Aphididae of Formosa. — I. " < 



Distribution. — Formosa (Tailioku); Japan (Tokio, Saitania). 

 Hitherto uiirecordt'd from Formosa. 



Cavai'iella araliae u. sp. (PL. xiii, 2, fig. 1) 

 Wingle.ss viviparous female. 



Milk wliite. Eyes red. Antennae white, with tlie last joint 

 slightly dusky. Legs white, witli t!ie tarsi slightly dusky. Cornicles 

 and Cauda wliite. 



Body oval, witliout hairs. Front rounded. Eyes rather small; 

 ocular tuhercles small. Frontal tubercles absent. Antennae short 

 and slender, without hairs, 5-jointed; the 3rd joint without sensoria; 

 the relative length of joints as follows : III— 35, IV— 11, V— 27 (10 + 

 17). Rostrum reaching be3'0ud the middle coxae. Body without lateral 

 tubercles. Cornicles imbricated, slender, reaching a little beyond 

 the caudal apex, somewhat dilated on the distal portion. Abdomen 

 just above the cauda with a horn-like tubercle, which is a little shorter 

 than the cornicle, reaching a little be}^ond the cornicle, 



Cauda wedge-shaped and broad, with 2 slight constrictions, and 2 

 pairs of lateral bristles present. Legs moderatel}' long, with some 

 short setae; tarsi normal. 



Length of bodj- — 1,7 mm. Antenna — 0.7 nun. 



Cornicle — 0,3 mm. 



Host, — Aralia spinosa. 



Distribution — Formosa (Urai, Kwannonzan), Japan (Tokio) 



This aphis was collected by the author on the young leaves of the 

 host in Januarjr and Fel;)ruarv 1921. 



Cavarietta tieocaprae n. sp, (PL, ix, 1. figs, 10-16). 

 Winged viviparous female. 

 Described from specimens preserved in alcohol. 

 Head and mesothorax blackish brown. Abdomen yellowish 

 brown, with the middle part of the dorsum dark. 



