56 



1900. 

 1903. 



A CONTRIBUTION TO THE KNOWLEDGE OF 



Pseudodiaspis parkinsoniae (Ckll.). 

 Fig. 30. 



Xerophilaspis parkinsoniae Ckll., Ariz. Exper. Station, Bull., 32 :282. 

 Xerophilaspis parkinsoniae Ckll.; Ckll., Can. Ent., 32:131. 

 Targionia parkinsoniae (Ckll.) ; Fernald, Catalogue Coccidae, p. 298. 



Type host and locality. From Cercidium (= Parkinsonia) torrey- 

 ana, Phoenix, Ariz. 



Material examined. Specimens from the type material and from 

 the type host at Tempe, Ariz.; from Acacia paucispina near Tucson, 

 Ariz. ; from a narrow-leaved Yucca near Vail, Ariz. 



Fig. 30. Pseudodiaspis parkinsoniae (Ckll.) : pygidium. 



Scale. Scale of the female circular, rather flat, with the exuviae sub- 

 central. Color white. First exuvium naked, second exuvium covered 

 with secretion. Ventral scale very thin. In specimens from Cercidium 

 the second exuvium is deep black and heavily chitinized, in those from 

 the other hosts it is of a lighter color. Scale of the male resembling that 

 of the female in texture, oval, slightly elongate, with the exuvium near 

 one end. 



