Aplndidae of Formosa— 4. 51 



other species of Cerataphis, O. lataneae Boisd., C. Jreycinetiae v. d. Goot and 

 G. forrnosanus Takah., by the 5-jointed antennae. 



Aleurodaphis mikaniae n. sp. 

 Wingless viviparous female 



Differs from A. blumeae v. d. Goot in the following characters : 



(1) Rostrum shorter, usually reaching the middle coxae. 



(2) Antennae longer, 5-jointed, the relative length of joints about as follows: 

 111-40, IV-20, V-33. In A, blumeae they are 4 or 5-jointed, with the 3rd joint 

 shorter. 



(3) Wax-pores on the margin of the body more in number (about 180 in all). 

 In A. blumeae they are about 120 in number. 



Length of body — about 1.6 mm. Antenna — about 0.5 mm. 



Host. — Mikania scandens, attaking the stalk. 

 Distribution. — Sakuraonsen in Taichu-prefecture. 



Numerous apterous females quite densely grouping were observed in 

 abundance on May 15, 1924. This species is reddish brown in colour. 



Astegopteryx cuspidatae Essig et Kuw. 



Nipponaphis cuspidatae, Essig and Kuwana, Proc. Calif. Acad. Sc., 4th 

 series, vm, p. Ill (1918); Takahashi, Bull. Brooklyn Ent. Hoc, XV, No. 4, p. 

 116 (1020). 



Astegopteryx cuspidatae, Takahashi, Aphididae of Formosa, 2, p. 149 (1923). 



Host. — Quercus stenophylloides. 



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

 prefecture ; Japan. 



Hitherto unrecorded from Formosa. 



Many apterous females cemented to the branches were collected by the 

 author on May 20, 1924. 



Astegopteryx sp. 



Wingless viviparous female 

 Black; eyes, antennae, legs, cauda, anal plate and bristles black, with 

 white wax on the whole margin of the body. Body flattened, very hard, 

 provided with about 25 long, very stout bristles. Head very wide on the front. 



