Matsumura : New Species and Genera of Callipterinae (Aphididae) of Japan i i ^ 



than the body, at the extreme base and at the apical one third fuscous, the 4th joint 

 distinctly longer than the 5th, the 3rd scarcely longer than the 4th and 5th com- 

 bined, the 6th subequal to the 4th, lacking distinct sensoria. Legs fulvous, post- 

 erior femora, bases of the same tibiae, as well as the tarsi, fuscous. 



Length — 1.2 mm.; antennae i.o mm. 



Hab. — Hokkaido (Koshimizu in Kitami) ; many specimens collected by 

 the author. 



F. P. — Populus sieboldi (Hakoyanagi), attacking the shoot. 



Date of Coll. — Aug. 15, 19 17. 



Nom. Jap. — Doro-shinime-keabura. 



15. Chaitophorus dorocolus n. sp. 



Winged viviparous female — Much resembles C. populi sieboldi Mats., but 

 differs from the latter in the following points : — 



Antennae with much less hairs, the 3rd, 4th and 5th joints distinctly shorter, 

 anterhinarial nearly 2\ times as long as the postrhinarial, the 3rd joint with about 

 7 large indistinct sensoria. Wings narrower, veins much robuster, stigma nearly 

 4 times as long as broad, stigmatic vein opening at rather nearer to the apex. 

 Abdomen narrower, cornicles longer, fuscous, at the base paler. 



Length — 0.9-1.2 mm.; antennae i.o mm.; exp. tegm. 4-4.4 mm. 

 Apterous viviparous female — Body much narrower; antennae at the basal half 

 fulvous; thorax and abdomen above lacking fulvous stripe. 

 Length — 1.3 mm.; antennae 0.9 mm. 

 Hab.- — Hokkaido (Teshikaga in Kushiro); many specimens collected by 



the author. 

 F. P. — Populus sieboldi (Hakoyanagi), on the under surface of the leaves, 



covered with woolly secretion. 

 Date of Coll. — Aug. 11, 1917. 

 Nom. Jap . • — Doro-wata-keabura. 

 This species resembles also C. japonica Ess. et Kuw., but differs from the 

 latter especially in the relation of the ante- and postrhinarial. 



