Aphidldae of Formosa.— 3. J,OJi 



follows: III-90, IV-GO, V-50, YI-125 (30+95). Rostrum reaching the niid.lle 

 coxae. Abdomen without tubercles, scarcely provided with setae. Cornicles very 

 stout, cylindrical, somewhat ex]>anded toward the lase, not dilated at the Ixise, sca- 

 rcely curved, somewhat imbricated, not reticulated, about 4 or slightly more times 

 as long as wide, almost as long as the 3rd antcnnal joint, about twice or slightly 

 more times as long as the cauda. Cauda very stout, longer than wide, tapering, with 

 the apex rounded, with 2 slight constrictions, furnished with 2 pairs of long lateral 

 bristles. , ^ ,y 



Legs rather stout; tibiae stouter than the antenna, with many moderate or 

 rather long normal setae; hind tarsi almost as long as, or shorter than, the bvsal 

 part of the last antennal joint. ,.;„: j,^, i-;;..;,,;! 



Length of body-about 1.7 mm. Antenna-about 1.8 mm, . !.,.•*'! 



Cornicle about 0.4 mm. :■■. n-yi 



Winged viviparous female, ..,i-'.^ 



Head on the dorsal surface furnished with about 10 very short scarcely knobr 

 bed 8etae. Frontal tubercles short, distinctly convex on the inner side. Antennae 

 slender, imbricated, without distinct hairs; the 3rd joint provided with 9-11 small 

 to rather large circular sensoria arranged in a row almost over the whole length; 

 tlie 4th without sensoria; the relative length of Joints about as follows; III-80,. IVf 

 60, V-48, VI-140 (30 + 110;. .. i ...ioi 



Rostrum reaching the middle coxae. Wings very slightly clouded along the 

 veins, with normal venation; veins very stout; hind wings with 2 almost parallel 

 obliques; booklets 2 or 3. Cornicles in shape as in the wingless form, but much 

 shorter, almost 4 times, as long as wide, imbricated, indistinctly reticulated on the 

 distal part, a little longer than the 4th antennal joint, almost twice as long as the 

 Cauda. Cauda smaller than that of the wingless form, tapering, witJi thej.ipei 

 rounded, provided with 2 pairs of long lateral bristles. Legs slender; tibine^pcoi- 

 vided with many moderately long normal setae; hind tarsi shorter than tiic Ixisal 

 part of the last antennal joint. : ■ 



Length of body about 1.9 mm. Antenna about 1.8 mm. 



Fose wing-ahout 2.8 mm. Corniele-about 0.3 mm. r-.- 



Jiost.-Iilnis vermcifera. . , , .'i.i iiiv/olSsii 



Distribution. -Japan: Hakozaki near Fukuoka. =1.; ui,iiC!iU>i*-l .-JiuO'' 



Many viviparous females were collectwl by the author on Juiie .2, 198Sii li.iiv,' 



Myzus sasakii Mats? ' .s i'.Aa si'»f.ioh(iA 



