58 KVOICIII T.VKAII.V.SIU: 



Descriptions of some new or little-known 

 Japanese AphiJida:. 



Akkaia polygoni Takuh. 

 (I'l. Ill, A, %.s. 2~^) 



Iiisuct Wmia, (iifii, Jupuii, xxiii, No. 2«8, p. iiO. (1919). 

 A\'iiigIo3S viviparous female. 



Yellow or (>raiigo-}-el]o\v. Auteuuas aud legs pale yellow. Y.yc^ rod. 

 C'oniiflos, Cauda and aual plate concolorous with the body. Body oblong, 

 rather depressed, broadest at midlength of the aldomeu, without hail's. 

 Frt)nbil tubercles very large, aln.ost as loug as the 2ik1 auteimal joint, with 

 a proininout tutei'cle ou the inner side, which is aliuost as long ius the 2nd 

 auteunal joint, slightly curved towards the auteuiia, rounded at the apex, 

 provided with a few very shcjrt, slightly knobbed seta;>. Anttmnaa veiy short, 

 5-joiuted, somewhat imbricated, without hairs; the Ist joint juuch larger tiiaii 

 the 2nd, imbricated, with a short, stout blunt tubercle on the inner side; the 

 Srd lacking sensoria ; the relative length of joints as follows: III — 51, VI — • 

 li), ^' — 26 (14-1-12). lijsti'um roacking the middle coxa>. Abdomc^n not 

 reticulated on the dorsum, lacking lateral tuberclcMS ; the 7th segment with a 

 jiair of \ov\ small l)lunt tubercles at the middle of the dorsum, the Sth 

 segment with a small tubercle at the middle of the dorsum, this is a littlj 

 longer than those on the 7th segmeiit. Coruick^s ver^- large, projecting hori- 

 zoiitidly backwards beyond the caudal apex, somewhat imbricated and cm'ved, 

 brodest near the base, gTadually tajxiriug, norrowest at the tip; almost as 

 long lis the 3rd, 4th and 5th antennal jjint^ together, about 3.5 tinies as 

 long as the cauda. Cauda somewhat knobbed, witii 2 pairs of short lateral 

 biistles. Anal plate very Li'ge, projecting, re;ichiiig the middle or lieyond the 

 tiji of the Cauda. Legs slender, with some rather short set;e, tiu'si normal. 



Length of bodj" — 1.9 mm. Antenna — ^O.C5 mm. 



Cornicle — 0.5 mm. 



Host— Po///r/o/(?(/;t t/iUiihciyjii '.' 



Distribution. — Japan : Tokyo (Megmo). 



Thus aiihis is not unconnuon near Tokyo in June and July, sometimes 



