H. C. FALL. 35 



cent scutellum, and in the great majority of specimens by 

 the testaceous or piceo-testaceous antennae, tibiae and tarsi. 



Pandura and inconspicua are small species with broad head 

 and relatively sparsely punctured thorax, elytra rather con- 

 spicuously dilated posteriorly ; black throughout with dull 

 lustre. They are very similar to each other, but differ by 

 the hind angles of the prothorax, which are broadly lamini- 

 form in patidura, much less expanded in inco7ispicua. In 

 pandura the elytral intervals are typically flatter than in in- 

 conspicua, but this character is apt to fail ; the surface lustre 

 is also somewhat duller as a rule. 



In the remaining species — sal ids, barbita and armicollis — 

 the head is elongate conical and the prothorax densely punc- 

 tate. Salicis is the smallest of the three, and differs from 

 the others in its non-protuberant mesosternum. The scu- 

 tellum is not densely pubescent, the abdomen similarly punc- 

 tate in the sexes and the antennal scape attains the eyes. 



Barbita and armicollis are as a rule much larger, though 

 some males are very small. Both have the mesosternum 

 protuberant, though Horn indicates this only for barbita, in 

 which it is usually rather more pronounced. Barbita is en- 

 tirely black with densely pubescent scutellum, and abdomen 

 normally and similarly punctate in both sexes. The an- 

 tennal scape lacks much of attaining the eyes in the 9 and 

 barely reaches them in the cf . 



Armicollis is black with reddish or yellowish-brown elytra 

 in the 6^, while the 9 is entirely reddish-brown; the scutel- 

 lum is not distinctly pubescent, the antennal scape nearly 

 attains the eyes in the 9 , and passes their anterior margin 

 in the cf . This species differs from barbita, and in fact all 

 our other species of the genus, in having the abdomen of the 

 c? polished and impunctate along the middle, the smooth 

 stripe limited on each side by a thin fringe of rather long 

 and fine erect hairs. The terminal segment in this sex is 

 truncate at apex with well defined though obtuse limiting 

 angles. 



The distribution of the eastern species is as follows so far 

 as known to me. 



TRANS. AM. ENT. SOC, XXXIX. 



