86 E- Takahashi 



Nymph uf viviparous female. 

 The winged viviparous female, like most Apliididae, shows four nymphal 

 instars, but in tlie nymitii of the wingless form only three instars are to Ix; distin- 

 guished, 



(Wiuged form) 

 Key to instars. 

 (1 ) Antennae 4-joiuted (2) 



Antennae 5-jointed , (3) 



( 2 ) The 3rd untennal joint as long as tlie 4th; iiorns on the liead 



Romewiiat pointed at the apex; cornicles absent The 1st instar. 



:- The 3rd antenual joint a little longer than tlie 4th; liorns 



ratlier rounded at the apex; cornicles present Tlie 2ud instar. 



( 3 ) The 3rd antenual joint almost as long as tlie 5th; wing-p;ids 



, not well developed The 3rd instar. 



The 3rd antennal joint longer than the 5ih; wing-pads well- 

 developed The 4th iuwtar. 



(The first instar) Yellowish greeu, with a pair of indistinct longitudinal 

 greenish patches on the dorsum. Aatenriae almost colourless or pale greenish, w'lth 

 the last joint sliglitly dusky. Eyes almost dusky. Legs pale greenish, slightly 

 dusky on the apices. Body wide, rather flat, only slightly dusted with powder. 

 Wax-pores well-develoiicd as in the wingless adult, rather large, somewhat transve- 

 rsely narrowed, distributed as in Oretjma insularis v. d. Goot. Head fused with the 

 prothorax, provided with 2 or 3 wax -pores near the eye, and with a few very long 

 bristles which are shorter than tlie horns on the head. Horns large, with the apex 

 somewhat sharply pointed, gradually expanded toward the base, somewhat curved 

 upwards, almost as long as the basal two antennal joints taken together. Eyes 

 . composed of 3 facets. 



Antennae short, almost as stout as the horn at the base, slightly more slender 

 than the tibia, 4-jointed, jirovided with a few long bristles; the 3rd joint with a 

 . small circular sensorium at the ajiex; the 4th somewhat imbricated, longer than the 

 lasal two joints taken together; the relative length of joints about as follows: 1 + 

 II-I6, ni-21, IV-21. Rostrum stout, reaching a little beyond tlu middle coxae. 

 Thoracic and the basal 8 abdominal segnjents each provided with a group of wax- 

 pOres on the side; each group composed of 4 or 5 wax-;)ores arranged in a single 

 longitudinal row. Abdomen with a few long bristles. Cornicles not visible. 



