220 
WILLIAM G. DIETZ, M. I). 
wider at tlie base than long, sides strongly rounded and narrowed to the tip, the 
latter constricted : base scarcely eraarginate each side, disc more remotely, sides 
more densely punctured, punctures variable in size from medium to coarse ; pu- 
bescence condensed in front of the scutellum. Elytra one-third wider at the 
base than the prothorax, oblong and rather shining, a little widened posteriorly, 
sides nearly straight; strife feebly impressed, punctures moderate, round and 
not closely ap])roximate ; interspaces nearly flat, smooth, with a few. small ininc- 
tures; second, fourth and sixth wider than the adjacent interspaces, denuded 
fascia extending to the third interspace; lines of pubescence faintly marked. 
Legs and tarsi long and slender, thighs scarcely clavate, anterior and middle 
armed with a very small, acute tooth, posterior mutic; tarsi densely pubescent 
beneath. Long. 2— 2.,5 mm. ; .08 — .10 inch. 
Hub. — Wliite Fish Point, L. Sup.; District of Columbia. 
Two specimens ( % and 9 ) in Mr. Schwarz’s collection. 
A very distinct and easily recognized species. 
nigrinus Group. 
The species of this grouji difler from those of the two jireceding 
ones by the fifth ventral segment of the male being longer than the 
fourth, the third and fourth equal in length, or very nearly so. In 
some specimens the fifth ventral is not longer than the fourth ; in 
this case, however, the third and fourth are always equal and shorter 
than in the two preceding groups. 
The species are closely related, and are to be distinguished as 
follows : 
All the tliigbs armed with a single tooth. 
Black ; front foveate. 
Robust; anterior and middle tibife curved inward near the apex ; first joint 
of anterior tarsi twice as long as the second ; femoral tooth spiniform. 
ebeiiiiiiis. 
Less robust ; tibife straight, first tarsal joint scarcely longer than the second ; 
femoral tooth acutely triangular iiigriiiiis. 
More elongate; tibife curved near the base; first tarsal joint longer than the 
second; femoral tooth large albopilosns. 
Piceous or blackish, with aeneous lustre ; front sulcate between the eyes. 
Pubescence uniform; elytra without denuded fascia or lines of condensed 
pubescence. 
Larger and more robust; base of middle and hind thighs and distal half 
of tihife and tarsi, honey-yellow. .xaiitliot'iieiims. 
Smaller and more slender; legs piceous. tihiae and tarsi paler..seueolus. 
Elytra very coarsely .striato-punctate with partially denuded fascia and lines 
of condensed pubescence faber. 
Posterior thighs mutic, elytra with denuded fa.scia. 
Less robust, front sulcate, upper surface rather densely clothed with squami- 
form pubescence, denuded fascia ill-defined efl’etus. 
Very stout, front foveate, upper surface less densely pubescent, denuded fascia 
well defined scufellatus. 
