30 K. Takahashi. 



(11) Cornicles with the surface reticulated G. quercifoliae Takah. 



Cornicles not striate nor reticulated G. myricae n. sp. 



(The winged form of G. quercifoliae Takah. is nut known). 



Greenidea kuwanai Perg. 



Trickosiphum kuwanai, Pergande, Ent. News, p. 209 (1906); Okajima, 

 Bull. Coll. Agr. Tokvo Imp. Univ., vxn, 1, p. 2 (1908); Essig and Kuwana, 

 Proc. California Acad, gc, 4th series vm, 3, p. 97 {1918); Takahashi, Dobutsu- 

 gaku Zasshi (Zool. Mag. Tokyo). No. 359, p. 368 (L918): Kurisaki, Dobutsugaku 

 /as hi. No. 386, p. .".79 (1920). 



Greenidea kuwanai, Takahashi, Proc. Ent. Soc. Washington, x.xi, 7, p. 174 

 (1919) and Aphididae of Formosa, pt. 2, p. 117 (1923). 



Hn^t. — Quercus stenophylloides, attacking the young shoot. 



Distribution. — Formosa: Sakuragamine (altitude about 8000 feet) in Taichu- 

 prefecturc. Japan. Siberia. 



Hitherto unrecorded from Formosa. 



Many apterous viviparous females were collected by the author on May 

 20, 1924. These specimens agree exactly with those from Japan. 



Greenidea tattakana n. sp. 



(PI. Ill, B, tigs. 1-3) 

 Closely allied to G. nigrqfasciata Maki, differing from it. however, in the 

 following characters : 



Wingless viviparous female 



(1) Hairs on the body somewhat shorter, less stout. 



(2) Antennae shorter, with the hairs fewer and somewhat shorter. 



(3) The 3rd antenna! joint shorter. The relative length of antennal joints about 

 as follows: 111-80. IV-36, 7-45, VT-85 (35 + 50) (In G. nigrnfasciaia, III-115, 

 IV-45, V-50, VI-33 + 59). 



(4) Cornicles shorter, with somewhat shorter hairs. 



Length (if body — about 2.4 mm. Antenna — about 1.25 mm. 



( Jonicle — about 0.65 mm. 



Winged viviparous female 

 (1) Abdomen almost duaky on the dorsum except on the ba al portion which 



