4 o6 S. MATSUMURA 
cauda, broader at the base, constricted near the mouth, cauda broad ; hind 
tibiae much robuster and longer than the preceeding pair, with long hairs, 
especially on the outersides ; stigmatic nervure of the wing originates near 
at the middle of the stigma. 
Genotype — Arimakia araliae Mats. 
This resembles also Myzus Pass, but differs from it in having broad and 
long hind legs and very short cornicles. 
48. Arimakia araliae n. sp. (PI. XVII, f. 3, a, b, c.) 
Winged viviparous female — Body dark green, oblong, in the middle 
constricted ; antennae, head, and mesonotum in the middle, fuscous ; antennae 
with long hairs, distinctly shorter than the body, the 3rd and 4th joints at the 
bases paler, the 3rd on the outerside with a few sensoria, much longer than 
the 4th, anterhinarial nearly 3^ times as long as the postrhinarial; wings 
hyaline, veins pale fulvous, stigma grayish, 2nd furcal near the middle of 
the first; abdomen oval, cornicles small, fuscous, cauda broader than the cor- 
nicles, at the base somewhat constricted; legs yellowish brown, tibiae at the 
apices, tarsi and femora, largely infuscated. 
Length of body 2.2 mm.; exp. tegm. 6.7 mm.; antennae 1.4 mm.; cor- 
nicles o. 1 5 mm. 
Apterous viviparous — Body dark brown, oval ; antennae much shorter 
than the body, the 3rd joint much longer than the 4th, the 4th subequal to 
the 5th, anterhinarial nearly 3 times as long as the postrhinarial, with long 
hairs; cornicles very small, at the bases broader; cauda large, cylindrical, in 
the middle constricted, at the apex rounded ; legs yellowish brown, tibiae at 
the apices, tarsi and femora, largely infuscated, hind tibiae (about i.mm. 
long) nearly \ \ the length of the middle tibiae, gradually curved towards 
the tips. 
Length of body 2.3 mm.; antennae 1.5 mm.; cornicles 0.1 mm. 
Hab. — Hokkaido (Sapporo). 
F. P. — Aralia cordata, Rhus vernicifera. 
