390 S. MATSUMURA 
a few sensoria in a single row, somewhat shorter than the 6th, anterhinarial 
nearly 2 \ times as long as postrhinarial, the 4th subequal to the 5th; wings 
hyaline, with a yellowish shade, veins somewhat infuscated, stigma grayish, 
2nd furcal rather nearer the apex of the first; abdomen short oval, cornicles 
dark green, long, scarsely dilated at the base ; cauda fulvous, broad, moder- 
ately long; in the middle somewhat constricted, at the apex being rounded ; 
legs fulvous, with a greenish shade, tibiae at the apices and tarsi, somewhat 
infuscated. 
Length of body 1.3 mm.; exp. tegm. 5.4 mm.; antennae 1.2 mm.; cor- 
nicles 0.3 mm. 
Apterous viviparous female — Body long oval, dark green ; antennae 
greenish fulvous, the basal 2 joints infuscated, much shorter than the body, 
the 3rd somewhat longer than the 4th, anterhinarial nearly twice as long as 
the postrhinarial; cornicles quite long, nearly reaching to the middle of the 
cauda; cauda near the middle somewhat constricted; legs greenish fulvous, 
tibiae at the apices and tarsi, infuscated. 
Length of body 1.8 mm.; antennae 1.4 mm.; cornicles 0.25 mm. 
Pupa — Nearly the same as the apterous viviparous female ; anterhina- 
rial nearly 3 times as lung as the basal part of the same, wing-sheath dark 
greenish, reaches to the 2nd abdominal joint; cornicles shorter, at the base 
dilated; cauda short and broad. 
Length of body 1.7 mm.; antennae 1.0 mm.; cornicles 0.25 mm. 
Hab. — Hokkaido (Sapporo). 
F. P. — Polygonum species. 
Nom. Jap. — Tade-abura. 
29. Aphis yanagicola n. sp. 
Winged viviparous female — Body black, long oval ; antennae, rostrum, 
cornicles and legs yellowish ; antennae a little shorter than the body, ante- 
rhinarial nearly double the length of the postrhinarial, the 3rd distinctly 
longer than the 4th ; wings hyaline, veins fulvous, stigma grayish, 2nd furcal 
