42 THE CALIFORNIA SPECIES OF MEALY BUGS 



Pseudococcus crawii (Coq.). 

 Plate 1, fig. 1. 



1889. Dactyl o plus crawii Coquillet, West. Amer. Scientist. 6:123. (As to the 



female.) 



1900. Dactylopius quercus Ehrhorn, Can. Ent. 32:220. 



1914. Pseudococcus crawii (Coq.) ; Essig, Mon. Bull. Calif. State Com. Hort. 

 3:117, fig. 32. 



In life. "The bodies of the females are light yellow and covered with 

 thick plates of white cottony material which entirely hides the color. The 

 lateral filaments are very distinct, being about one-fourth as long as the 

 width of the body. The anal filaments vary from one-third to one-half 

 the length of the body. They usually form a sharp angle at the posterior 

 end and in some individuals the ends are curved inwardly." (Essig.) 

 The females are viviparous, the young being placed in a pad-like ovisac. 



Morphological characteristics. Seventeen pairs of cerarii present, all 

 with more than two conical spines, the anal lobe pair containing 15 to 20, 

 the others from 3 to 6. The lateral cerarii are without auxiliary setae 

 and are accompanied by a small cluster of pores. The anal lobe pair are 

 borne upon a large, nearly circular and somewhat protuberant chitinized 

 area, the spines being accompanied by numerous scattered pores and 

 several slender setae. In some cases the penultimate cerarii are also sur- 

 rounded by a more or less distinct area. Ventral side of the anal lobes 

 without chitinized area. Dorsal body setae very few, scattered and small. 

 Numerous triangular pores scattered over the body, mingled with rela- 

 tively few, large, cylindrical ducts. Anal lobe setae equaling anal ring 

 setae. 



Immature female differing but little from the adult. 



Type host and locality. From Ramona polystachya (white sage) 

 near Los Angeles, Calif. 



Hosts and distribution. Common on the white sage throughout the 

 southern part of the state, and according to Essig, occurring on the Cali- 

 fornia sage (Artemisia calif ornica) also. Also from Quercus chrysolepis 

 and Pasania densiflora in the vicinity of Stanford University, and from 

 Adenostoma fasciculatum in Marin County. 



Authentication. Not authenticated. Specimens from the type host 

 and location agree with the original description and belong to what is 

 commonly accepted as this species. 



Notes : Specimens of two species of Pseudococcus taken by me from Quercus 

 chrysolepis near Stanford University were sent to Mr. Ehrhorn who identified one 

 of them as his Pseudococcus quercus. I can find no basis for separating this from 

 P. crawii in spite of the. apparent anomaly presented by the wide difference in 

 hosts. It is perhaps the most distinctive species occurring in the state and cannot 

 be confused with any other. 



