396 WILLIAM G. DIETZ, M.D. 



joints, which are widened toward the clava, tlie latter sh<)rt, ovoidal. Head 

 densely scaly, channeled between the eyes; prothorax one-half wider tlian long, 

 rounded on the sides, broadly constricted at the apex, lateral tubercles small, 

 acute, dorsal channel extending from base to about the middle, disc densely punc- 

 tured, a spot of pale scales in front of lateral tubercles. Elytra less than one- 

 third wider at the base than the prothorax and a little longer than wide, striae 

 impressed, punctures not distinct, interspaces flattened, an ill-deiined spot of 

 condensed scales near the base and at the end of the tliird interspace and two- 

 fifths from the base on the fifth and ninth interspaces: tibia widened from the 

 base to the apex, posterior pair with a large rectangular tooth one-third above 

 the apex, tarsi rather slender, fourth joint as long as the two preceding joints 

 together; jiygidium densely ])unctured. Length 3.5 mm. ; 0.14 inch. 



%. Last ventral segment with a broad, feebly impressed fovea; middle and 

 posterior tibias not unguiculate at tip. 



Hah. — Montana. 



Three females in Dr. Horn'.s coll. Distinguished from all others 

 by the large rectangular tooth of the hind tibiae. 



A. ilex n. sp. PI. xii, fig. 8. — Agrees with the preceding species in size and 

 form; upper surface more densely scaly, scales pale brown and grayish white in 

 about equal proportion; underside as in griseus ; beak densely punctured, sub- 

 carinate, pubescent, orbital margin acutely elevated, front broadly concave; pro- 

 thorax as in griseus, narrowly and not very strongly constricted at the apex. 

 Elytral strise le:?s impressed and with the punctures more or less concealed by 

 the scaly vestiture, interspaces flattened, anterior three-fifths with the exception 

 of the sutural interspace more conspicuously mottled, latter and apical two-fifths 

 more uniformly pale gray; posterior tibise conspicuously widened toward the 

 apex, forming a large triangular tooth, the distal margin of which forms an 

 almost straight line to the apex. Length 3.5 mm. ; 0.14 inch. 



% . Last ventral segment feebly impressed ; middle and posterior tibiae not 

 unguiculate at the apex. 



Hub. — Montana. 



A male specimen in my coll. The form of the posterior tibia? 

 reacblv distinguished in this species. Its nearest ally is griseun, from 

 which, aside of til)ial structure, it differs by the brqadly concave 

 front, acutely elevated orbital margin, the narrow and less sharply 

 defined apical constriction of the {)roth()rax and sexual differences 

 in the male. 



.4. ciirliiw (iyll. ri. xii, fig. 10. — Broadly oval, dark ])iceous, antennae and 

 legs reddish brown, ratlier densely clothed with very small. broMn and ))ale cine- 

 reous or ochreous scales, underside densely (clothed with oval, ashy-gray or pale 

 yellowish scales. Beak stout, somewhat flattened above, densel.v .scaly and scarcely 

 tapering toward the apex in the male, cylindrical, strongly tapering and shining 

 beyond the antennal insertion in the female ; antennae inserted two-fifths from 

 the apex ( % ), or at the middle ( 9 )i stout, first joint of funicle robust, scarcely 

 longer than the second joint, joints 3 7 short, widened outwardly, orbital margin 

 elevated, front moderately concave between the eyes ; prothorax convex, less than 



