80 Memorias de la Sociedad Cientifica 



b. Skin with hairs few and 

 minute M. tnexicanorum (Coekerell.) 



GENUS PALAEOCOCCUS, COCKERELL. 



Female half-pea shaped, without an ovisac; male with not 

 more than two fleshy processes. 



A. With three longitudinal series of rather large patches 

 of bright yellow secretion . . Palcsococcus mexicanus (Ckll. 



&. Parrott.) 



B. Without such patches P. rosce (Eiley and Howard.) 



GENUS ICERYA, SIGNORET. 



Female with a large posterior ovisac; male with not more 

 than two fleshy processes. 



A. Ovisac longitudinally ribbed. 



a. Margin of body with very 

 long waxy processes, longer 



than the ovisac Icerya montserrtrtensis (Riley 



& Howard.) 



b. Margin of body without such processes. 



1. Edge of body* with glassy 

 filaments; antennae 11 join- 

 ted /. purchasi, Maskell. 



2. Edge of body without such filaments; antennas 9 to 10 

 jointed. 



i Secretion of female mostly white, but basal part of ovi- 

 sac yellow. 



a Larger, with smaller anten- 

 nas (about 700 f± long) I. littoralis, Coekerell. 



/3 Smaller, with larger anten- 

 nas (about 850 p- long) J. littoralis var tonilensis, 



Coekerell. 



