48 H. Takahaehi. 



Ap/ile salicicola, Monell, Bull. ."i. U. S. Geo]. Surv., y. 24 (1870). 

 Oestland, P.ul!. 4, Geul. Nat. Hist. Survt'y :\Iinm-..ta. p. 03 (1887); 

 Davis, .T..nr. Kc<.n. Riitom. III. p. 490 (lino); Davidson, .Inur. Econ. 

 Entoin. V. p 408 (1912); Patch, lUill. 21:5. :\raine Agr. Expt. St., p. 

 81 (1913). 



Aphis yanaf/icola. Matsumura, .Tl. Coll. .\gr. Sap])oro, vii. pt. (>, p. 

 390 (1917). 



Host. — Salix sp. 



Distribution. — Formosa (Tailioku) : Japan (Tokio, Papporo) ; 

 Europe; Nortli America. 

 Hitlierto unrecorded fron) Forinosa. 



In Formosa I have nevei' I'ouikI the sexual forms during the spring 

 and summer. 



Aphis (araresi Del Guercio. 



Aphis tavaresi, Del Guercio, Broteria, vii. p. 143, pil. xvi. Figs. 1-2 

 (1908): Theobald, Bull. Ent. Research, iv. p. 323(1914); van der Goot, 

 Contrih. Fauna. Ind. Neerland.. i. iii. p. 108(1917). 



Aphis citricola. van der Goot, MitteJ. Nat. Mus. 29, 2 Eieh. Jahrb. 

 Hamh. Wissen. Aust 29, pp. 273-273(1012): Essig and Kuwana, Proc. 

 Calif. .\cnd. Sc viii. p. 08 (1018). 



Myzvscitricidm. Shiraki, ;^^pt^i^#Sij^^ ^A§| (g;|t) p. 112 



(:>c]Ez:^) 



Hosts. — Citrus spp. 



Distriluition. — Formosa (Toihoku): Japan (Essig and Kuwana); 

 Java (v.d.C); Ceylon (v. d. (t.): Africa (Theohald) ; 

 Europe (Del Guercio); Cliile (v.d.G.) 



JIi/zus cilricidiis Kirkaldy (Proc. Hawaii JCnt. Soc-, i, pt. 3, p. 

 100, 1907) seems to be identical with this species, although iiis original 

 description is too brief to decide this possitively. 



Aphis povii De Geer. 

 Aphis poiiii, De Geer, Mems. 111. p. .j3 (1773): Gillette, Jour. 



