172 The Philippine Journal of Science 1920 
Fig. 18. Pseudococcus virgatus (Ckll.), adult female; a, leg, X 115; b, antenna, X 115. 
of Brain® that the variety is not to be considered as distinct 
from typical virgatus seems to be entirely correct. The unre- 
liability of the antennal formula and of the relative lengths of 
antennal segments as a specific characteristic has been proven 
so frequently that it hardly seems worth while to call attention 
to it again. 
Specimens of this species from the following lots of material | 
have been examined: 
LUZON, Manila, on Pithecolobium dulce, Achyrantes aspera, 
Amaranthus spinosus, and Acalypha wilkesiana (coll. Mc- 
Fic. 14. Pseudococcus virgatus (CkIl.), adult female; posterior apex of abdomen, showing 
cerarius, peculiar heavy gland openings, anal ring, ete., X 97. 
*Coccidae of South Africa, Trans. Royal Soc. South Africa 5* (1915) 
133. 
