A I.IST OF THE APHIDIDAE OF JAPAN, WITH DESCRIPTION 409 
52. Siphocoryne acericola n. sp. 
Winged viviparous female — Body oblong, fulvous, with a greenish tinge 
(in alcohol), mesonotum black; antennae wanting hairs, shorter than the body, 
fuscous, the base of the 3rd joint yellowish, the 3rd joint subequal to the 4th 
and 5th taken together, with numerous sensoria, anterhinarial nearly 7 times 
as long as the postrhinarial ; wings nearly twice as long as the body, hyaline, 
costa and veins pale yellowish brown, stigma grayish, 2nd furcal near the 
apex of the first; abdomen on the lateral sides fuscous spotted; cornicles 
moderately long, near the apices dilated; cauda small, nearly 3 times as long 
as broad; legs pale yellowish, femora, except the bases, tibiae at the apices 
and tarsi, fuscous. 
Length of body 1.8 mm.; exp. tegm. 7 mm.; antennae 1.5 mm.; corni- 
cles 0.25 mm.; cauda 0.12 mm. 
Hab. — Hokkaido (Sapporo). 
F. P. — Acer palmatum. 
Nom. Jap. — Momiji-kiibirc-abura. 
It resembles closely 5". fraxinicola Mats., from which it may easily be 
distinguished by its much more enlarged cornicles. 
53. Melanoxanthus vignae n. sp. 
Winged viviparous female — Body oblong, greenish yellow, meso- and 
metanotum brownish j antennae much shorter than the body, the 3rd joint 
broadest in the middle, uneven, with numerous oval sensoria, somewhat longer 
than the 4th and 5th taken together, anterhinarial nearly 1 \ times as long as 
the postrhinarial; rostrum long, reaching somewhat beyond the 3rd coxae; 
wings hyaline, scarcely yellowish tinted, veins pale fulvous, stigma on the 
hind margin grayish, 2nd furcal near the middle of the first; cornicles short, 
near the middle distinctly dilated; cauda blunt-conical, with the cornicles 
pale yellowish; legs pale yellow, apices of the tibiae scarcely infuscated. 
Length of body 1.5 mm.; exp. tegm. 5.6 mm.; antennae 0.8 mm.; cor- 
nicles O.22 mm. 
