Aphididae of Formosa.— 3. , 9^ 



tlie lasal 2 joints cacli proviilcd witli a moderately long b.air; tlie ?ril and 4tli 

 jirovided with minute spinulee; the 3rd with a ratlier short hair near the tip, the 

 sensoriura eireular and rather small; the 4th with a few hairs; the relative length 

 of joints as follows: III-15, IV-16. Rostrum slender, reaching beyond the hind 

 coxae. Abdomen provided with al)out 7 pairs of minute setae on tlie middle of 

 the dorsum, without tubercles. Cornicles almost reduced to }x)res, larger than 

 the facet, Cauda very sliort, broadly rounded, not constricted, provided with 

 a pair of long bristles. Anal plate not liilobed. Legs stout, stouter than the 

 antenna, provided with some very long bristles ou the distal halves of tibiae, 

 and the tarsi; tarsi provided with 2 very long knobbed hairs; hind tarsi almost 

 as long as the 3rd antcnnal joint. 

 Length of body-about 0..5 mm. 



The fully-grown nymph is provided with 4-jointed antennae and wax-pores 

 arranged in a single row around the whole margin of the body, as in the first instar. 



Some wingless viviparous females with the antennae 5-jointed were collected 

 ou B/mncn cliinensis on February 16, 1923, near Taihoku. 



Many wingless viviparous females were observed on July 15, 1923, near 

 Taihoku. Some wingless ones were collected on November 26, 1923, at Kusukusu, 

 Koshun, Formosa. 



Nurudea shiraii Mats. 



Aphididae of Formosa-!, p. 95 (1921). 



Numerous wingless viviparous females and their young were observed in a 

 gall ou lihus scmialaia on September 8, 1923, at Taihoku. 



The winged adults appeared in the same gall two weeks later. The wingless 

 viviparous female is very small and distinctly convex on the dorsal surface, with 

 the eyes composed of 3 facets and the antennae very short, being 4-jointcd. The 

 mesonotum of the winged form is provided with a pair of wax-plates which were 

 erroneously described as being lacking in the previous paper. 



Eriosoma clematicola "• s^p. 



(PI. X, A, fig. 6) 



AVinged viviparous female. 



Almost black, with the abdomen slightly greenish. Head, eyes and antennae 



black. Frontal tubercles lacking. Eyes large, with very small ocular tubercles. 



Ocelli rutlicr large. Antennae very long, 6 jointed, without hairs; the 3rd joint 



somewiiat stouter than tlie 4tli, provided vvitli about 40-45 very narrow annular 



seusoria which almost completely encircle the segment and are regularly distributed 



