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IOWA ACADEMY OP SCIENCES. 
antenuEe; the spots on the vertex more or less united and merged into 
bands connecting with the oblique bands on the disk in the darker forms 
the front is 'roundingly inflated, the margin continuous with that of the 
clypeus; clypeus broadest below. The dark markings on the front 
heighten this appearance by rounding away from the sutures above on the 
front and expanding on the clypeus below. While these two forma are 
fairly constant they so intergrade in structure and color as to render 
separation impossible. Late specimens of the green form being often 
similarly marked and even more highly colored than early ones of the 
fuscous form; while early examples of the fuscous form often possess a 
venation even weaker than that of the green form and would be readily 
mistaken for Cicadula. Moreover, there is no distinction in the larvae 
which produce them. 
Larvm: Form nearly that oi davocostatus; slightly narrower and more 
elongate, approaching those of exitiosa. More distinctly yellow than those 
of D. ocellaris, unmarked except two black dots on the margin of the 
vertex midway between the eye and the tip and a pair of oblique dashes on 
the disk of the vertex. The pupas have in addition to these three spots on 
the anterior margin of the wing-pads and a number on the posterior half 
of the disk more or less definitely arranged in transverse rows. 
A very widely distributed and abundant species. Specimens 
are at hand from New York, Maryland, Mississippi, Louisiana, 
Illinois, Iowa, Colorado and California. 
DELTOCEPHALUS ARGENTEOLUS UHL. 
Deltocephalus argenteolus Uhler. Bull.'U. S. Gaol, and Geog. Surv., Ill, p. 473, 1877. 
Athysanus curtipennis Gillette and Baker. Hemiptera of Colorado, p. 93. 
Eutettix terebrans Gillette and Baker. Hemiptera of Colorado, p. 103. 
The short- winged forms of this species are very close to the 
European species of the genus Doratura. 
D. MONTICOLA G. AND B. 
Hemip. Col. p 88. 
This is a good Deltocephalus, but specimens came to late to 
allow of its insertion in the synopsis. It would follow D. 
minimus, which it closely resembles in size and coloration, but 
from which it is readily separated by the presence of a distinct 
median tooth on the last ventral segment of the female. 
DELTOCEPHALUS MINUTUS VAN D. 
Entom. Amer. VI, p. 96, 1890. 
This species was described from a long-winged male, but it 
occurs in both long and short- winged forms very abundantly. 
The short-winged examples apparently fall into the genus 
Doratura. 
DELTOCEPHALUS OSBORNI VAN D. 
Trans. Am. Snt. Soc., XIX, p. 304, 1892. 
This species should be placed in Athysanus and close to 
extrusus. 
