48 JOHN B. SMITH. 



Thorax with a distinct impressed line. Elytra broadly ovate, striae finely but 

 evidently punctured, intervals very slightly convex. Beneath, sternuni evenly 

 and moderately punctured, abdomen scabrous and irregularly punctate. Lengtii 

 2.5 mm. 



Hah.— Mo., Cal. 



Ten specimens received from very divergent localities, and presenting 

 nothing peculiar. 



A. iilipuiictistriafum n. sp.— Entirely black, rather broadly ovate. 

 Eyes not at all prominent: antennae, head and thorax as before; thorax slightly 

 produced into an obtuse tubercle at middle, rather finely and sparsely punctured. 

 Elytra broadly ovate, widest behind middle; striae very fine, punctures not evi- 

 dent; intervals wide, flat and impunctured. Beneath obviously punctured. 

 Length 2 mm. 



iTai.— Texas, J). C. 



Presents nothing unusual and much resembles ovalis ; sufficiently dis- 

 tinct, however, by the smaller size, somewhat stouter form, the slight 

 tubercles or angles at the sides of thorax, the less distinct eyes and the 

 narrow impunctured striae. 



A. desolatiim n. sp. — Entirely black, slender, very much elongated. Thorax 

 unusually long, moderately punctured, elytra without trace of humeri and very 

 narrow, ovate, striae punctured, intervals convex. Length 1.5 mm. 



ffab. — Gra. 



Unique in its attenuate appearance, and thereby easily distinguished 

 from others in this group. The elytra lack all trace of humeri ; usually 

 even in species which have no obvious humeral angles, there is an eleva- 

 tion more or less distinct on the elytra, which indicates the humeri. 



A. sordidum n. sp. — Fulvo piceous, elytra paler, slender, sparsely pubes- 

 cent. Head broad, eyes distinct; rostrum sulcate from base to middle; antennae 

 short and stout. Thorax grossly, but somewhat sparsely punctured, with a short 

 foveate line at base. Elytra narrow, ovate, humeri very slightly indicated, striae 

 wide and deep, densely and grossly punctured, intervals narrow, carinate. Be- 

 neath rather sparsely punctured, more distinctly pubescent, Length 1.25 mm. 



Hah.—V. T. 



This species was in Dr. Horn's collection, labelled "from galls on 

 Artemesia.^^ Subsequently I received the same species from Prof. Riley, 

 with the same legend ; whether the species is a true gall maker or only 

 an intruder in the galls from which it was bred is still a question. Most 

 likely it will be found to be the producer of the gall. The few speci- 

 mens I have seen were all alike, and all from one locality — probably they 

 will be found wherever Artemesia grows. The insect is so distinct by 

 color and elytral sculpture that an enumeration of the differences be- 

 tween it and the species associated with it, seems superfluous. 



