THE COCCIDAE OF SOUTHWESTERN UNITED STATES 



spines of various lengths. Margin of the marsupial opening with nu- 

 merous pores mingled with a few short spines. 



Immature stages lacking the marsupium. Penultimate stage with 

 numerous clusters of short, stout spines on the dorsum. First stage of 

 larva (Fig. 2) of the type found in Icerya. 



Fig. 2. Paleococcus morrilli Ckll. : first stage larva. 



