Aphididae of Formosa. — I. 27 



reaching near tlie caudal apex, longer than the 3rd antennal joint, 

 dightly broadened at the base. (^!auda stout, l)roadest at the base, 

 tapering, without constrictions, with 2 pairs of stout lateral bristles. 

 Legs very long and slender, tibiae provided with many setae, a few of 

 which are knobbed. 



Length of bod}' — 1.7 mm. Antenna — 1.7 mm. 



Cornicle — 0.22 mm. 

 Host. — Artemisia vulgaris, var indica. 

 IHstribution. — Formosa (Tailioku). 



Collected by jNIr. Sueta. 

 This new species is very closely related to Ckqiitojihorus chiy- 

 santkeml Theob. from Africa, but differs from the latter in lacking a 

 tul)ercle aliove the cauda of the wingless viviparous female. 



Phorodon huviuU (Sc\\ra.n\i). (PL. XIV, 1, Fig. 4). 

 Aphis humuli, Schrank, Faun. Boic. ii, p. 110 (1801). 

 Phorodon humuli, Buckton, Monog. Br. Aphid., i, p. 100(1875); 

 Thomas, Nat. Hist. Illinois, Bull, ii, p. 9 (1878): Riley, Insect Life, 

 p. 70 (1888); Remisch, Zeitschr. f. Insekt. Biol., p. 241 (1911); van 

 per Goot, Holand. Blattl. p. 132 (1915); Matsumura, Jl. Coll. Agr. 

 Sapporo, p. 302 (1917); Swain, Univ. California, Tech. Bull, iii, 3, 

 p. 79 (1919). 



Phorodon cannabis, Das, Mem. Indian Mus. vi, p. 109 (1918). 

 Host. — Hwmulus japonicuTn. 



Distribution. — Formosa (Taihoku); Japan (Tokio). India (Das); 

 North America; Europe. 

 Hitherto unrecorded from Formosa. 

 Collected hj Mr. Kui'osawa in March 1921. 



Key to Formosan species of AmpJiorophora. 

 (1) General colour orange, cornicles black. Winged females without 

 sensoria on the 4th antennal joint. ... A. indicum (v. d. Goot). 



