Neuropterous Fauna of Japan. 181 
sides; lobes of the meso-notum much swollen, and deep 
black ; ; meta-notum almost wholly black. Abdomen black, 
with pale hairs. Legs yellow, with pale hairs; terminal 
joint of the tarsi black ; claws serrate internally. Anterior 
wings acute at the apex, pale greyish-fuscous; neuration 
blackish, excepting the sub-costa and radius, which are 
yellowish ; the cubital discal region and pterostigma with 
darker fuscous spots, those in the former position forming 
an ill-defined irregular lime running into the apex, and 
bordering the inner marginal area, “which is almost uni- 
formly greyish-fuscous, with a series of whitish spots on 
the margin ; costal veinlets mostly simple; sector with 
about thirteen branches ; the two series of gradate veinlets 
complete and nearly parallel. Posterior wings paler, sub- 
hyaline, without markings, except the brown pterostigma. 
Eixpanse 52 mm. 
One example from Yokohama (Pryer), in Wermald’s 
collection. 
O. hyalinatus, sp. nov. 
Head yellow; colours changed in dry individuals (but 
bright yellow in one that had been in alcohol) ; antennze 
black. Pronotum black, varied with yellow. Abdomen 
brown, with pale hairs, yellowish at the apex. Legs pale 
yellow, with concolorous hairs; claws simple. Anterior 
wings broad, subacute at the apex, subhyaline, with a 
greyish tinge, highly iridescent; neuration black, but the 
subcosta and radius yellowish; as a rule without spots, 
but occasionally there is a small dark discal point, and 
another on the outer series of gradate veinlets; inner 
marginal area sometimes slightly clouded; pterostigma 
brownish ; all the costal veinlets (excepting those at the 
base) are *farcate, and almost invariably several of them 
towards the base are united by a little cross veinlet, 
forming, in these cases, double cellules; sector with 11— 
13 branches ; the two series of gradate veinlets complete 
and nearly parallel. Posterior wings without markings, 
excepting the brown pterostigma. 
Expanse 45—50 mm. 
Yokohama (Pryer) ; Kobé (Lewis). Several examples. 
In form this more resembles the EKuropean O. chrysops 
than do the other species. 
TRANS. ENT. SOC. 1875.—PART I. (SEPT.) oO 
