Aphididae of Formosa. — 1. g 



Wingless females provided witli about 1 to 10 seiisoria near the 



base of the 3rd antennal joint. ... , (3) 



(-?) General colour red 31. formosanum \\ . sp. 



General colour brownish black M. (/odonis Mats. 



(3) Cornicles very long and slender, reaching far beyond the caudal 

 apex JI. neoariemisiae n. sp. 



If 



Cornicles not as long as above (4) 



(4) Cornicles almost not imbricated 31. paederiae n. sp. 



Cornicles distinctly imbricated (o) 



(5) Cornicles not at all reticulated 31. pis I (Kali.) 



Cornicles with at least the tips reticulated (tJ) 



((')) Spur of the last antennal joint of the wingless viviparous female 



as long as or longer than the 3rd joint (7) 



Spur of the last antennal joint of the wingless viviparous female 

 shorter than the 3rd joint 31. rosae (L.) 



(7) Cornicles almost reaching the caudal apex (8) 



Cornicles not reaching the caudal apex 31. alopectdl n. sp. 



(8) Spur of the last antennal joint nmch longer than the ord jtiint. 



31. similacifoliae n . sp. 



Spur of the last antennal joint as long as the 3rd joint. 

 31. misccmt/d n. sp. 



3facrosiphum gobonis Mats. 



Matsumura, Jour. Coll. Agr. Sapporo, vii, pt. (J, p. 395 (l'J17). 

 3Iaci-osiphum soUdaginis, Maki, Agr. Expt. St. Formosa, IjuU. 103, 

 p. 11 (I'JKi). 



Hosts. — Arctium lappa, Clrsium Japonicum, Crepis japoiiica. 



Saussurea affinis. 

 Distribution. — Formosa (Tailioku, Kagi, Shirin, Urai, Kiirun); 



Japan (Tokyo, Sapjioro). 

 This aphis is one of the most common species in Japan and 

 Formosa. Near Tokyo, tlie winged forms may be found almost 



