22 



E. Takahashi. 



joint:^ black. Legs pale hrowii: apices of feniom and tibiae, as well 

 as tarsi, lilack. 



Body oval, broadest opposite midlength of the abdomen, furnished 

 with a few short capitate hairs. 



Head with a few capitate hairs Avhich are a little longer than 

 those on the abdomen. Frontal tubercles prominent, with the inner 

 side somewhat convex. Antennae very long, imbricated, with some 

 short capitate hairs; the ord joint lacking sensoria; apical sensoria of 

 the 5th joint verj^ small; the relative length of joints as follows: 

 III-82, lV-64, V-44, ¥1-121(15+106). 



Rostrum stout, reaching the middle coxae. Body lacking lateral 

 tubercles. Cornicles long, imbricated, not reaching the caudal apex, 

 broadest" at the base, reticulated on the apical area. Cauda very 

 small, with a few long hairs. 



Legs very long and slender, with some short somewhat knobbed 

 setae. 



Length of Ijody — 2.0 mm. Antenna — 2.5 mm. 



Cornicle — 0.45 mm. 



Host. — A plant of the Polypodlaceae. 



Distributiun. — Formosa (Taihoku). 



This new aphis appears to be rather rare, since I have collected 

 only four wingless viviparous females in Taihoku during the season of 

 1920. 



Myzus arthraxoni n. sp. 

 Wingless viviparous female. 



bhining dark brown. Head yellowish brown. Eyes dark red. 

 The 1st and 2nd antennal joints pale yellow; the 3rd joint mostly 

 pale yellow, with the apex black; the 4th and 5th joints black; the 

 6th joint black, with the spur sometimes pale yellow. Cornicles pale 

 yellow, witii tiie bases and apices dusky. Cauda yellow. Legs pale 

 brown, apices of tibiae, and the tar.si pale dusky. 



