180 
IOWA ACADEMY OF SCIENCES. 
Genitalia: Ultimate ventral segment of the female moder- 
ately long, nearly truncate behind, curved downward in the 
middle, giving it an emarginate appearance, the edge often thin 
and membranous. The last ventral segment of the male longer 
than the pronotum, truncate, cone Baling the valve. Plates 
narrow, ligulate, nearly four times longer than wide, longer 
than the last ventral segment, nearly equaling the pygofers, 
separated at the base by one-half their width, obliquely overlap- 
ping at tip. Pygofers broad at base, obliquely truncate from 
below, tips produced incurved and touching each other. 
Color very variable, early specimens of both broods, especi- 
ally of the first, light green, the yellow lines indistinct; elytra 
nearly hyaline, nervures weak. This form is the flavilineata 
Fitch, and striata Burmeister. Late specimens of the first 
brood and nearly all of the second are dark green with the 
elytra strongly reticulate. The yellow lines may be strongly 
marked or almost wanting; these include the forms described 
as quebecensis Prov. , cana, Burmeister and Jlavilineata S pang- 
berg. Specimens collected during the latter part of September 
and throughout October were more or less tinged with red, 
especially in the females. Specimens being taken which varied 
from the lines red, through forms that had the lines and the 
elytral reticulations red, to females that were almost entirely 
scarlet dorsally, these last being the typical octolineata form. 
Throughout the whole series the structural characters, witb 
the exception of the strength and number of the reticulations, 
scarcely varied. 
These conclusions are based on the examination of hundreds 
of specimens showing the most complete intergradations in ail 
these variations. In accord with the general rule for jassids, 
the first brood, mos%\j Jlavilineata form, are weakly veined, and 
those of the second brood, mostly octolineata form, ares'rongly 
veined and more highly colored. 
Larvae are very broad and depressed, more so than the adult, 
which it much resembles. The vertex is abruptly narrowed in 
front of the eyes, then strongly projecting with parallel mar- 
gins and a broadly rounding apex, the whole projeciion 
extremely thin, antennae nearly as long as body, basal joint as 
long as vertex, abdomen long and compressed; general color 
green. 
The pupae are broader, shorter, darker green than the lar- 
vae, and have two fuscous spots on the inner angle of the wing 
pads. 
