Length 1.8 mm; .07 inch. 



San Diego, Mr. Crotch, also in Arizona; several specimens. Two 

 specimens are more slender, with the elytra shorter. 



4. T. nuirormis, n. sp. — Rather broadar and less convex, black, very 

 finely punctulate and pubescent. Vertex not foveate, antennse not longer than 

 head and prothorax, outer joints transverse; eyes less prominent. Prothorax 

 •wider than long, sides and angles rounded, slightly narrowed behind, without 

 impressions, or smooth dorsal line. Elytra a little wider, and one-third longer 

 than the prothorax, more distinctly punctulate. Legs piceo-testaceous. Length 

 1.2 mm; .05 inch. 



Pennsylvania, Georgia; three specimens. 



