p. VAN DER GOOT, NOTES OR ORIENTAL APHIDIDAE. 12$ 



Antennae very short, but for this genus relatively well 

 developed, three-jointed ; relative lenghts of the antennal 

 joints about as: 6,5,31. Third joint with 2 primary sensoriae, 



Fig. 5. Thoracaphis hongkongeiisis n. sp., 



dorsum of apterous female (schematical). 



tho = céphalothorax; si = siphunculi; ap = anal plate. 



the one subapical, the other at a distance of \/,, the length 

 of the joint from the apex. 



Rostrum reaching to the 2"'^ pair of coxae. 



Siphunculi reduced to minute pores. Cauda broad, wartlike, 

 slightly constricted at the base. Anal plate bilobate, the lobes 

 with some fine bristles. Rudimentär}" gonapophyses 2 in 

 number, wide apart, each with a few minute spines. Genital 

 plate with a transverse row of long bristles along its hind- 

 margin. 



Legs moderately short, of the usual Honiiaphidina-{Q>xvci. 



Nymphe. 

 General colour. 



Body bluish black, without waxy secretion ; wingpads 

 greyish-)'ellow. (The young larvae are dull reddish-brown). 



