138 KVOICIII TAKAIIASUI: 



(Distribution) 



Tills I.ipLis liiis 1)0011 rworeL'tl from Imliii ;iucl Jafxiu (Tokyo, Sapporo, 

 otc.) but novor collected in Foruuisa. 



Eiilacliuus piniformosaiius Talcuh. 



(Host plaut) 



Pinus sp. : the leaves are attacked. 



(Season when the species is abundant) 



Ne;U' Taih )ku this species is not uncommon from the last of September 

 until about the liejiinnini;' of March, occasiouaUv occurrin;^ in large numbers. 

 However its numlx;rs are greatly reduced fi'om uljout IMa^- throughout August, 

 dui-ing which period it is oftmi quite difficult to detect it in the field. 



(Winged viviparous female) 



The winged forms are ^ery rare, although they may make tlieir appearance 

 <'it any season. 



(]\Lde and oviparous female) 



Near Taihoku tliis sj^ecies is continuously vi\iixirou3 throughout the year, 

 not i^roduciug the sexual forms e^eu iu the winter. 



(Intermediate) 



A iew intermediates, which are not provided with wing-s, l)ut the thor;ix 

 are developed as in the winged forms, are sometimes produced. 



(Habit) 



This species docs not gi'oup densely and ■walks \-ery activol^• when distm'led. 

 The head is directed downwards when at rest. 



(Distiibuti( )n) 



Formosa: Taiiiokn, Kagi. 



Stomaphis quercus (L.) 



(Host i)kint^ 



(Jncrcns VdilnhllU : the stems are attacked. 



(Hea.son when the insect is common) 



Near 'J'okyo (his aphis was observed not uucomuuinly from tiie middle of 



