48 R- Takaliashi. 



Rostrum (short, stout, nearly reaching the middle coxae. Meso-and metathoraci 

 and the 1st abdominal segment well defined; the 2nd and subsequent 5 

 abdominal segments fused together. Cornicles small, very short, not situated 

 on cones. Cauda very small, slightly constricted at the base, provided with a 

 few bristles. Anal plate small, bibbed, with a few bristles. Tibiae almost as 

 stout as the distal portion of the 3rd antennal joint, provided with some very 

 long tine hairs: tarsi not imbricated; hind tarsi as long as or slightly longer 

 than the 3rd antennal joint. Wax-pores not well developed, but numerous, 

 small, circular or oval, scattered over the dorsum of the body, not transparent 

 in specimens treated with caustic potash. 



Length of body — about 1.5 mm. 



Host — Arundinaria niitakayamensis, attacking the lower side of the leaf. 



Distribution. — Formosa: Tattaka (altitude about 7330 feet). 



Many apterous females were collected by the author on May 18, 1924. 



Oregma montana van der Goot ? 



Contrib. Fauna, hales. Neerland., 1, 3, p. 205 (1917). 



Host. — Bambusa stenostachya, Bambusa pachinensis, Arundinaria sp., 

 attacking the lower surface of the leaf. 



Distribution. — Formosa: Heito, Sakuraonsen near Musha; Java. 



Hitherto unrecorded from Formosa. 



The wingless viviparous females densely grouping on the host were found 

 in abundance on November 29, 1923, at Heito. A few winged and wingless 

 forms 'were observed on the same host at Heito on February 17, 1924. 

 Numerous apterous forms wire observed at Sakuraonsen near Musha in Taichu- 

 prefecture on May 15, 1924. 



These specimens agree exactly with the original description in many 

 characters, but differ from it as follows: 



(1) Body a little smaller. (2) Apterous form never yellowish. (3) Apterous 

 form provided with 0-4 very small wax-pores on the dorsum of the head. (4) 

 Apterous form provided with more wax-pores on the dorsum of the thorax. 

 (.">) Nymphs never yellowish. 



An Oregma previously recorded by the author as montana v. d. Goot 

 (Aphididae of Formosa, part 2, p. 52) is not true montana v. d. Goot, but is 

 pseudomontana Takah. 



