Aphididae of Formosa. — 4. lo 



Myzus sakurae Mats ? 



(PL 1. A. figs. LO-11 and PI. 1. B, figs. 3-5) 



Jl. Coll. Agric. Sapporo, vn. pt. 6, p. 403 (1917). 

 Wingless viviparous female 



Yellow. Antennae yellow, with the apex of the 5th joint and the 6th 

 dusky. Cornicles and cauda yellow. Legs yellow, apices of tibiae, and tarsi 

 dusky. Body oval, scarcely provided with hairs. Head not smooth, provided 

 with a few very short setae on the dorsal side. Frontal tubercles large, almost 

 as long as the 2nd antenna! joint on the inner portion, distnetly gibbous on the 

 inner side. Antennae slender, imbricated, with a few minute setae: the 1st joint 

 mueh larger than the 2nd, convex on the inner side: the 3rd without sensoria; 

 the 5th with the primary sensorium small: the relative length of joints about 

 as follows: 111-65, IV-40, V-32, VT-92 (18 + 74). Rostrum reaching the middle 

 coxae. Abdomen not reticulated on the surface, almost without hairs on the 

 dorsum. Cornicles long, cylindrical, somewhat expanded on the basal portion, 

 very slightly or scarcely dilated near the tip, not curved, imbricated, not 

 reticulated, almost as long as the distal |>art of the last antenna] joint, more 

 than twice as long as the cauda. Cauda rather large, stout, tapering, longer 

 than wide, with 2 pairs of lateral bristles. Legs long and slender, tibiae almosl 

 as stout as or slightly stouter than the 3rd antenna] joint, but much more slender 

 than the cornicle, provided with many moderately long or rather short setae: 

 front tibiae longer than the cornicle; tarsi somewhat imbricated; hind tarsi 

 almost as long as the basal part of the last antenna] joint. 



Length of body — about 1.5 mm. Antenna — about 1 .5 nun. 



Cornicle — about 0.4 mm. 



Winged viviparous female 

 (Colour notes from specimens preserved in alcohol). Yellow. Head dusky 

 on the dorsum. Antennae blackish, paler at the base of the 3rd joint. Thorax 

 black. Abdomen with 4 large dusky patches on the side and some dusky patches 

 on the dorsum. Cornicles yellow. Cauda somewhat dusky. Legs pale yellowish, 

 dusky on the distal halves of femora, apices of tibiae, and tarsi. Wings hyaline, 

 very slightly clouded along the 1st and 2ml obliques on the front wing; stigma 

 pale gray: veins brownish, the 1st and "2nd obliques darker. Head provided 

 with 8 very short setae on the dorsal side. Frontal tubercles very short, moderately 



