OF WASHINGTON. 61 
Augusta, Kansas (E. L. Williams); Riley Co., Kans. (P. J. 
Parrott) ; Florence, Kans. ; Dadeville, Ala. (S. M. Robertson) ; 
Wetumka, Ala. (F. S. Earle) ; Columbia, S. C. (L. O. Howard) ; 
Ballentine, S. C. (J. Duncan); Texas (Ulke, i ex.); "Mich." 
(Knaus). 
Type. No. 8226, U. S. National Museum. 
A very injurious species, destructive to corn in both larval 
and adult stages in the localities given, except Texas and 
Michigan. 
Owing to the somewhat general confusion of maidis with 
robustus and pertinax, especially in economic literature, it has 
been included in the table of the pertinax group, although it 
possesses quite obvious characters which might justify its remo- 
val to a class by itself. Viewed from the dorsal surface, it 
bears a greater resemblance to scoparius than to any other 
species. The rostrum (fig. 10, d) is unique in this group. In a 
natural arrangement the last mentioned species would follow 
together with cariosus, each constituting a distinct group. 
There are two singular species which so greatly resemble 
others of the pertinax group that they may properly be described 
in this paper, although in reality they do not, on account of 
their tarsal characters, fall in the same class. A third form, 
which displays no affinity to any other group completes the 
list of descriptions. 
UNCLASSIFIED SPECIES. 
Sphenophorus incongruus, new species. 
Superficial appearance of costipennis, more slender, black with light 
ochreous coating, covering thoracic interspaces, elytra except three inter- 
vals and four callosities, the larger punctures on sides, and the mesepimera. 
Rostrum two-thirds the length of the thorax, moderately arcuate and 
compressed, a little more strongly at basal and apical fourths, anterior face 
of apex flat, posterior face suddenly bent forward, interocular puncture 
distinctly rounded, producing a strongly obtuse angle. 
Thorax one-fourth longer than wide, posterior two-thirds subparallel. 
Vittae polished black, narrow, moderately elevated, continuous, subparal- 
lel ; median slightly dilated in front of middle ; lateral as wide in basal half 
as median where dilated, at which point they are narrow with strong cur- 
vature on the medial (?) side, branch feebly indicated. Interspaces wide. 
Scutellum polished, deeply concave. 
Elytral striae very thin, with small punctures remotely placed. Inter- 
vals 3 and 5 and sutural half of i moderately shining, feebly elevated in 
apical half or more, i with a single row of fine closely placed punctures 
