Aphididae of Formosa. — I. jy 



Macrosiphoniella sanhorni. van der Qoot, Contiili. Fauna Ind. 

 Neerland. i, iii, p. 36 (1917). 



i& sgT}?ip ^mnmm mm^ (m^t) pi. ta, figs. 1-2, p. 32 



Hosts. — Chi'i/santhemuvi spp. 



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



Java (v. d. G.); Hawaii (Fullawaj'); Africa (Theobald); 



Europe, North America. 



Macrosiphoniella tanacetarium (Koch). 

 (PL. IX, 2, Figs. 1-5). 



Siphonophora tanacetai'ium, Koch, Die Pflanzl. p. 187, figs. 257-258 

 (1.S57). 



JIacrosiphum tanacetarium, van der Qoot, Beitrage Kenntnis. 

 Hulland. Blattl. p. 95 (1915). 



Host. — Artemisia vulgaris. 



Distribution. — Formosa (Taihoku Urai); Europe. 

 Hitherto unrecorded from Formosa. 



Key to species of Ifyzus. 



(1) Cornicles provided with some prominent hairs 



3f. polygoniformosanus w. sp. 



— Cornicles not provided with hairs (2) 



( ■!) General colour green M. pei-sicae (Sulz.) 



— General colour dark brown 31. arthraxoni t\. sp. 



— General colour white or pale yellow (3) 



— General colour 3'ellow or orange (4) 



(3) Body of the wingless viviparous female with many prominent 

 capitate hairs 31. formosartemisiae n. sp. 



— Body of the wingless \ivi]jarous female without prominent hairs. 

 31. hemerocaUis n. sp. 



(4) Cornicles reaching the caudal apex. ... 31. woodwardiae n. sp. 



— (.'ornicles not reaching the caudal apex. 31. polypodiacicola n. sp. 



