Aphididao of Formusa. — I. *^ 



Meinoir-i lad. Mus., vi, p. '11'^ (l^l*'^); Swain, California Univ. Pul>. 

 tech. Bull. Coll. Agr. Agr. Expt. St. III. i. p. 130 (11)10). 



Hyalopierus arundinis, Koch, l>iu FHniiz. p. 21. f. 27-28(1857); 

 Buckton, Mon. Br. Aphid, ii. p. 111. pi. LXXV. tigs. 4-5 (1877); 

 Oestland, Geol. Nat. Hist. Survey, Minnesota, j.. 48(1887). 



Host. — Prunus sp; Phragmites sp. 



Distribution. — Formosa; Japan. 



Java (v. d. (i.): India (1 )a<): Atricn (Tiieohald); Europe; 

 North Ameiica. 



Hitherto unrecorded from Formosa. 



The species, in the temperate country, feeds on Phragmites sp. and 

 Prunus sp. during the summer ami is found only on Prunus sp). during 

 the winter, hut in Formosa the aphis is found on Phragmites sp. and 

 Pruiiux S2'>. through the year, without producing sexual lorr 



rms 



Key to Formosan species of Toxoptera 

 (1) Winged viviparous females with S — 'J sensoria <in the ord antennal 



joint T. h'onurii n. sp. 



Winged viviparous females with -i-(i sensoria on tlie 3rd antennal 

 joint T. aurantii {Boy cr.) 



To.ioptera leonurii n. sp. 



Wingless viviparous female 



Dark green. Head, eyes, cornicles and anal plate black. 

 Antennae pale brown, with the distal half black. Cauda blackish green. 

 Legs pale brown; apices of femora dusky; apices of tibiae, and tarsi- 

 black. 



Body oval, without hairs, very slightly pulverulent. Frontal 

 tubercles very short. Antennae imbricated, without hairs; the 3rd 

 joint lacking sensoria; the relative length of joints as follows: III — ^27, 

 IV— -20. V— 10, VI — 37 (10 + 27). Rostrum reaching beyond the 

 middle coxae. Piothorax and the 1st and 7th abdominal segments 



