414 S. MATSUMURA « 
Hab.— Hokkaido (Sapporo). 
F. P. — Oryza sativa (attacking roots). 
Norn. Jap. — Ine-abura. 
This species may differ from Y. rufiabdominvlis Sasaki in having smaller 
size, fuscous abdomen, wanting any marking, etc. 
57. Toxoptera piricola n. sp. (PI. XVII, f. 4, a, b.) 
Winged viviparous female — Body oblong, yellowish green; antennae fus- 
cous, at the base paler, subequal to the body, frontal tubercles short but dis- 
tinct, on the inner side with a small tubercle, the 3rd much shorter than the 
6th, the 4th subequal to the 5th, anterhinarial very slender, nearly 8 times as 
long as the postrhinarial ; wings hyaline, veins pale ochraceous, stigma gray- 
ish, cubitus obsolete at the base, with one furcal which branching nearly in 
the middle; abdomen not constricted at the base, cornicles long, cylindrical, 
cauda moderately long, at the apex broadly conical, with the cornicles con- 
colorous with the body; legs greenish yellow, tibiae at the apices and tarsi, 
as well as the posterior femora at the apices, somewhat infuscated (in alcohol). 
Length of body 1.6 mm.; exp. tegm. 6 mm.; antennae 1 .6 mm.; corni- 
cles 0.25 mm. 
Apterous viviparous female — Body yellowish brown, oblong; antennae 
distinctly shorter than the body, frontal tubercles nearly as in Myzus] the 3rd 
joint much shorter than the 6th, the 4th and 5th subequal, anterhinarial near- 
ly as 8 times as long as the postrhinarial; abdomen short oval, cornicles 
long, surpassing beyond the cauda, at the base somewhat dilated ; cauda 
broader than the cornicles, broadly conical ; legs robust, the hind pair much 
longer than the anterior 2 pairs ; rostrum reaches boyond the 2nd coxae. 
Length of body 1.6 mm.; antennae 1.3 mm.; cornicles 0.25 mm. 
Hab. — Shikoku (Iyo). 
F. P. — Pirus sinensis; collected by Mr. Shbgeki Akakawa. 
Norn. Jap. — Nashi-abura. 
