I 3 11. Takahaslii. 



dorsum. Head provided with 8 very short setae on the dorsum. 



Frontal tubercles slimier than those of the apterous form, moderately 

 convex on the inner side. Antennae long and slender, imbricated, with a few 

 very short setae: the 1st joint somewhat convex on the inner side; the 3rd 

 furnished with about from 30 38 circular sensoria of various sizes scattered over 

 the whole length : the 4th with from 10-18 rather small sensoria arranged almost 

 in a single row over the whole length : the .1th with from 4-7 similar ones 

 arranged in a sigle row: the relative length of joints about as follows : III-137, 

 IV-105, V-80, VI-180 (35+145). Rostrum reaching the middle coxae. Wing- 

 veins rather stout, venation normal: stigmatic vein rather strongly curved : hind 

 wings with 2 almost parallel obliques; hooklets 3 or 4. Abdomen provided with 

 a few very short setae on the dorsum. Cornicles long, slender, a little dilated 

 on the distal half, not or somewhat imbricated, not reticulated, about thrice as 

 long as the cauda, slightly shorter than the 3rd antennal joint. Cauda large, 

 very stout, gradually tapering, with 2 pairs of lateral bristles. Legs very long 

 and slender: tibiae provided with many moderately or rather long setae: hind 

 tarsi shorter than the basal part of the last antennal joint. 



Length of body — about 2.0 mm. Antenna — about 2.7 mm. 



Cornicle — about ()..") ram. Fore wing — about 3.5 mm. 



Host. — Antilbe longicarpa. 



Distribution — Formosa: Sankakuho (altitude about 7500 feet) in Taichu- 

 prefecture. 



Many apterous and a lew winged tonus were collected by the author in 

 Max, 1924. This aphis is not a. typical Myzus, resembling, in some characters, 

 Aiiiphorophorti or Fullawayella. However, ii seems to belong to Myzus rather 

 I ban to other proposed genera. 



Myzus polypodicola Takah. 



(PI. IV. A, figs. 7-8 & I'l. IV. B, rig. 5) 

 Aphididae of Formosa, part 1. p. 21 (1921): part 2. p. 82 (1923). 



Wingless viviparous female 



Body oval, not elongate, provided with a few very short hairs which are 



very slightly knobbed on the dorsal side, ami some longer bristles on the ventral 



surface. Head not *n th on the surface, furnished with about Id very short 



