Aphididae of Formosa. — 3. 117 



of very small, circular wax-pores; the number of these wax-pores: front group-:? or 



4; hind group-5 7. Pronotum with a pair of grouj)fl of wax-pores whicli are 



rather irregular in shape, not distiuet, and numbering about 22 in eaeh group, on the 

 dorsum between the lateral wax-})ores. Each thoracic and the first 7 abdominal 

 segments, on the sides, with a group of wax-jxires which are large and circular; the 



numbf^r of these wax-pores in a group being as follows: pronotum-7 8, meso- 



notum-8, metanotum-6 7; the 1st abdominal segment -4 (5, the 2nd alKl.-6, the 



3rd abd.-6 9, the 4th abd.-7 9, the 5th abd.-5 6, the 6th abd.-7 8, the 7th 



abd.-ll 12; the 8th abdominal segment with 15 16 wax-pores in a group at 



the middle of the dorsum. 



Length of body-ab<nit 1.7 mm. Antenna-about. 0.25 mm. 



Hotit.-Bambtuia s-p., attacking the leaf. 



Distribution.-Japan : Oita-prefecture (Hayamiguu); Tokyo. 



Some wingless viviparous females were collected by ]\Ir. K. Uye on Jan. 1, 

 1923. 



Many wingless viviparous females and their nymphs were collected by the 

 author in June, 1923, at Tokyo. 



In the specimens from Toky" the hornlets on the head are almost sis long as 

 the 2nd antennal joint, and the antennae are somewhat longer and sometimes S-joi- 

 nted, though the 3rd and 4th joints are not well defined with the relative length of 

 joints about as follows: III-33, IV-25. 



This aphis is very inactive and groups very densely like most otiicr S2)ccies of 

 the genus Orcf/ma. 



Astegopteryx distyfoliae Takah. 



Nipjxmnphiti dinliifoUiu', Takaliashi, Bull. Brooklyn Entom. Soc, xv, 4, p. 

 115 and Dobutsugaku Zasshi, xxxii, p. 195 (1920). 



Asteffoptoyx didyfolkw, Takaliashi, Aphididae of Formosa-2, p. 148 (1923). 



NijyponapluH dixlylit, Essig and Kuwana (in part), Proc. Calif. Acad. S(!., 

 viii, 3, p. 109 (1918). 



Winged viviparous temale 

 (Second generation) 



Head, eyes, antennae, mesothorax and legs almost black. Abdomen brownish 

 yellow. Wings pale dusky, veins pale gray to pale brownish. Body oblong. Head 

 small, with a few very short hairs. Eyes large, with the ocular tubercles very small. 

 Frontal tubercles lacking. Antennae short, stout, 5-jointed; the lat and 2ud joints 



