Aphididae of Formosa. — 3. 93 



with a pmall sensorium; the 4th almost as long as the 3rd. Lateral and dorsal tulxsr- 

 cles absent. Wax-pores not developed. Rostrum reaching the hind coxae. 

 Cornicles large, of lachnid- appearance, provided with about 4 very long bristles. 

 Cauda not distinct. Anal plate not bilobed. Legs slender, with a few long bristles; 

 hind tibiae longer than the antenna; tarsi very long, with 2 rather long slightly 

 knobbed hairs on the tip; hind tarsi longer than the 3rd antennal joint, almost as 

 long as the bristle on the body; claws very long. 

 Length of body-about 0.8 mm. 



Full-grown nymph of winged viviparous female. 

 (in the gall). 

 Dark yellowish brown, slightly covered with powder. Body oblong, with a 

 few rather long hairs. Wax-pores not developed. Head not fused with the pro- 

 thorax, with 4 very short setae on the front. Eyes large, with ocular tubercles. 

 Antennae short, stout, somewhat curved, not imbricated, 5-ioiuted, with a few 

 moderately long hairs; the 4th joint almost as long as the basal 2 joiuts taken 

 together, -with a small apical sensorium; the relative length of joints as follows: 

 III-37, lV-17, V-19. Tubercles lacking. Cornicles very sjiort, much wider tlian 

 long, not on cones. Cauda short, broadly rounded, not constricted. Anal plate not 

 bilobed. liCgs moderately long, not stont, with some moderately long hairs; hind 

 tibiae somewhat shorter and more slender than the antennae; tarsi long; hind tarsi 

 longer than the 5tli antennal joint; claws long. 

 Length of body-about 1.65 mm. 



Many wingless viviparous females and nymphs of the winged form were ol)serv- 

 ed in the galls on December 21, 1922, at Toseikaku, Taichyu, Formosa. Many 

 winged adults, which were probably sexuparae, emerged a few days later. The gall is 

 very large and prominent, measuring about 55-80 mm. in diameter, almost globular 

 in appearance, but is composed of numerous pale greenish branches, aud the outer 

 surface is completely covered with a white jiowder, which is probably secreted by 

 the aphids. The aphids are found among the branches in the gall. This aphis is 

 sometimes not rare in some mountainous regions in Formosa. 

 Astegopteryx styracophila Karsch. 

 Aphididae of Formosa-2, p. o4 (1923). 



Full-grown nymph of winged viviparous female, 

 (in the gall). 

 Body oblong, somewhat covered with powder. Wax-pores not developed. 



