Aphididae of Formosa — I. 73 



'Cornicles. Cornicles longer than wide, nai'rowcd at the middle, about 

 2.4 times as long as wide at midlength. Cauda globular, al)Out as 

 wide as the cornicle constricted not strongly at the base, with 2 

 pairs of very long bristles which are not capitate. Anal plate some- 

 what deeply bilobed, with many normal bristles. 



Legs slender, with many short capitate and normal hairs. 

 Length of body — 1.6 mm. Antenna — 0.9") mm. 



Fore wing — 2.3 mm. 



Host. — Quercus dentata. 



Distribution. — Formosa (Taichyu). 



Many specimen^ were collected by Mr. K. Sawada in ]\Iareh, 

 1921. 



This species is distinct from all the species of 3Iyzocallis known 

 to me by the very prominent capitate hairs on the head and by the 

 ■antennal structure. 



Myzocallis bambuclfol'me n. sp. 

 Winged viviparous female 



Pale yellow. Eyes pale yelluwisb green. Antennae jiale yellow, 

 basal 2 joints blackish, basal third of the ord joint and apices of the 

 ord, 4tli and 5th black, the 6th dusky. Head with a longitudinal brown 

 line. Pronotum narrowly brown at eacii side, with a longitudinal 

 brown line at the middle. Mesonotum slightl}' brownisli at the front 

 angle, with a pair of longitudinal brown lines. Metanotuni with a pair 

 of black patches at the middle. The 1st— 7th abdominal segments 

 with a pair of distinct, black markings at the middle of the dorsum, 

 the 8th segment with a l:)lack spot on tlie dorsum. Cornicles and 

 Cauda yellow. Wings hyaline; stigma p-ale \'ellow, veins br(.)wn or 

 dark brown. Legs pale yellow; tarsi dusky. 



Body oblong, without prominent hairs. Head as long as the 

 prothorax. Frontal tubercles absent. Antennae long and .slender, 

 witji a few very small hairs; the 3rd joint with 5 or 6 \eiy small. 



