40 



A. bifrons measures 2 \ to 3 lines, is reddish brown in colour, and has the 

 antennae longer. It is also not so convex as infima. Not common, but 

 occurs in sandy places as on the sandhills on the Lancashire coast. 



3. Length 2£ to 3 J lines ; anterior angles of the thorax pointed and 

 prominent - - A. rufocincta and A. Quenselii. 

 Both these rare species have the side margin of the thorax reddish ; but 

 rufocincta has the sides of the thorax rounded and the upper side pitchy, while 

 Quenselii has the sides of the thorax scarcely rounded and is dark bronze in 

 colour. 



b. — Thorax distinctly narrower in front than behind ; colours green, bronze, 

 or brassy black. 



1. Spine at the apex of the anterior tibiae simple (with a single point). 

 I. Length under four lines. 



Legs entirely red or reddish brown, 



A. tibialis, — Easily recognised by the two deep pits on each side of the 

 thorax. Length 2 lines. 



A. lucida. — Length 2 to 2J lines. Blackish or greenish bronze ; anterior 

 angles of the thorax rounded and not prominent. 



A. familiaris. — Length 2J to 3 lines. Greenish bronze or bronze; an- 

 terior angles of the thorax pointed and prominent. 



Legs wholly or entirely black ; first two joints of antenna red, 



A. spreta. — Length 3£ lines. Striae on the elytra not deeper behind than 

 in front. 



A, curta. — Length 3 lines. Striae on elytra deeper behind ; legs partly 

 (tibiae) reddish. 



A. lunieollis. — Length 3 \ lines. Striae deeper behind ; legs wholly black. 



Legs wholly or partly black ; first three joints of antenna red. 

 A. trivialis.^- Strive of elytra not deeper behind. 



A. communis.— Striae of elytra deeper behind ; the row of punctures at the 

 margin of the elytra is interrupted. 



A* continua. — Striae of elytra deeper behind ; marginal row of punctures 

 continuous. 



bb. — Length 4 to 5 lines. 



A. acuminata. — Legs entirely black ; elytra somewhat produced at the 

 apex ; striae not deeper behind. 



A. ovata. — Legs entirely black; elytra rounded at the sides, simply nar- 

 rowed, but not produced ; striae deeper behind than in front. 



