22 IJMiUHI rVKAIIASlIF: 



Myzus formosanus u. sp. 



il'I. \ ir, A, ligs. 4—5). 



A\'iuj<less viviparous female. 



I>.iik liiowii. I'yes bliickish browu. AntenniXi pale biMwu, jijx^x ui the 

 4th juiut, and tlie atli ami (!tli black. Coniieles aud Cauda iibuost black, 

 somewhat l>n)wiiish. liC^s ))ale brown, tarsi soniewluit dusky. Bo<ly oval, 

 slightly narrowed. Tb<ad ])r(i\id('d with sonic rather short liaire w'hich are not 

 kuobl ed. I'Vontal ttibercks di^itiuct, moderately convex on the inner side. 



.Vntenna; imbricated, jirovidel with a few very small hair? ; the 3rd joint 

 lacking sensoria ; the relative length (jf joints a? follows : III — I3G, IV — 22, 

 V — IJ^, \'I— 57 (II • 4(>). ll)strum reaching the middle cox;e. 



Tjiteral or dorsal tubercles a1>sent. Abdoiiiinal segments ])rovidcd with 

 some rather .'iiioit normal bristles arranged in a transverse ruw on the dorsum. 

 Cornicles rather slioi-t and st.jut, imbricated, uot reticulated, broadest at the 

 bii^e, .somewhat tjiixiring, sometimes very .slightly curved, shorter thiUi the 3rd, 

 but a little longer than the 4th antennal joint, t'auda not stout, almost as 

 long as the 5th antennal joint, broadest at the base and bT,{x>ring when .seen 

 fi-tim above, with 2 slight Cdnstrictioas, provided with 2 or 3 jiaii-s of later.d 

 bristles. TiOgs m(Hlerately li'ng, ])ni\idctl with s )n,»> rather shoit .set;f ; tiiBi 

 rather short. 



Ijciigth of IkkIv about l.S mm, .Vntcnua — about 1.0 mm. 



{'ornide 0.2 mm. ('auda().12 mm. ' 



Host. Ful iirjmmm ihiiumsix. 



Distribution. - Formasa : Tailmkn. 



Myzus menthae (Uuckton). 



(,i'i. VIII, r., figs, i^-ti) 



Sij>]t<m(^l>lii,rii 'iwntliiv. ISuckt'ii, Monog. r>ritish .\phid. 1, p. 120, yl. IX, 

 fig. 1- 2 (1875). 



riiorodim vuHthce, van der (Joot, Keimtuis Holland Blattl, p. 134 (1915). 



Wingless viviparoas female, 

 l^ark given. Head ]iile greenish. Eyes black, somewhat I>rowni3h. 



