2 ' ^i\ n- II >f= m n 3!A sp. n CO m n i -- yt -c 



T.ength — 1.8 mm.; exj). 6 mm.; cornicles 0.15 mm.; caurla 0.08 mm. 

 Hab. — Hokkaido (Kushiro) ; in the early part of June, 1917, collected b\' 



the autlior. 

 V. P. — .bigelica insina, suckiii;^'' the juices of the flowers. 

 N. J. — VesflnK-aimra. 



2. Macrosiphum cercidiphylli n. s\\ 



\\'inf:^ed \'i\'iparous female — Pale yellowish. The 3rd antennal joint with 

 about 12 roundish sensoria on the outer side, the other joints lackini:^ sensoria ; 

 anterhinarial about 5 times as long as the postrhinarial ; apices of the 3rd to 5th 

 somewhat infuscated. Wings hyaline, stigma and veins pale testaceous, 2nd furcal 

 near the iniddle of the first. Cornicles nearly as broad as the tibia, nearly one- 

 half the length of the posterior femur and somewhat curved near the base. Caud 

 conical, nearly as broad as the femur. Apices of the femora and tibiae, as well as 

 the tarsi, fuscous. 



Length — 1.8 mm.; exp. 7.2 mm.; cornicles 0.5 mm.; cauda 0.1.5 mm.; an- 

 tennae 2.8 inm. 

 Apterous viviparous female. Differs from the winged viviparous female as 

 follows : 



The 3rd antennal joint vvitli a row of indistinct sensoria, 2 or 3 at the base 

 being distinct; 'apices of the antennal joints and femora at the apices are not in- 

 fuscated. Tibiae at the a[Mces, and the tarsi, fuscous. 



Length — 2.[ mm.; antennae 2.8 mm.; cornicles 0.5 mm.; cauda 0.2 mm. 

 }Tab. — Hokkaido (Sapporo) ; on the 2nd, Jul\% 1917, collected by the author 



at Maruyama-Park. 

 K. P. — CcrcidipJiyllnm japonicuni ; on the under surface of the leaf. 

 Nom. Jap. — Katsiira-Jiigenagaabura, 



3. Macrosiphum giganteum " sp. 



Winged viviparous female — Much resembles M. gobouis Mats., but differs 

 from the latter as follows: 



l^ody much larger. The 3rd antennal joint on the outer side with about 32 

 sensoria in a row. Wings more yellowish, stigma infuscated, veins more robust 



