NORTH AMl^RICAN COLEOPTRRA. 
237 
mens are badly abraded, but wbat remains of scales seems to indicate 
that they are more dense and more closely adherent to the surface. 
I do not feel justified in considering it specifically distinct until in- 
creased and better material shall prove it to be so. 
A. nioleoiilii!^ Casey. — Closely allied to robustulus, with which it agrees in 
form and vestiture, and from which it differs in the following characters; Beak 
shorter and relatively more robust; antennffi entirely testaceous, except the 
clnh, which is darker ; second and third joints of fnnicle not elongate, equal, and 
together shorter than the following three joints; the head is more densely scaly, 
frontal fovea not well defined, elongate. Prothorax less closely punctured, punc- 
tures smaller; hind angles somewhat depressed; the femoral tooth is extremely 
small. Legs pitchy-black ; tihite scarcely widened towards the tip and like the 
tarsi, paler. Long. 1..5 — 1.8 mm. ; .06 — .07 inch. 
Hah . — District of Columbia, Maryland, Illinois, Wisconsin. 
ungularis Group. 
The three species constituting this group ai-e readily distinguished 
by the 6-jointed funicle and the claws armed with a short, incon- 
spicuous tooth ; they are elongate in form ; the elytra have a trans- 
verse denuded fascia. 
They are easily distinguished as follows : 
Beak long and slender, thighs toothed, pubescent. 
Larger, femora feebly clavate, pubescence yellow Uiigiilaris. 
Smaller, femora strongly clavate, pubescence white floralis. 
Beak short and stout, thighs not toothed, squamous imbilas. 
A. iiiigulari!$ Lee. — Elongate, chestnut-brown, underside of trunk piceous, 
thinly clothed with coarse yellowish pubescence, which is more dense and squami- 
form on the thoracic, side ]>ieces. Beak : male shorter and more robust, feebly 
curved, naked without lustre, alutaceous with a fine stria each side from base to 
middle; female long and slender, shining, finely alutaceous, not striate ; scrobes 
commencing about two-fifths from the apex ; in both sexes there is a slight enlarge- 
ment at the insertion of the antenna;. Auteume stout, fuscous, scape short, first 
joint of funicle short, second slender and longer than the third, which is a little 
longer than the fourth, joints 4-6 rounded, club closely articulate, entirely pu- 
bescent. Eyes feebly convex. Head alutaceous, sparsely pubescent; frontal 
fovea small, elongate. Prothorax wider than long, narrowed from base to front, 
sides broadly rounded and scarcely constricted at the apex ; base feebly emar- 
ginate each side ; surface closely, deeply and rather coarsely punctured, each 
puncture bearing a yellow hair. Elytra elongate, nearly one-third wider at base 
than the prothorax; sides nearly straight for two-thirds their length, thence 
gradually rounded to apex; strife fine, superficial, except the sutural one, which 
is more deeply impressed; punctures moderate, elongate, not very close; inter- 
spaces nearly flat, smooth, remotely punctulate; scutel densely pubescent; trans- 
verse fascia not very conspicuous, surrounded by a line of pubescem;e ; under 
surface densely punctured ; ventral segments subequal, fifth of % shorter than 
