— io6 — 



Testaceous; elytra coarsely punctured with suture, dorsal vitta and 



side margin black directa. 



Sides of head behind the eyes tumid, rounded, smooth; prothorax more 

 deeply constricted behind. 

 Black, with fine hoary pubescence, mouth and prothorax ferruginous. 



falsa. 

 D. — Disc of prothorax flattened behind and prolonged each side into a tu- 

 bercle; elytra truncate at tip. 

 Prothoracic tubercles conical lateral; black, elytra opaque, base and side 

 margin and sometimes the suture bright red . . . discoidea. 

 Prothoracic tubercles dorsal, obtusely rounded; black, elytra shining, 

 more distinctly punctured, black, striped, testaceous or fuscous. 



proteus. 

 Group III. — A moderately stout small species; the front and mouth ex- 

 tremely long; antennae inserted in front of the line joining the 

 anterior margin of the eyes; prothorax campanulate, constricted 

 in front, wider and feebly constricted behind; elytra truncate at 

 tip. 

 Black, elytra black, fuscous, or testaceous, sometimes witli a dorsal vitta 

 and tip fuscous pratensis. 



Bibliography, etc. 



A. thoracica Hald., Trans. Am. Piiil. 1S47, x, p. 60; sulcico/ns Dej., Cat. 

 third edition, p. 381. 

 Length 8 mm. = .32 inch. Hab. — Pa., Mass., Va. 



This species resembles the next in appearance, and seems to be 

 rare in collections. I am unable to say to what extent it varies in 

 color. Mr. Bland has described a form of. this species under the 

 name incerta with the base of the tibicC yellow. 



A. bivittata Say, J. A. P. 1823, III, p. 416; nigripennis Lee, J. A. P. ser. 2, 

 I, 1850, p. 323; varians Lee, 1. c, p. ii^\fusciccps Lee, 1. c, p. 



324- 

 Length 6—9 mm. = .24— .36 inch. Had.—'N. Y., N. H., 111., la., Wis., 



Dak., Neb., Mo., Kans., Col., N. C. 

 The typical form of this insect has the elytra yellow, with two 

 black vittae, while the thorax and legs may be either yellow, or more 

 or less black. The form nigripennis has black elytra, with thorax 

 more or less yellow. The form varians is entirely black, and fus- 

 ciceps is entirely testaceous, except the dusky head. While there 

 can be no doubt of the specific identity of all these forms, it may be 

 well to retain some names for convenience in exchanging. 



A. atra Lee, 1. e 1850, p. 323. 



Length 8 mm. = .32 inch. Had.—Oreg., Wash., Nev., Idaho. 



The coarse, sparsely-placed punctuation of the elytra, and very 



sparse pubescence, make this a very distinctive species. 



