ArilTDID.E OF FORMOSA. 



15 



Ijftb, alujost as Lmg as tbo Srd antemial joiut, alwnt 1.7 iiincs as lou^ as the 

 canda. Cauda louti:, eusiform, provided witli 3 or 4 pairs of lat«'ral aud au 

 apical bristles. Legs very long aud slouder, provided with luauy moderatidy 

 loug setfe which are scarcely capitated. 



Length of body — alxiut 2 5 mm. Autt^uua — about 2.8 mm. 



Cornicle — about 0.7 n^m. 



Host, — MiscanfJtus $p., attacking the tlcjwer. 



DistributioD.^ — Formosa : Taihoku. 



Some wingless viviparous females were oljserved in the first week of 

 Decenaber, 1922. 



This species is closely related to IlacrosqjliMni smilacifoltce Takah. 

 (AphididiO of Formosa — 1, p. 12), but differs fi'o'.a it in the cauda which is 

 more stouter, as well as in the colour of the body. 



Macrosiphum paDderiae Takah. 

 (Tl II, A, fig, 11 k PL V, A, fig-s. 1—3) 



Aphichd:e of Formrsa— 1. p, 11, pi. II. 2. fi.-s 1—5 (1921). 

 Winged ^ivipar.jus female. 



Colour almost as in the wingless form. Wings hyahue. Head with some 

 long bristles. Frontal tubercles large, slightly convex on the inner .side. 



Antenna:) very loug aud sleuder, ■\\ith a few very .short hairs ; the 1st 

 joiut very large aud very slightly convex on the iuner side ; the 3rd provided 

 with 7 — 8 circular seiisoria of medium size aiTaugod in a row mostly on the 

 basal half ; tlie 4th slightly striate, lacking seusoria ; the relative length of 

 joints as follows: III— 83, IV— 69, V— 68, VI— 150 (24 + 126). Kosti-um 

 reacliing the middle coxa>. Abdomeu provided with sjme shorter bristles. 

 Cornicles cyliudrical, somewhat shout, almost as long as the 5th antennal joint, 

 scarcely dihited at the liase, slightly narrowed on the apical pjition, not im- 

 liricated, with the apices rouglJy reticulated, almost 6.5 times as loug as wide. 

 Wing-veius normal. Legs long aud slender, with many bristles. 



Length of body — 1.8 mm. Antenna — alxjut 3.0 mm. 



Cornicle — alxiut 0.5 mm. 



Tlie winged form w;is not kncjwn previously. 



