17,2 Morrison: Philippine Nondiaspine Cocculss 193 
acters of the genus. I have very carefully examined a portion 
of a specimen from the type material, all that has been available, 
and in addition specimens of Platylecanium pseudexpansum 
(Green), and of a third, undescribed species from Singapore, 
with the result that these pores appear to me to be quite cer- 
tainly dorsal, instead of ventral, and the genus description should 
be changed accordingly. These groups of pores also occur in 
at least some species of the genus Paralecanium. 
Platylecanium cribrigerum (Ckll. and Rob.). 
Platylecanium cribrigerum (Ckll. and Rob.), Robinson, Philip. Joum. 
Sci. § D 12 (1917) 12, 13. 
About a fifth of one specimen from the type material has been 
examined through the kindness of Professor Cockerell. 
Genus PARALECANIUM Cockerell 
This genus is composed of medium-sized, flat, oval to circular 
species, which have the marginal hairs modified into broadly 
expanded and flattened flabelke which usually overlap more or 
less. I have been unable certainly to differentiate Paralecanium 
expansum Green and P. cocophyllse Banks, and have therefore 
made use of the comparative characters given by Banks in his 
description in preparing the following key: 
Key to the Philippine species of Paralecanium. 
a 1 . Legs and antennae well developed, the latter 7-segmented. 
P. luzonicum Ckll. 
a 2 . Legs wanting; antennae at most indistinctly 4- or 5-segmented. 
b 1 . Color pale yellow; marginal flabellae broader in proportion to length 
and more narrowed at base; spiracular spines always three in 
each group; male puparium with seventeen plates. 
P. cocophyllae Banks. 
6 2 . Color reddish brown; marginal flabellae more nearly circular or long 
oval, at most very slightly narrowed at base; spiracular spines 
varying from three to nine in each group; male puparium with 
eighteen plates P. expansum quadratum (Green). 
Paralecanium luzonicum Ckll. 
Paralecanium luzonicum Ckll., Robinson, Philip. Journ. Sci. § D 12 
(1917) 12. 
Through the kindness of Professor Cockerell, I have been able 
to examine a portion of the type material. This species does not 
appear to have been collected since the time it was described. 
It is easily separable from the other two known from the Phil- 
