ANTONINA SOCIALTS. 209 



ing a remarkable resemblance to a grain of wheat. 

 Colour dirty white, pale to dull ochreous, or brownish ; 

 abdominal extremity red-brown." 



The comparatively long antennae are characteristic 

 of this species, but the members of the genus appear 

 to be very closely allied. 



EXPLANATION OF THE PLATES. 



PL XXXVI, figs. 1 a, 1). Insects natural size beneath the 

 leaf-sheaths of Arundinaria japonica, in company 

 with Aclerda japonica. 



Fig. 2. Adult female (ventral) after treatment with 

 potash. X 10. 



Fig. 3. Antennae of adult female. X 250. 



Fig. 4. One of the four spiracles of the adult female. 



X 600. 



PI. XXXVII, fig. 1. Anal orifice with six long hairs 

 lying within the "trough-shaped cavity at the 

 posterior extremity of the body." X 600. 



GENUS APTEROCOCCUS * (Newstead). 



Adult female stationary, living within the ovisac. 

 Legs persistent. Antennae of six joints. Anal lobes 

 rudimentary. Anal orifice with six hairs. Mentum 

 monomer ous. 



Male apterous. Antennae of seven joints. 



Male puparium felted. 



Larvae resembling the female ; dorsum with rows of 

 truncate spines. 



The distinguishing characters of this monotypic 

 genus are the monomerous mentum of the female, the 

 spiny dorsum of the larva, and the extremely aberrant 

 form of the male (PL LXXII, fig. 6). Apterous males 



* See Appendix. 

 VOL. II. 14 



