Aphididae of Formosa. — I. ' " 



Body with many veiy long rather stout hairs. Antennae witli 

 some very long liairs; the 3rd joint slightly imbricated on the apical 

 portion, without sensoria: the Bth joint with 0-2 hairs; the relative 

 length of joints as follows: III— SO. IV— 42, V— 35, VI— 08 (1 + 52). 

 Rostrum short, not reaching the middle legs. Cornicles short and 

 rather stout, very slightly longer than wide, not as long as those of the 

 winged form. ( 'uuda very short, much wider than long, not constricted 

 at the base, with the posterior margin l)roadly r(,iunded- 



Legs rather stout, witli many very long bail's: tarsi iml)ricated, 

 with 2 transparent empodial hairs. 



Length of body — 2.5 mm. Antenna — b>S inm- 



Winged viviparous female. 



Head, eyes, thorax and cornicles black. Antennae pale brown, 

 the apical halves dusky. Abdomen reddish brown, with blackish 

 bands on the dorsum. Legs pale brown; apices of fore tibiae, apical 

 halves of middle and hind femora and tibiae, and tarsi black. Wing- 

 veins brown, stigma pale brown. Body with many very long bail's. 

 Antennae with some very long hairs; the 3rd joint provided with 4.5-50 

 circular or oval sensoria of various size scattered over the whole lengh; 

 the 4th joint with 2-5 sensoria in a row on the basal half; the 5th joint 

 with an apical sensoria; the 6th joint with 0-1 long hair; the relative 

 length of joints as follows: III— 110, iV— 4<s, V— 48. VI— 80(18 + 02). 



Rostrum rather stout, not reaching the middle legs. Wings with 

 the 3rd oblique twice forked, obsolete at the base; hind wings with 2 

 not parallel odliques: booklets 5. 



Cornicles twice as long as wide, broadest at the base, shorter than 

 the hairs on the abdomen, reticulated. Cauda almost as in the wingless 

 form. Legs long and slender, with many ver}' long hairs; tarsi imbri- 

 cated, with transparent empodial hairs. 



Length of bodv — 2.8 mm. Antenna — 2.0 mm. 

 Fore wing — 4.35 mm. 



