Aphididae of Formosa. — I. 91 



Winged viviparous female. 



Body oblong, almost without hairs. Eyes large, with small ocular 

 tubercles. Head with a pair of minute blunt tubercles which are 

 hardly visible. 



Antennae very short; the 3rd joint with 23-24, the 4th 7-10, the 

 5th lU-11 annulations; the relative length of joints as follows : III 

 —47, IV— ly. V— 25. 



Rostrum not reaching the middle coxae. Fore wings with the 3rd 

 oblique once forked, which is obsolete at the base and more slender 

 than the 1st; the 1st and 2nd obliques united at their bases; stigma 

 large; hind wings with 2 not parallel, long obliques; booklets 2. 



Cornicles very short, much shorter than those of the wingless 

 form. C'auda and anal plate almost as in the wingless form. Legs 

 slender, with some moderately long hairs. 



Length of body — 1.7 mm. Antenna — ^U.65 mm. 



Fore wing — 3.3 mm. 



Host. — Panicuvi patens. 



Distribution — Formosa (Taihoku. Urai). 



This aphis is distinguished from 0. panic! v. d. Goot by the 

 antennal structm'e. 



The wingless viviparous female of 0. panicola n. sp. has 3-6 

 circular wa.x glands on each side of the thoracic and abdominal segments 

 and '.) on tlie middle of tlie dorsum of the Sth abdominal segment. 



Cei'ataphis latanlac (Boisd.) 



Coccus lataniat. Boisd, Ent. horticole, p. 355, figs. 41)-5(J (1867). 



BoisduvaUa lataiiiae, Signoret, Ann. Ent. Soc. France, (4) viii, p. 

 400, pi. X, figs. 2, 2 A (1868). 



Cerataphis lataniae, Lichtenstein, Bull. Ent. Soc. France, II, p. 17 

 (1882); Buckton, Monog. Brit. Apliid, iv, p. 198, pi. cxxxiv (1883); 

 Embleton, Linn. Soc. Jour. Zool. xxiv, pp. 00-106, pi. xii (1903); 

 Fullaway, Ann. Kept. Hawaii Agr Expt. St., p. 44 (1910); van der 



