OF WASHINGTON; 181 
deep and closely set. Lower surface more strongly coarsely punctate, 
ventral segments, particularly 2, 3, and 4 more densely. Femora and 
especially tibiae more strongly fimbriate. Posterior tarsi same as middle, 
third joint strongly explanate, as wide as long, about twice as wide as 
first. 
Length 9.5-12.5 mm., width 3.8-5.0 mm. 
Chicago, 111. (Chitteiiden) ; Indiana, Wisconsin, and Texas 
(U. S. N. M.); Marquette, Mich., July 14 (Hubbard.and 
Schwarz) ; Spirit Lake, la., June (Wickham) ; Nevada and 
California (Ulke). Evidently somewhat rare. 
Type. No. 9727, U. S. National Museum. 
The above description applies to the most distinct form of 
this species. There is, however, a color variation which does 
not seem deserving of a different name. It agrees with the 
typical form except in the fact that black is the predominating 
color; the vittae and intervals are all more or less shining black. 
This species is quite closely related to costipennis but is 
distinct by the more fimbriate tibiae, wider third joint of the 
posterior tarsi, and stronger punctuation of the lower surface. 
The typical form is distinct by color alone, but the less strongly 
marked form is duplicated by a Michigan specimen of costi- 
pennis (i in 300). This species as such was overlooked by 
Horn, as also by the writer, in considering species of the per- 
tinax group. The former mentioned it, however, as a variety 
"with the upper surface red, with the sutural interval and 
the median vitta black. The under surface is red varied with 
black, and the legs also red with the knees black." 
Sphenophorus sequalis Gyllenhal. 
This common, well-known species is quite different from 
ochreus Lee., the former being an eastern, the latter a western 
form; in fact, the two species are quite as distinct by many 
characters, more particularly by the punctation of the elytra 
and the coloration of the thoracic vittae, as are either from 
discolor Mann. The principal differences may be expressed in 
tabular form, as follows: 
Body covered with thick coating, subopaque on dorsal surface. 
Thoracic vittae pale, usually buff, distinctly elevated; median not 
wider at base than at apex; lateral with branch more or less 
indistinctly indicated; interspaces and sides distinctly deeply 
somewhat irregularly punctate. Scutellum coated, pale. 
Elytral striae with moderate rounded and deep punctures. 
Metasternum, first and second ventral segment c? concave and 
villous at middle; interior surfaces of femora and tibiae c? strongly 
