J 8 R- Takahashi. 



Jfyzus polygoniformosanus n. sp. (PL. Xl\', 1, Figs. 1-3). 

 Wingless viviparous female. 



Yellowish bruwn. Y^ye?, red. Antennae pale hrowii. apex of 

 the 5th joint, and the 6th black. Cornicles yellowish brown. Cauda 

 yellow. Legs pale brown; apices of tibiae, and tarsi black. 



Body broad, with a few very small capitate hairs. lieatl with 

 some capitate and normal liairs. Frontal tubercles large, with a 

 small blunt tubercle on the inner side. The 1st antennal joint much 

 longer than the frontal tubercle, with a few short capitate hairs and 

 a small l)lunt tul)ercle on the inner side; the 3rd joint iml>ricated, 

 nearly without hairs, lacking sensoria; the 5th joint with a small 

 apical sensoria; the relative length of joints as follows: III-53, 

 IV-33, V-30. VI-89 (15 + 74). Eyes small. Rostrum reaching 

 beyond the middle coxae. 



Abdomen with a small lateral tubercle on the 7th segment. 

 Cornicles reac ling beyond the caudal apes, dilated at the base, 

 slightly swollen near the apex, with many long, prominent capitate 

 hairs mostly on the basal half. Cau(hi large, much longer than wide, 

 somewhat constricted at the base, gradually narrowed towards the 

 apex where it is rounded, with 5 pairs of long lateral bristles. Anal 

 plate with many long normal bristles. Legs long and slender, witii 

 many normal and capitate hairs. 



Length of body — l.S mm. Antenna — 1.5 mm. 



Cornicle — 0.4 nnn. 



Host. — Polygonum perfolialus ; Lonicera japonica. 



Distribution. — Formosa (Taihoku, Kagi). 

 Collected by Mr. E. Kurosawa. 



Tiie species described above is distinct from all the species of 

 Myzus known to ine by the prominent capitate hairs on the 

 cornicles. 



