200 
WILLIAM G. DIETZ, M. I). 
scape very slender, impinging against tlie eye; fnnicle 7-jointed, first 
joint long, second much shorter and about twice as long as the third 
joint; joints 2-7 a little longer in the male than in the female ; club 
long, elliptical, acuminate at apex, and rather loosely articnlate ; 
shining and thinly pubescent. Prothorax wider than long, narrowed 
anteriorly and somewhat constricted at the apex, convex ; base feebly 
bisinuate. Edytra oblong, wider at the base than the iirothorax ; 
hnmeri prominent, rounded ; a little wider and more strongly convex 
posteriorly ; external margin ascending to apex, leaving the pygidium 
freely exposed ; sen tel oblong, densely pubescent. Prostern nm short 
in front of the coxie ; mesosternnm i-ather narrow between the coxie. 
Ventral segtnents more unequal in the male ; third and fourth shorter, 
fifth nearly twice as long as either the third or fourth segment, with 
a smooth semi-circnlar space at the apex. Female: segments nearly 
equal, third and fourth scarcely shorter than either of the preceding 
ones; pygidium exposed, perpendicular, with a deep, sharply defined, 
longitudinal excavation. Legs long and slender ; femora clavate, 
toothed ; tibite slender, armature strong ; tarsi slender, first joint 
elongate, hmger than the second ; third deeiily bilobed, s])ongio- 
pilose beneath ; fourth joint long and slender ; claws large, separate 
at the base with a long, slender tooth. 
The vestiture consists of rather coar.se, whitish pnbe.scence, which, 
on the elytra, is intermixed with fine, blackish hairs. 
The genus is represented by three species in onr fauna, while in 
Europe it is represented by A. jjabescens, and ])robably A. jjyreiioivs. 
Our sjiecies may be tabulated as follows: 
Thorax coarsely and less densely punctured; pubescence sparse, black hairs very 
scant; tooth of anterior femur without acce.ssory cusp. 
Larger, piceo- ferruginous ; prothorax nearly parallel at the sides behind, and 
less transverse; first two joints of funicle relatively longer. 
proi'iiiid ii!$. 
Smaller, rufo-ferruginous ; prothorax rounded at the sides and more trans- 
verse; the first two joints of funicle relatively shorter viilpiiiii!^. 
Thorax more finely and densely ])unctured; puhescence more conspicuous, hlack 
hairs more evident; anterior femoral tooth witli an accessory cusp. 
A. proliiiKlliM Lee.— I have but little to add to what has been stated in 
tlie generic description and synopsis of species; the first ami second joints of the 
funicle are longer and more slender in the 'Jj , the second joint being more than 
one-half the lengtli of the first, wliile it is scarcely one-half the length in the 
9 ; joints .'1-7 are rather longer than wide in the % . and transverse in the 9 : 
outer joints of funicle and clava darker or even piceous. Head blackish ; sides 
of prothorax almost straight for two-thirds their length from the base, then 
