304 GEO. H. HORN, M. D. 



The following species are known to me : 



Form oblong oval, rather depressed, elytra blue; beneath piceous; head, thorax 



and legs pale yellowish red texaiia. 



Form short, robust, entirely rufotestaceous, shining. 

 Thorax more than half wider than long, sides arcuate; antennse slender. 



socia. 

 Thorax very little wider than long, sides nearly straight; antennee stout. 



insolita. 



A. texaiia Crotch. — Oblong oval, not very convex; head, thorax and legs 

 bright reddish yellow, abdomen and elytra piceous, the latter with bluish or 

 purplish lustre. Antenuie rufotestaceous, slightly darker at apex. Head faintly 

 alutaceous, inipunctate, frontal carina well marked, the tubercles flat. Thorax 

 one-half wider than long, scarcely narrowed in front, sides feebly arcuate, disc 

 moderately convex, the punctuation rather fine, not closely placed, a little coarser 

 along the base. Elytra wider at base than the thorax, humeri rounded, umbone 

 moderately prominent, smooth, disc irregularly punctate, becoming much 

 smoother at apex, and with much coarser punctures forming irregular strife near 

 the base. Abdomen piceous shining, very sparsely punctate and pubescent. 

 Length .08— .10 inch. ; 2—2.5 mm. 



The males have the first joint of the anterior tarsi slightly dilated, 

 the last ventral segment obtuse at apex and the antennse a little 

 stouter. Chapuis states that the sutural angle is also more obtuse, 

 but this is scarcely evident in our species. By its form and elytral 

 sculpture this species represents the ovata Foud. of southern France. 



Occurs in Texas, Colorado and Nebraska, 



A. socia n. sp.— Oval, slightly oblong, convex, rufotestaceous, shining. An- 

 tenna' slender, longer than half the body, rufotestaceous, the second joint a 

 little longer than the fourth, third a little shorter. Head extremely finely alu- 

 taceous, irapunctate. Thorax one-half wider than long, not narrowed in front, 

 sides rather broadly arcuate, anterior angles obliquely truncate, with distinct 

 post-apical angulation, hind angles distinct when seen from above, base arcuate, 

 disc convex, the punctuation fine and indistinct, almost obliterated in front and 

 at sides. Elytra distinctly wider at base than the thorax, humeri obtusely 

 rounded, umbone distinct, sutural angles well marked, disc convex, a slight de- 

 pression divided by the suture very near the apex, punctuation extremely fine, 

 confused with vague indications of strial arrangement near the suture at base, 

 a very distinct stria of punctures at the sides a little distance from the margin. 

 Body beneath and legs colored as above. Length .08 inch. ; 2 mm. 



The unique specimen before me is a female, and has the terminal 

 half of the last ventral segnient paler, so that it appears at first 

 sight to be two segments. 



The very shining surface of this species will render it easily known 

 among all the species of the group, in connexion with the antennse. 



Occurs at Columbus, Texas. 



