•)() ti. Takahaslii. 



which are of medium or somewhat Large si/.e. not distinctly protuberant anil 

 scattered over the whole length ; the 4tli faintly imbricated, furnished with about 

 16-20 similar sensoria : the 5th imbricated, with 0-3 similar sensoria, the serisorium 

 at the apex small: the basal part of the 6th a little longer than the 1st; the 

 relative longth of joints about as follows: III-110, IV-85, V-65, VI-180 

 (25 + 155). Rostrum reaching a little beyond the hind coxae* 



Thorax and abdomen not reticulated, with a few very short slightly knobbed 

 seate on the dorsum; hairs on the hind part of the abdomen longer. The 1st 

 oblique on the front wing almost straight: the 2nd very slightly or scarcely 

 curved; the 3rd twice forked, the upper branch extending to the apex of the 

 wing, stigmatic vein somewhat strongly curved : hind wings with '2 almost parallel 

 obliques ; hooklets 3. 



Cornicles cylindrical, slightly narrowed toward the tip, not dilated at the 

 base, not curved, faintly imbricated, reticulated on the apical portion, almost as 

 long as the 4th antenna! joint, about 3 times as long as the Cauda, about .").'> 

 times as long as wide. 



Cauda when seen from above, tapering, about 1.3 times as long as wide, 

 somewhat narrowed on the distal halt', stouter than the cornicle, almost as long 

 as the basal part of the 6th antennal joint, furnished with 2 pairs of long lateral 

 bristles. Legs very long ami slender: tibiae almost as stout as the 4th antennal 

 joint, provided with many moderately long setae; tarsi short, not imbricated. 

 hind tarsi a little shorter than the basal part of the 6th antennal joint. 



Length of body — about 1.75 mm. Antenna — about 2.4 mm. 



Fore wing — about 2.5 mm. Cornicle— about <>.4 mm - 



Host — Dryopteris arida. 



Distribution — Formosa: Taihoku; Sumatra: Rotterdam. 



Many winged and apterous viviparous females were collected by Dr. Fulmek 

 in March 1924 in Sumatra. Hitherto unrecorded from Sumatra. The above 

 description was made from the specimens from Sumatra. In Formosa this aphis 

 is very tare, the winged form having never been discovered. 



Myzus wood ward iae Takah. (Aphididae of Formosa, part 1. p. 20 and 

 part 2, pp. 28 and 82) differs from .1/. polypodicola Takah. in the following 

 characters : 



(1) Body much larger, provided with much longer capitate hairs. 



(2) Frontal tubercles more developed. 



