NORTH AMERICAN COLIOOPTERA. 
293 
Hab. — Canada and New England States ; westward to Kansas ; 
soutliward to Texas. 
A. defectii!^ Lee. — Form and coloi-s of oiiosus. Autennie attaining tlie mid- 
dle of the thorax, the joints scarcely longer than wide, serrate from the fourth 
joint; head slightly convex, with scarcely a trace of occipital impression, front 
and occiput punctate. Thorax wider than long, not) narrower at base, sides 
arcuate from apex to base, hind angles obsoletely carinate in both sexes, lateral 
margin very nearly straight, disc convex, a vague oblique depression at the sides, 
two dei)ressions on the median line, but feebler than in otiosus : surface trans- 
versely strigose, the grooves punctate, more distinctly than in otiosus ; scutellum 
transversely carinate ; elytra sinuate behind the humeri with the post-median 
dilatation concealing the abdomen, apices rounded, finely serrulate, disc with 
scarcely a trace of costa, the sutural border elevated behind the middle, basal 
depressions feeble ; surface imbricately sculptured, but smoother near apex ; body 
beneath more shining, dull bluish green ; prosternal lobe obtuse, vaguely emar- 
ginate, the intercoxal process gradually narrowed and acute at tip, propleura? 
moderately closely punctate; metasternum not closely imbricate. Abdomen 
sparsely punctate along the middle, a little more closely at the sides; pygidiuin 
coarsely sparsely punctate, feebly carinate; tarsi slender, as in otiosus; claws 
similar on all the feet. Length .16— .18 inch.; 4 — 4.5 mm. 
Male. — Front more opaque and finely punctate; prosternuni 
coarsely, not clo.sely punctate, rather opaque. First two ventral 
segments faintly grooved, but not pubescent ; last ventral truncate, 
with a marginal fringe of hairs, curved and directed downward. 
Inner apical angle of all the tibiae s])iniform, slightly incurved. 
Female. — Front more shining and more evidently punctate ; pros- 
ternum more shining. First two ventrals not grooved, last ventral 
oval at tip, not fimbriate. 
Of the habits of this species I have no information. The only 
variations observed are those of color as in otiosus, the females rather 
more brassy. 
There can be very little doubt that this species was originally in- 
stituted to contain all the small specimens of otio.ms in which the 
Carina of the hind angles of the thorax is nearly or (piite Avanting. 
An examination of the series showed, however, that, abstracting the 
true otiosus, there remained specimens, one of which bore the type 
label, which clearly indicated a distinct species. They were, how- 
ever, females. A few days later Mr. Blanchard gave me a male, 
which was clearly a mate for the type. As might be inferred from 
the preceding i-emarks, the sjiecies very closely resembles small or 
starved specimens of otiosus. There need be no ditficulty, whatever, 
in separating the males from any Agrilus in our fauna, but the fe- 
males are more difficult. It will be observed, however, that in the 
