IIoKi: Two New Si'Eciks of Aphids Pakasitic on Poi'LAk in Hokkaido I I5 



General measuremeuts : 



}!ody-leni;th 2.719-2.944 mm(av. 2.830 mm). Body-width 1.313-1.425 mm (av. 1.394 mm.) An- 

 tennae 0.453-0.506 mm (av. 0.468 mm). Rostrum 0.352 mm. Horn 0.103-0.169 (av. 0.140 mm). Wing- 

 pad o.(;94-o.938 mm (av. 0,811mm). Hind-tarsi 0.120mm. 



Food plant — Popliis Maxiviozoicaii 



Locality — Hokkaido (July 22, 1924, Leg. Mr. K. Osiiima, at Sapporo), 

 Honshu (June 23, 1917, Leg. Mr. G. JIarukawa. at Okayama). 



Observation s — This remarkable pulverulent species occurs in some large 

 colonies on the imderside of the leaves of Popiilus Maxhnozviczii without caus- 

 ing any obvious curl of the foliage. Materials collected by the above mention- 

 ed collectors were all alate forms and pupae. 



Co types— Deposited in the Entomological Museum of the Hokkaido Im- 

 perial University and the Hokkaido Agricultural Experiment Station. 



fC^^Jt-CgSTSi ilCLTio ^Ct»— Utt Mela7ioxatUhelium ItSSTZiOT'. lifcOliOKtifSI 

 r K D i* >> r 7' ? i J^Jig Dorap/iis Matsumura et HORI ICfiJ:f S t C"C'S> So 



Melanoxanthelium yezoeitse Hc5Ri K n -y ^7 7* 9 A y 



Doraphis popiili Matsumura et IlfjRl K" o 5» / 7 7' 5 /. V 



