48 THE CALIFORNIA SPECIES OF MEALY BUGS 



Pseudococcus maritimus Ehrhorn. 

 Text figure 11 ; plate 2, fig. 13. 



1900. Dactylopius maritimus Ehrhorn, Can. Ent. 32:315. 



1909. Pseudococcus obscurus Essig, Pomona Col. Jn. Ent. 1 :43. 



1909. Pseudococcus bakeri Essig, Ibid. 2 :334, fig. 



1917. Pseudococcus omniverae Hollinger, Ann. Ent. Soc. Am. 10:271, fig. 31. 



In life. Covered with thick, white, waxy powder, the lateral tassels 

 rather short and slender, equaling perhaps one-fourth the width of the 

 body, the caudal tassels longer, equaling at times half the length of the 

 body. Eggs laid in loose, white, cottony masses. 



Morphological characteristics. With 17 pairs of cerarii of which 

 the first two or three pairs have three or four cerarian spines, the remain- 

 der but two, the spines becoming larger toward the posterior end of the 

 body. All cerarii with auxiliary setae and with numerous pores, the 

 pores in the anal lobe pair being concentrated into a crowded, circular 

 area about the cerarian spines. In some cases the anal lobe cerarii are 

 surrounded by a weakly indicated chitinized area, in others this is entirely 

 lacking. Ventral side of the anal lobes with a well-defined somewhat 

 triangular chitinized area, varying somewhat in size but always present. 

 Dorsal body setae few, slender. Triangular pores more or less numerous, 

 intermingled with a few tubular ducts without a raised rim about the 

 mouth. Anal lobe setae slightly shorter and slenderer than the anal ring 

 setae. 



Immature female differing but little from the adult. 



Type host and locality. From roots of Eriogonum latifolium on the 

 cliffs at Santa Cruz, Calif. 



Hosts and distribution. I have at hand specimens of this species 

 from wild cherry near New York City (R. W. Doane coll.) and from 

 roots of clover at Medford, Ore., (M. N. Reeher coll.). It has been re- 

 corded from Missouri under the name of P. omniverae Hollinger. Within 

 the state of California the list of hosts and localities is limited merely 

 by the collecting that has been done. In the vicinity of Stanford Uni- 

 versity I have taken the species from tomato, roots of carnation, passion 

 flower, Quercus agrifolia, Magnolia, sp., maple, Crataegus and Pinus 

 radiata. In the vicinity of Fresno it is a pest on the grapes, and in the 

 southern part of the state it is a serious enemy of the citrus fruits. It is 

 probable that there is almost no cultivated or wild flowering plant upon 

 which it will not feed. 



Authentication. Specimens compared with type by Mr. Ehrhorn. 



Notes : Specimens taken by me from the type host at Santa Cruz were 

 forwarded to Mr. Ehrhorn, who identified them as his species, P. maritimus. I 



