1015] ©). Japanese Chrysopide& © ~- 121 
_ Parachrysa n. gen. © 
Anterior margin of labrum entire. Antenna about as long as the 
“body,.shorter than the wings; the basal joint much dilated. Fore wing 
elongate, subacute at apex, basal part of the costal space narrow, 
gradually widened towards the middle of the wing; two gradate series 
of cross veins; the third cubital cell transversely and apparently about 
equally divided by a vein, which is not parallel to cubitus. Hind 
‘wing with two gradate series. Abdomen of the male with a large, 
peculiar-shaped subgenital plate, but without paired lateral appendages. 
Type: Nothochrysa olivacea Gerst. 
So far as the wing venation is concerned, this genus closely 
resembles Banks’ Allochrysa, but I think the distinction be- 
‘tween these two genera may be looked upon as of sufficient 
generic value in view of the fact that, while Parachrysa has a 
large subgenital plate, Allochrysa is altogether devoid of it—a 
sort of difference analagous to that which separates Chrysocerca 
from Chrysopa. 
“  Parachrysa olwacea is a very rare insect in Japan. I have 
only a single male specimen which I succeeded in obtaining 
at Nikko, on July 19, 1914. 
Chrysocerca japonica n. sp. 
Head pale yellow, with no marking; maxillary palpus fuscous 
black, few terminal joints yellowish ; labial palpus yellowish. Antennae 
about as long as fore wings, pale yellow; terminal joints more or less 
suffused with fuscous. 
Prothorax somewhat longer than broad; pale yellow with greenish 
suffusion; meso- and meta-thorax greenish yellow with a whitish longi- 
tudinal band above. Legs pale yellow; anterior tibia somewhat brown- 
ish; claws piceous or fuscous black. 
Fore wing rather broad with its apex nearly rounded. Costa, 
subcosta and radius pale yellow; cubitus and anal veins also pale 
yellow, but terminally blackish; radial sector and media pale yellow, 
but blackish basally and terminally; cross veins exclusively blackish; 
branches of radial sector also blackish; pterostigma pale yellow. 
About twenty cross veins in costal area; inner gradate series somewhat 
irregular in arrangement, containing six or seven veinlets; outer series 
runs almost parallel to the outer. mor of the wing, and is made up 
of some nine or ten cross veins. 
Hind wing narrow; veins mostly eeecas but radius, media, cubits 
and anal veins pale yellow: cross veins mostly blackish, but those in 
anal area of the wing pale yellow. Inner and outer sradate series 
each consists of about seven cross veins. 
Abdomen yellowish, somewhat fuscous on ventral side; the male 
with a long subgenital plate, which is covered with fine pale yellow 
hairs, and is rather triangular in shape when seen from below; dorsal 
appendage short, furnished with numerous long hairs. 
