fiO R- Tak.ilmsl.i 



Tjcngth of liofly-alouf, 1.5 mm. Antenna -about 0.7 mm. 



Wingfd male. 

 Antennae imlirientod, jvi-ovided witli a few sliort li.airs; the '^v<\ joint provided 

 with ahont IS very largn and small snljcircular sensiria scattered over tlie whole 

 length, the 4th with 4-G rather small cirenlar sen.soria not arranged in a single row, 

 the 5th with 5-10 simjlar sem'oria, the Oth with about 2 on the basal part; the rela- 

 tive length of joints abont as follows: 111-70, IV-30, V-33, VI-90 (21+70). 

 Hind wings with only one oblique in tlie only specimen in my collection; booklets 2. 

 Cornicles smaller than those of the fcjnale, ne.nrly twice as long as wide, much short- 

 er than the base of the last anteunal joint, (^auda shorter and stouter ihui that 

 of the female. Legs slender, provided with some rather long brisiles; hind tarsi 

 slightly shorter than the 4th antenna! joint. 



Length of body-about 1.25 mm. Antcnna-abont 1.2 mm. 

 Fore wing about 1.7 mm. 



nost.-CJieuopodium fdhum, attacking the njiper side of the leaf. 

 Distribution.-Formosa : Taihoku. 



India (Das); North America. 

 Hitherto unrecorded from Formosa. 



Some wingless and two winged viviparous females and their nymphs and a 

 winged male were collected on March 26, 192:^, near Taihoku, by the author. No 

 oviparous females were discovered. 



The Formosan specimens differ somewhat from the description of Das. 



Brachycolus heraclei Takah. 



Aphididae of Formosa-!, p. 60 (1921); Aphididae of Formosa-2, p. 112 (192:^). 



Nymph. 



(The first instar). Green. Head slightly dusky. Eyes black. Antennae 

 and legs dusky. Cauda green. Cornicles slightly du.sky. Body oblong, a little 

 more than twice as long as wide, covered with a very slight powder, almost without 

 hairs. Head provided with a few minute setae. Frontal tuLei-des lacking. Eyes 

 .slightly protuberant, with the ocular tubercles very small. Antennae very short, 

 much shorter than tlie body, almost as long as the hind tibia and tarsi taken 

 together, 4 or 5-jointed, provided with a few very small hairs; the 1st joint much 

 larger than the second; the 3rd slightly imbricated, the sensorium small; the 4th 

 imbricated; the relative length of joints as follows: ITI-20, IV-20 (8+12). 

 Eostrum almost reaching the bind coxae. Body without lateral tubercles Ab- 



