•J4 R- Takahaslii. 



as follows: [11-134, LV-92, V-73, VI-146 (53 + 93). Rostrum rather stout 

 reaching the middle coxae. Wings hyaline: the 1st and 2nd obliques on the 

 trout wing straight) the 3rd twice forked, the upper branch extending to the tip 

 of the wing, the 2nd hranch rather short: hind wings with 2 divergent obliques; 

 hooklets '■'> or 4. Abdomen on the dorsum furnished with a few setae, of which 

 those on the posterior part are longer. Cornicles large, stout, distinctly dilated 

 on about the distal three-fourths, somewhat expanded at the base, not imbricated 

 nor reticulated, a little striate at the tip, longer than the 4th. but shorter than 

 the 3rd antennal joint, about 2.5 times as long as the cauda, much stouter 

 than the cauda. Cauda constricted at midlength, slightly shorter than the basal 

 part of the last antennal joint, provided with 7 long bristles. Legs slender; 

 femora more slender than the cornicle; tibiae almost as stout as the 3rd antenna! 

 joint, provided with many rather long setae: hind tarsi shorter than the cauda. 

 Gonapophyses 3. 



Length of body — about 2.3 mm. Antenna — about 2.4 nun. 



Cornich — about 0.55 nun. Forewing — about 4.0 mm. 



Host. — Viburnum arbwicolum, attacking the young leaf. 



Distribution — Formosa : Tattaka (altitude about 730U feet) in Taichu- 

 prefectuie. 



A few winged forms were collected by the author on May is. 1924. An 

 aphis collected on Slahonta morrisonensis in May. 1924. at Tattaka seems to the 

 identical with this species, the apterous form id' which is described below. 



Wingless viviparous female. 

 Green. Antennae and lees mostly greenish. Cornicles green, with the tips 

 somewhat dusky. Cauda green. Bodv oval, slightly depressed. Head protruding 

 at the middle of the front, provided with a few short setae mi the dorsum. 

 Lye- rather small, protuberant. frontal tubercles distinct, somewhat shorter 

 than the 2nd antennal joint, moderately convex on the inner side. Antennae 

 slender, scarcely provided with hairs: the 1st joint slightly longer than the 2nd: 

 th'' 3rd ict imbricated, without sensoria; the 4th slightly imbricated; the 

 relative length of joints about fellows: IH-89, IV-57, V-47, VT-96 (364-00) 

 Rostrum rather stout, reaching the middle coxae. Abdomen provided with a 

 few short setae on the dorsum. Cornicles large, stout, distinctly dilated on one 

 -ide, net imbricated except at the tips, slightly shorter than the 3rd and 4th 



