A LIST OF THE APHIDIDAE OF JAPAN, WITH DESCRIPTION 
Apterous viviparous female — Body fusiform, pale yellow, with numerous 
fuscous tubercles, somewhat arranged in 4 rows, each of which carrying a 
strong, long, capitate hair ; antennae much shorter than the body, whitish, 
apices of the 3rd, 4th and 5th, as well as the whole part of the 6th infuscated, 
anterhinarial subequal to the postrhinarial, the 3rd joint wanting sensoria ; 
rostrum short, not reaching to the 2nd coxae; cornicles very short, as long as 
wide; cauda large, somewhat longer than the lower genital plate, on its hind 
margin with some very fine hairs ; legs pale yellowish. 
Length of body 1.4 mm.; antennae 0.7 mm. 
Hab. — Hokkaido (Sapporo). 
F. P. — Carpi '//us cor data. 
Nom. Jap. — Sawashiba-buchi-abtira. 
In Europa Rlyzocallis carpinii Koch is injurious to Carpinus betiilus, and 
has some resemblance to my species ; our species resembles rather to M, ju- 
glandicola KoCH, from which it differs in having the longer anterhinarial. 
6. Arakawana n. g. 
Allied to Ckaitophorus Koch, from which it differs as follows : 
Frontal tubercles distinct ; antennae somowhat longer than the body, the 
first joint with 2 tubercles on the inner side, the 3rd joint only with a few 
sensoria in a single row, with less bristly hairs; pronotum near the base on 
each side with a small tubercle ; wings long and narrow, stigmatic nervine 
indistinct, cubitus of the hind wings at the base of the 2nd oblique strongly 
incurved ; cauda roundish, the lower genital plate deeply bilobed. 
Genotpye — Arakawana stigmata Mats. 
10. Arakawana stigmata sp. (PI. XVII, f. 5, a, b.) 
Winged viviparous female — Body oblong, black, with a greenish shade ; 
antennae except the first 2 joints, which being fuscous, pale yellowish, apices 
of the 3rd, 4th, 5th and the middle of the 6th, infuscated, anterhinarial nearly 
twice as long as the postrhinarial ; wings hyaline, stigma black, crescent- 
