iMatsumuka : Niiw ApiiiüiNAi; ov Jai'AN. I? 



lcnt;tli of the cornicles. 



I.ciii^tli — 4 mm.; cxp. 12 mm.; antennae 4.3 mm.; cornicles o.S mm.; cauda 

 5. mm. 

 .\pterous \-ivii)arous female — DilTcrs from tlic winsred x'iviparons female as 

 follows : 



The 3ril anteiinal joint near the base with about 1 2 small sensoria, about 6 

 times as lontj as the postrhinarial. .Xbdomen on the sides wants fuscous spots; 

 Cauda cylindrical, at the apex conical. Tibiae somewhat paler in color. 



t.enijth — 3 mm. (excl. Cauda) ; antennae 4 mm.; cornicles 0.7 mm., cauda 



0.4 mm. 

 Hab. — Hokkaido ( Teshikaga in Kusliiro) ; in the middle part t)f August, 



1917, collected by the author. 

 F. P. — Hcmerocallis iniddendorßii ; attacking the upper part of the flower- 

 stem. 

 Noni. Jap. — Kzvauzo-tokknriabura. 



18. Rhopalosiphum ribis L. 



Aphis ribis L. Faun. Suec. p. 258, 975 (1761). 

 Rhopalosiphum ribis Koch., Aph. p. 39, f. 50, 51 (1857). 

 Hab. — Hokkaido (Sappoao) ; lün-ope, N, America. 

 F. P. — Ribes iitbniin ; attacking the under surface of the leaves, causing 



roundish tubercles. 

 Nom. Jap. — Sngiiri-tokhiriahnra. 

 I have caught at first the winged \i\'iparous species in tlie latter part of (une, 

 1917, in the Untanical Garden of our Im|)erial .'Xgaicultural College. Its habits 

 and structure do not differ practicall)' trom those of the Furopean species. 



19. Megoura dryopteridis n. sp. 



Winged viviparous female — Bod\ oblong, \'ellowish. .Antennae much longer 

 than the bod\', the 3rd joint w ith about 40 sensoria on the outer side, jjrovided 

 with a few short rigid hairs, the 4tli scarcely shorter than the 3rd, the 5th dis- 

 tinctly shorter, anterhinarial al)out 6 times as long as the postrliinari.il, the ()th 

 nearly as long as the 4th aud 5th joints combined, very slender, on each apex of 

 the joints somewhat infuscated. Wings hyaline, veins and stig.iia fulvous, the 



