GKO. H. HORN, M. I). 
81 () 
moderate, acute at tip, propleiiraj densely punctate granulate ; inetaiileurse rugose, 
soniewliat strigose. Al)domen finely punctured and finely transversely strigose. 
more densely at the sides, especially on the first two segments, vertical portion 
of the segments sparsely pubescent; last ventral segment finely serrulate at sides 
near the apex: pygidium coarsely punctate, feebly carinate along the middle: 
claws dissimilar in the sexes. Length .20 — ..34 inch.; 5 — 8.5 mm. 
Male. — Front more densely punctured and flatter; prosternuin 
densely punctured, hairy ; claws of anterior and middle feet cleft 
near the apex, nearly bifld, posterior claws cleft at middle, forming a 
broad tooth. 
Female. — Front more shining, more convex ; prosternuin less punc- 
tate, with short, sparse hair; claws of all the feet cleft at middle, 
forming a tooth. 
Variations. — In recent specimens the surface is clothed with a very 
tine, short pubescence, which gives them a pruinose aspect, the vast 
majority of cabinet specimens have no {luhescence. 
The differences of color have given rise to several names which do 
not seem to he worthy of retention, even as varietal names inasmuch 
as the intergrading of color is so gradual as to render it impossible 
to separate them. 
A. cupreolm Lee. was founded on a uni(|ue of rather larger size 
than usual, jeneo-cupreous in color. 
.4. poliius Say, is the more common form of cupreous color. 
A. pl'iimbeus Vec. founded on specimens of a dull leaden color; 
these intergrade with the cupreous and the green forms. 
^1. desertiis || Lee. was founded on a single specimen of smaller 
size and more brilliant color than the preceding forms. The sculp- 
ture is less dense. These may be either bright brassy, blue or green. 
Habits. — This species lives on Willows in whatever part of the 
country it is found. 
Hab. — Canada and the New England States westward to the Pa- 
eifle coast, Kansas, Colorado, New Mexico, Arizona, Nevada and 
throughout California. In the Atlantic region it extends as far south 
as Maryland, but no specimens have been seen from any of the 
southern Atlantic or Gulf States nor from the region south of the 
Ohio River. 
.4. fstllax Say. — Form moderately elongate, dark olivaceous, sometimes 
greenish, each elytron with three small pubescent spots. Anteniiie slender and 
long, reaching to the hind angles of the thorax, usually greenish, serrate from 
the fourth joint; head rather flat, with a feeble median imjiression from occiput 
to clypeus, front granulate and alutaceous, occii>ut slightly strigose. Thorax 
