60 



Zoologica: N. Y. Zoological Society 



[III; 3 



FIG. 9. PSEVDOCOCCIJS BROMELIAE BOUCHE. 



Sketch of an adult living female with intact covering and 



peripheral pencils of wax. 



secreted an appreciable quantity of wax from their dorsal in- 

 tegument, and lack the peripheral fringe of snow-white pen- 

 cils. I have not seen the males. Young individuals are rather 

 active, not infrequently moving about in the petiole, but the 

 older ones remain stationary in the food grooves till the petiole 

 begins to dry up, when they take to wandering about aimlessly 

 in search of more succulent pastures. 



In specimens of the Pseudococcus treated with caustic potash 

 and stained according to the method recommended by Mac- 

 Gillivray (1921, Chapter II), the details of the integument are 

 clearly visible (Fig. 10). Only a few of the structures are of 

 interest in connection with the following behavioristic account, 

 such as the anus, which is on the ventral surface of the flat- 



