OF WASHINC4TON. 57 
Rostrum fully five-sixths as long as the thorax, at apex slightly more 
dilated, and slightly subacutely produced on the posterior face. Thoracic 
vittae about as in setiger but more widely separated, posterior third of me- 
dian very narrow. Elytra without subapical callosity, striae finely punc- 
tate, intervals feebly convex except anterior half of sutural and third, 
which are a little more prominent. Lower surface subopaque or feebly 
shining, faintly, rather coarsely punctate in thoracic region, more faintly 
in abdominal region. Natural coating completely covering the mesepi- 
sternum, metepisternum and metepimeron, sides of the metasternum and 
posterior portions of the abdominal segments. 
Length 14 mm., width 4.8 mm. 
Jacksonville, Fla. One $ and one imperfect specimen, a do- 
nation to the National collection by Dr. Wm. H. Ashmead. 
Type. No. 8227, U. $. National Museum. 
Sphenophorus robustus Horn. 
Sphenophorus robustus Horn, Proc. Am. Phil. Soc., pp. 419, 420, 1873, 
Most closely allied to setiger and peninsularis , but of more robust form, 
and differing also by the more arcuate rostrum, which is a little more com- 
pressed and truncate at the apex with the inner or posterior angle acute. 
The thoracic vittae are more elevated; median vitta distinctly dilated at 
middle, posterior portion broad and attaining the base, lateral vittae 
slightly sinuous internally, gradually from apex to base, lateral branch 
feeble. Elytra finely, distinctly striate and punctate; intervals flat, sub- 
equal; surface evenly clothed with a thin cinereous or plumbeous subseri- 
ceous coating. 
c?. Ventral concavity feebly concave, nearly as coarsely punctate as at 
the sides. 
$ . Normal, with ventral punctures smaller and sparser. 
Length 1 1-14 mm., width 4.5-5.5 mm. 
This species ranges from Indiana and Michigan through Wis- 
consin, Minnesota, and western Kansas to California. It is 
a northern form not occurring in the Hast. Nothing appears to 
be known of its habits, references to robustus and its injuries to 
corn being due to a distinct species, my 5". maidis. 
Sphenophorus costipennis Horn. 
Sphenophorus costipennis Horn, Proc. Am. Phil. Soc., p. 420, 1873. 
Length, 7-12.5 mm. ; width, 3-4.5 mm. 
This species, with mlloswentris eliminated, should be easily 
distinguished by the characters furnished in the table. The 
female is not so readily separated. In the structure of the 
rostrum these two forms exhibit a very slight difference. The 
average size is a little less than pertinax. There is considerable 
variation as regards dimensions and color, which, however, do 
