224 
Ohio Biological Survey 
segment slightly more than twice the length of the other three conjoined; fourth 
segment hairy, very slightly longer than the first and second segments. Rostrum 
reaching the end of the rostral groove. Eyes very coarsely granulate. Pronotum 
reticulated, except near the base of the hood; median carina raised, with two or 
three areolae at the middle. Membranous pronotal margins very wide and broad, 
subquadrate, widely reticulated; hood rather coarsely reticulated. Legs short, 
beset with a few short hairs. Costal area very coarsely reticulated, with one com¬ 
plete and a partial series of areolae; subcostal area with five series of areolae; 
discoidal area broad, with five or six rows of areolae; sutural area with one com¬ 
plete and one or two partial rows of areolae at the base and apex. Length, 2 mm.; 
width, 1.35 mm. 
Color: Body dark gray-brownish. Legs and antennae brownish, more or less 
tinged with yellow. Eyes brownish. Pronotum yellowish, tinged with brown. 
Elytra brown, slightly tinged with yellow. Areolae hyaline or whitish. 
Described from a female specimen, taken at Cincinnati, Ohio, by Mr. 
Chas. Dury. 
Genus Corythucha Stal. 
Corythucha Stal, Enum. Hem., Band. Ill, p. 119, 1873. 
Head entirely concealed by the hood, the apex of hood reaching a lit¬ 
tle in front of the head. Antennae slender, beset with long, bristly hairs; 
first segment more or less swollen, from two to three times the length 
of the second; second segment less swollen, short; third segment very 
long, cylindrical; fourth segment moderately swollen towards the apex. 
Membranous pronotal margins broad, armed on the outer margins with 
short spines. Elytra narrowed at the base with outer margin strongly 
reflexed, with a tumid elevation near the antero-inner margin; costal 
margin including anterior reflected margin armed with spines, except 
about the distal third. The nervures of hood, membranous pronotal 
margins, and the elytra irregularly armed with a few erect spines. 
KEY TO THE OHIO SPECIES OF CORYTHUCHA. 
1. First segment of the antennae twice or slightly more than twice the length 
of the second. 2 
First segment of the antennae three or almost three times the length of 
of the second. 7 
2. Hood not very abruptly constricted about the middle; color entirely 
white, except elytra usually with a brown spot on the tumid elevation.. 
C. ciliata Say 
Hood abruptly constricted about the middle; hood and membranous 
pronotal margins pallid or hyaline, usually with a few brown markings; 
elytra pallid or hyaline, with one or two transverse brown or fuscous 
bands . 3 
