APHID ID-E OF FORMOSA. QJ 



vivip;u'oui females, Imt lan sexual females. Of coiu'sc uo ti'ue sexnparae are 

 produced. 



The fall migrants of tin's sj^xjcies, wliich reinru to the winter Jiost, 

 correspond to the sexiiparae of some Aphididae, Imt thev o:ive l)irtli to 

 viviparous females, and not to oviparous ones. I will therefore give new name 

 " i^seudosexiiparae " to such vivipai'ous feiuales as the fidl migrauts of this apliis. 



Near Tokyo a few winged males ai'o produced ou the summer hosts iu 

 the fall, and fly to the winter host with the pseudosexuparae, hut sdou die 

 without mating, as no oviparous females are produced. 



These observations were made near Tokyo during 1917 — 1920. 



Dishibution. — Japan: Tokyo, Chiba, Chichibu. 



Amphorophora indicam (v. d. Goot) 

 (PI. m. 13, figs. 8—9) 



(Host plauts) 



EnscapJiis Japoidca and Staphylea hiamthfc iu Japau, liut unknown iu 

 Formosa (Many wingless viviparoirs females have Ijeen collected ou au unknowu 

 plant at Arisan, Formosa, ou Octol)Lr 10, 1918 K 



The under surfaces of the branches are attacked, suft'eiing very severely. 



(Se.asou wheu the insect is abundant) 



Near Tokyo it is rather common fi-om April to October, occning iu greatest 

 abundance from April to May. 



(Winged vi^-iparous female) 



The -ninged females ai'e to be fouud near Tokj^o only fi-om the luiddle of 

 May to the last of Jime. S )n:e nymplis of the winged form were obseiwed 

 j'i Arisau, Forruosa, in Octjlie.', 1918. 



(Male and oviparous female) 



The ovipar>jU3 females are always wingless, while the males are wiuged or 

 wingless, making their appearance, near Tokyo, fi-om the middle of October 

 to the last of November. The wingless miiles are as common as the wiuged 

 ones, and many intermediates of various degrees ai-e also produced. The 

 sexux^aa-ae are always wingless. 



(Intermetliate) 



