ii'j K. T^ikahashi. 



lateral in'istles. 



Lengili uf bull}- — 2. mm. Antenna — 1.4 mm. 



Fore Aving — 2.(i rum. Width of fore wing — l.Unim. 



Cornicle — about U. 23 mm. 

 Host. — Papaver somnlferum, attacking the leaf. 

 Distribution. — Formosa (Ako, Kagi). 



In Yovmoas. 31 ijzus jyerslcae {^vl\z.). RhojMlodphum papaveri u. sp. ; 

 Yamataphls papaver i n. sp. and Aphis gossypli Glov. are found on 

 Papaver som?iiferum, one of the most important cultivated plants in 

 Formosa. 



Rhopalostpimm papaver i, sometimes occurs veiy abundantly on the 

 leaves and stems. 



Rhopalosiphum lahorensh (Das.) 

 Steplienosia lahorensis. Das, Memoirs Indian Mus. vi. 175 (li<],^). 

 Host. — Artemisia vulgaris, var. indica ; Siegesbeckia m-ienUxlis f 

 Distribution. — Formosa (Taihoku); India (Das). 

 Collected by Mr. Sueta. 

 Hitherto unrecorded from Formosa. 



The Formosan specimens exactly agree with Mr. Das' s description 

 and figures. 



Key to Formosan sj)ecies of Cavariella. 



(1) Antennae 6-jointed CW/Zcfwe/o/a (Essig et Kuw.) 



Antennae 5-jointed (2) 



(2) Milk white C. araliae n.'i^\>. 



Green C. neocapraew. sp. 



Cavariella bicaudata (Essig et Kuw.) (PL. ix, 1, figs, l-'.l) 

 Siphocoryne bicaudata, EssijJ and Kuw. Proc. Calif. Acad. Sc. 4th 

 series, viii, No. 3, p. 64(1918). 

 Host. — Saliz spp. 



