IOWA ACADEMY OP SCIENCES. 
207 
one-third the way back from the point, white; vertex light margined, 
except posteriorly. 
Pupm with oblique mark and spot in lateral white line present but 
obscure. Below, as in re^exus, dark marks nearly black. 
This is the smallest species of the reflexus group; this and its 
cinereus color will enable one to separate it from pectinatus to 
which its dark face allies it, and which separates it from reflexus, 
or it may be readily separated from either by its genitalia. It 
has been collected abundantly at Ames, but it is not known from 
any other locality, although doubtless it will be found to occur 
with the other members of the reflexus group throughout the 
range of the Bouteloas. 
Adults and full grown larvae were first taken in company 
with the preceding species from Bouteloa Mrsuta August 4th 
and 8th, 1896. By the middle of the month larvae had disap- 
peared, adults continuing numerous throughout the month and 
on until the middle of September. The spot where this species 
was found was a high gravelly pasture, the tops and sides of 
the knolls being covered with this grass, to which it seemed 
strictly confined. 
DELTOCEPHALUS OCELLARIS PALL. 
Cicada ocellaris, Fall. Hem. Suec., II, p. 30, 13 (Vide Melichar). 
This is a much stouter and darker species than sayi, occurring 
commonly throughout central Europe, and has been received 
from Colorado. The vertex is much broader than in sayi; width 
between eyes nearly equalirg length; pronotum very short; 
elytra very broad ; nervures strong; clavus reticulated, central 
anteapical usually unequally divided. Color much darker than 
in sayi; light markings on vertex variable, not concentric; face 
dark, an inverted white T on apex of front; venter and geni- 
talia shining black. Readily separated by the immense, con- 
vexly inflated shining black valve and the large, convexly 
margined plates of the male. Length, 3.50 mm. Width, 1.50 
mm. The Colorado specimens were taken by Professor Gil- 
lette in Laramie county, July 5th. 
DELTOCEPHALUS SAYI FITCH. 
(PI. xxiii. Fig 3 ) 
Amhlycephalus sayi Fitch. Homop. N. Y. State Oab., p. 61. 
Jassus sayi Walk. Homop. IV, p. 1158, 1853. 
Deltocephalus sayi Uhler. Bull U. S. Geol. and Geog Surv., IV, p. 511, 1878. 
This species may be swept sparingly almost everywhere, but 
■occurs throughout the summer in immense numbers on blue 
grass in woody pastures, either high or low. 
