50 THE CALIFORNIA SPECIES OF MEALY BUGS 



Immature female differing from the adult chiefly in the fact that the 

 cerarian spines are closer together. 



Type host and locality. From Nipa fruticans, Demerara, British 

 Guiana. 



Hosts and distribution. This is a common greenhouse species occur- 

 ring on palms. It is not known to occur out of doors in this state. 



Authentication. Not authenticated. It is the species that commonly 

 passes as P. nipae and P. pseudonipae. It agrees fairly well with the 

 original description and very well with the descriptions of P. nipae given 

 by Marchal and Green. 



Notes: I can see no basis for the separation of P. nipae (Maskell) and P. 

 pseudonipae (Ckll.). Specimens from Hawaii which pass there as P. nipae are 

 certainly not different from those which pass here for P. pseudonipae. 



Pseudococcus quercicolus n. sp. 

 Plate 2, fig. 18. 



1910. Pseudococcus agrifoliae Essig, Pomona Col. Jn. Ent. 2:147-148, figs. 60B, 



60C (Not of Essig, Ibid. 1:42.) 



1911. Pseudococcus agrifoliae Essig; Smith, Ann. Ent. Soc. Am. 4:316. 



1913. Pseudococcus agrifoliae Essig; Smith, Pomona Col. Jn. Ent. & Zool. 5:78. 



In life. With rather long marginal tassels and a caudal pair of at 

 least half the length of the body. Ovisac not observed. 



Morphological characteristics. With 17 pairs of cerarii of which the 

 anterior 3-4 pairs have 3-4 cerarian spines and the remainder but 2, those 

 of the anal lobe pair much larger than any of the others. Lateral cerarii 

 each with a small cluster of pores and with three or four auxiliary setae. 

 Anal lobe cerarii surrounded by a distinct chitinized area, which does not 

 extend back to the base of the anal lobe hair and which contains numerous 

 scattered pores. Ventral side of the anal lobes without a chitinized area. 

 Dorsal body setae, few, slender. Anal lobe setae about equaling anal ring 

 setae. 



Immature female in general closely resembling the adult. 



Type host and locality. From Quercus chrysolepis, Stevens Creek, 

 Santa Clara County, Calif. 



Hosts and distribution. From the type host and from Pasania densi- 

 flora in the vicinity of Stanford University and from Quercus agrifolia 

 near Claremont, Los Angeles County, Calif. There appears to be but 

 one generation a year, this maturing in May or June in the vicinity of 

 Stanford. 



Notes: The problem of the. proper name for this species presents a curious 

 tangle. I have at hand the type slides of Pseudococcus agrifoliae Essig. The slide 

 labeled "Type" contains mature females of the species herein described as P. quer- 



