H. C. FALL. 113 



5. Humeri present. 



Elytral intervals convex, surface opaque. 22. f'liiiereiiili. 



Elytral intervals flat, surface somewhat shinincf... . . .23. occideiltale. 



Humeri wanting 24. tiespei'iiiii. 



1. A. erri&ti«'iini Smith. — Vt-ry narrow, convex, hlack ; lejrs sometimes rufo- 

 piceous; pubescence sparse. Beak (%) rather strongly curved, snbeqnal to the 

 head and prothorax ; ( 9 ) fi little more slender and nearly one-third longer, not 

 dilated, strigose, except in apical third ( %, ), or even half { 9)- which is polished ; 

 punctuation sparse but distinct. First antennal joint equal to the next two ( % ) 

 or a little longer ( 9 ). third .joint much more slender, but nearly or quite as long 

 as the second, and about one-half longer than the fourth. Front barely wider 

 than the tip of the beak, canaliculose; eyes not very prominent. Prothorax 

 longer than wide ; base not wider than the apex ; sides feebly arcuate, a slight sinu- 

 ation before the base; surface closely not coarsely punctate; dorsal line distinct 

 but never complete. Elytra very narrow, sides parallel ; humeri small, oblique; 

 intervals flat, not twice as wide as the strife. Beneath strongly, moderately, 

 densely punctate; legs long, rather thin; claws with a very small, obtuse tooth. 

 Length 1.9-2.3 mm. ; .08 .09 inch. (PI. II, figs. 1 and hi). 



%. Sutural angles less prominent, but scarcely rounded; second joint of 

 antennse setiferous; anterior tibise more suddenly and more strongly widened; 

 femoral tubercle strong, rounded ; smooth area with fine, distant strise ; limiting 

 ridge absent Middle and hind tibife niuci'onate. Metasternal spicules long. 



9 . Sutural angles more prominent, but not prolonged; other parts unmodified. 



Hub. — Texas. 



Taken by Mr. Schwarz at Colunihus, and at Luling, a little 

 west, by both Mr. Wickhani and myself. Two specimens in the 

 National Museum collection are labelled Montana. 



2. A. iinpedittiin u. sp. — So like the preceding in size, outline and sculp- 

 ture that a statement of the chief points of divergence will be sufficient for its 

 recognition. The beak is a little stouter and less elongate, especially in the 

 female. The antennse are less slender, the eighth joint being at least as wide as 

 long. Prothorax very little if at all longer than wide; dorsal line nearly com- 

 plete; humeri a little less oblique. Tarsi stouter; second joint as wide as long; 

 always noticeably longer than wide in erraticum. Surface less shining, legs more 

 evidently rufous. The sexual characters are the same as in erraticum, except 

 that the femoral tuben^le is less developed. (PI. II, fig. 4). 



Hab. — New York (Peekskill), District of Columbia. 



A single male in my own collection from the former and two 

 females from the latter locality are all that I have seen. In one of 

 the females the surface is decidedly rugulose and subopaque. In 

 the single male the first antennal joint is shorter than in males of 

 erraticum,. 



3. .4. qiiatlricolle n. sp. — Entirely black, not very shining. Beak cylin- 

 drical, stiongly arcuate, a little longer than the head and prothorax (9). Fii-st 

 antennal joint barely equal to the two following. Front subcanalicnlose and 

 punctate; eyes moderately prominent. Pi'othorax quadrate, base and apex 



TR.\NS. AM. ENT. SOC. XXV. (15) OCTOBER, 1898. 



