186 TVie Philippine Journal of Science 1920 
Genus PROTOPULVINARIA Cockerell 
The single Philippine species of this genus might possibly be 
confused with two species of the genus Coccus in its immature 
stages prior to the formation of the fringe of white secretion 
around the posterior portion of the body, although in reality the 
tremendous length of the anal plates in relation to their width, 
together with the character of the marginal hairs, makes this 
species easily recognizable ; but to prevent confusion, the species 
has been included in the key to the species of the genus Coccus. 
Protopulvinaria longivalvata Green. 
Protopulvinaria longivalvata bakeri Cockerell and Robinson, Bull. 
Am. Mus. Nat. Hist. 33 (1914) 332, fig. 9; Robinson, Philip. Journ. 
Sci. § D 12 (1917) 9. 
A careful comparison of type specimens of Green’s species and 
Cockerell’s subspecies has been possible on account of the re- 
ceipt of such material from both of these men. While there is 
recognizable a tendency toward those differences indicated by 
plates, X 115 ; b, spiracular and marginal spines, X 640 ; c, 
antenna, X 165. 
Cockerell when describing bakeri, I have been unable to conclude 
that the subspecies is based on anything that is not covered by 
individual variation. Both Green and Cockerell state that the 
antennse are 8-segmented, yet a majority of the antennse on the 
specimens available for examination are 7-segmented; with this 
much variation to begin with, any further consideration of the 
relative lengths of antennal segments seems quite futile. In 
addition to the type material of Cockerell’s subspecies, mate- 
rial on Piper betle var., from Paete, Laguna Province, Luzon 
( McGregor ) has been examined. 
