4 i2 s - MATSUMURA 
cles cylindrical, short and very slender ; cauda shorter than the cornicles, but 
broader ; legs slender and shorter, the hind tibiae nearly one third longer 
than the middle ones. 
Type — Yezaphis sasicola Mats. 
55. Yezaphis sasicola n. sp. 
Apterous viviparous female — Body broad-fusiform, black; antennae yel- 
low, the basal 2 joints and frontal tubercles black, anterhinarial nearly 4I 
times as long as the postrhinarial ; pronotal tubercles yellowish, longer than 
broad ; abdomen broadest in the middle, with a few short hairs; cornicles at 
the base somewht constricted, with some curved hairs ; legs black, tibiae and 
tarsi yellow. 
Length of body 1.5 mm.; antennae 1.2 mm.; cornicles 0.1 mm. 
Hab. — Hokkaido (Sapporo). 
F. P. — Sasa paniculata. , 
Nom. Jap. — Sasa higeboso-abura. 
15. Yamataphis n. gen. 
Allied to Toxoptera Koch., from which it differs as follows : 
Antennae : 5-jointed, much shorter than the body, the 3d joints long, on 
the whole surface with some roundish sensoria, the 4th very short, as long as 
the first 2 joints taken together, the 5th the longest, anterhinarial very long, 
nearly 9 times as long as the postrhinarial. 
Cornicles : shorter, near the apices somewhat dilated, the mouth funnel- 
shaped. 
Cauda : small, somewhat conical. 
Wings : stigma nearly 8 times as long as broad as in the middle, both 
ends being sharply pointed stigmatic nervure originating nearly at 3/4 of its 
whole length near the apex, hind wings with 3 booklets on the costa. 
Genotype — Yamataphis oryzae Mats. 
