AriliniD.K i.)F FOKMOSA. 



21 



fa]ntcite hail's, A\-luch avo mostly ou tlio Ijasal half. Cauda larg<\ iiuK'h loiigei' 

 tliau tlie liiuil tarsi, alumst l.G times as loug as wide, somewhat o mstric'ted 

 olose to tlie base, with the apex rounded, provided with 5 pairs of lateral bristles. 

 Legs loog, provided with mauy rather long bristles; tarsi rather slender. 



Leugtii of body — 1.4 mm. Antenna — 1.7 mm. 



Cornicle — 0.5 mm. 



Described from the specimens from Formosa. 



Host. — Loidccra japonica 



]3istribution. — Formosa : Taihoku. 

 Japan : Tokyo. 



The Formosau specimens somewhat differ fro)u the Japanese ones in the 

 longer cornicle. 



Myzus persic3e (Sulz). 



(Fl. VU, A, figs. 1 k. 3) 



AViuged male. 



Head, eyes, antenna", and mesothorax bleck. Abdomen dark green. 

 Femora mostly black ; tiliiix; pale l)rown, with black apices ; tarsi black. 

 Wing-veins dark brown ; stigma rather pale lirowu. Cornicles pale greenish. 

 Cauda blackish ? Frcintjxl tubercles almost as iu the winged viviparoiLS female. 

 Aiiteuufe ver}- long and slender, witliout hairs ; the 3rd joint provided ^vith 

 about 50 rather small circular seu5oria scattered over the whole length ; the 

 4th somewliat imbricated, provided with about 22 very small sensoria over the 

 whole length, not arranged iu a row ; the 5th provided with about 22 simiLir 

 sensoria ; the relative leugtii of joints as follows : III — 62, IV — 52, V — 47, 

 VI — 105 (21 + 84). liostrum reaching the middle cosai as in the winged 

 viviparous female. Wings not dilluriug from those of the viviparous form, 

 ('oruicles very slightly shorter than the 5th autenual joint, almost 3 times as 

 long as the cauda, rather similar in shajxj to those of the vivip.arous form. 

 Cauda stout, much shorter than that of the winged viviparous form. 



Length of body — about 1.4 nmi: Antenna -2.2 jiim. 



Fore wing — 2.G5 mm. 



Thi'ee males were collecteil iu a colony ou Sol'inum mioiKjmn, ou March 

 21, 1922, near Taihoku. No oviparous females have been found. 



