APHIDID.B OF FORMOSA. 33 



FuUawayella formosana Tiikali. 

 (PI. l\, v., fig. 4) 



Aphididac of Foivuosu— 1, p. 29 (1921'. 



WiugiC'SS viviparous feii.ale. 



ShiuiDg black. Ho.'id brownish lilack. Eves black. Autenuae black, 

 ■with the 3rcl joiut yellowish browu. Cornicles lu-<jwuish IJack. Cauda dark 

 brown. Femora black, brownish at the bases, tibiae yellowish brown, with 

 the apices black ; tarsi black. Body almost without hairs. Frontal tuljercles 

 conspicuous, with the inner sides promineutly converging. Antennae very long 

 and slender, somewliat imljricated, with a few very small hairs ; the 1st joint 

 nauch larger than the 2nd, moderately convex on the inner side ; the 3rd 

 lacking sensoria ; the 5th with a small apical .seusorium ; the relative length 

 of joints as follow.s : 111—75, IV— 53, V— 44, VI— 86 (20+66). Rostrum 

 reacliiug beyond the middle coxae. C'ornicles scarcely imbricated, moderately 

 dilated on the distal twi> thirds, slightly dilated on the liase, shorter than the 

 5tli antenual joint. Cauda large and stout, wider than the cornicle, broadest 

 at the base, gradually tapering, almost without constrictions, the a]x?x rounded, 

 about one haK the length of the cca-nicle, with a few short lateral In-istles. 



Leg's long and slender, provide;! with son.e setae. 



Length of l)ody — about 1.7 mm. Antenna — about 2.2 una. 



Cornicle — aljout O.o mm. 



Winged viviparous feruale. 

 Head blackish brown. Eyes l)lack. Antennae black, brownish on the 

 basal half of the 3rd j<jiut. Prothorax and abdtimen blackish brown. Meso- 

 thorax brownish lilack. Wings along the veins l^roadly cloudel with fuscous; 

 stigma gi'ay ; veins lilackish. Femora black, brow nish at the Imses ; tibiae 

 imle browu, with black apices ; tarsi black. Cornicles and cauda brownish 

 black. Antennae long and slender, almost without hairs ; the 3rd joiut provided 

 with about 30—35, the 4th 15—20, the 5th 2—5 circular or slightly oval 

 sensoria of medium or rather Large size scattered over the whole length, apical 

 seusorium of the 5th large, circular ; the relative length of joiuts as follo^\■3 : 

 m— 80, R'— 61, V— 51, VI— 107 (23t-84). 



