200 
IOWA ACADEMY OP SCIENCES. 
gg. V er tex little more than right angled ; 
species, brownish fuscous, with light 
nervures, male valve large, obtusely 
rounding, female segment deeply 
notched cinereus. 
cc. Elytra broadly overlapping at the tip, central anteapical cell 
elongate, constricted, distinctly longer posteriorly than the 
cells on either side, longer than the other discoid cell. 
d. Vertex orange yellow, general color yellowish, styles dis- 
tinctly exceeding the long plates auratiis. 
dd. Vertex light fuscous with brownish maculatlons general 
color fuscous, styles not visible beyond the short, broadly 
truncate plates signatifrons . 
A A.. Vertex short, disk convex, margin in front of the eyes arcuated, tip bluntly 
produced; ocelli below the disk of the vertex in front of the middle of the 
eye. 
BBB. Pronotum long, distinctly angled behind, side margins long; species 
dark maculate or black; a series of small points on the anterior margin 
of the vertex, between the ocelli. Known larvae margined or banded, 
c. Olavus with a series of reticulations between the outer nerve 
and the suture ; species fuscous, with black points on the vertex, 
elytral nervures light. 
d. A pair of large, round, black points on anterior margin 
of each, vertex, pronotum and scutellum; length four 
mm inimieus. 
dd. Points small, usually confined to the vertex, species 
shorter, length three mm. 
e. Elytra distinctly longer than abdomen, vertex 
acutely produced in the middle; male plates con- 
vexly pointed, width at middle two-thirds their 
length . — weedi. 
ee. Elytra about equaling abdomen, vertex more 
obtusely rounding, male plates concavely atten- 
uate, four times as long as width in the middle. . 
compactus. 
cc. Clavus without reticulations along suture; species black, with 
white points on vertex, outer two apical veinlets white, costa 
yellow flavocostatus 
DELTOCEPHALUS BILINEATUS G. & B. 
Hemiptera of Colorado, p. 85. 
This species is very closely related to the European D. for- 
mosus, and like it, is very variable in color, ranging from almost 
black through distinctly black-striped forms to red-striped 
forms with black spots, and even on to those in which the black 
is almost wanting. It may be readily distinguished, whatever 
its color, by the re flexed white veinlets and its narrow elongate 
front. The dorsal stripes are always indicated, though vari- 
ously colored and spotted. The general ground color beneath 
is some shade of yellow and the long plates of the male are 
broadly black tipped. This species was described from Colo- 
rado and has been collected at Ames, also in New Hampshire 
by Professor Weed. The Iowa specimens were taken in July 
from the undergrowth in a woody pasture where ScapJioideus 
jucundus occurred, which species it sometimes closely mimics. 
