290 
GEO. H. HORN, M. D. 
costfe ; body beneath piceous black, witli faint bronze surface, shininfi; proster- 
nuni obtusely lobed in front with deep transverse impression, the process gr.ad- 
ually narrowed, acute at apex ; surface coarsely punctate, more rugose posteriorly ; 
metasternum granulate; abdomen granulate at base, the sculpture becoming 
rapidly liner toward apex, where the segment is finely or sparsely punctate; 
pygidium carinate, the carina projecting in a spine; the vertical portion of the 
ventral segments punctate and sparsely pubescent; claws similar on all the feet 
in both sexes. Length .22 — .28 inch.; 5. .5— 7 mm. 
Male. — Front more deeply impressed, less coarsely jninctate ; elytra 
not wider at the post-median expansion tlian at the humeri ; proster- 
num more coarsely punctate, metasternum slightly concave ; first 
ventral segment concave along the middle, the second segment rather 
deeply grooved for three-fourths its length, the groove smooth. 
Female. — Front flatter, more closely punctate, less deejily grooved ; 
elytra wider at the })osterior dilatation than at the humeri ; proster- 
nuin more spansely punctate, metasternum convex ; first two ventral 
segments not grooved, the surface smoother than in the male. 
Variations. — The normal and most common form has the head and 
thorax of bright cupreous color, the elytra black, .sometimes with 
a slight tinge of blue. The color of the head and thorax is, at times, 
quite brassy shading gradually to green. Specimens more rarely 
occur with these j)arts quite black, although with more gloss than 
the elytra. In all other characters excepting size, the species is re- 
markably constant. 
Habits. — The larva of this insect feeds in the stems of Blackberry 
and Raspberry, emerging in the early Summer. An excellent article 
illustrating the injuries done, together with a figure of the larva, will 
be found in “ Insects Injurious to Fruits,” by Wm. Saunders (J. B. 
Lippincott Company). 
Hab. — Occurs from Canada and the New England States south- 
ward to Virginia and westward to Missouri. 
A. lateralis Say. — Form of ruficollis. Head and thorax cuiireous; elytra 
black, with slight feneous lustre. Anteniire piceous, slightly bronzed, scarcely 
attaining the middle of the thorax, serrate from the fourth joint ; head imjiressed 
from the occiput to the clypeus, less deeply than in ruficollis. entire head rather 
coarsely and closely punctate. Thorax broader than long, not narrowed at base, 
sides moderately strongly arcuate, slightly explanate posteriorly, lateral edge 
slightly sinuous, hind angles with a slight tuberosity 'J, , or subcarinate J ; disc 
moderately convex, a vague median depre.ssion divided in two portions, a mod- 
erately deep oblique lateral depression ; surface transversely strigose, siibgranu- 
late at middle in front; scutellum transversely carinate, less distinctly in % ; 
elytra with a slight posthnmeral sinuation, behind which there is a slight dila- 
tation ; basal depressions W'ell marked, ajiices rounded, not distinctly serrulate. 
