SYSTEMATIC TREATMENT 73 



Hosts and distribution. Known only from the above host. In the 

 Essig collection from Claremont and Berkeley; in the Stanford collection 

 from Mountain View, Santa Clara County, (Ehrhorn coll. and det.). 



Authentication. Topotype and metatype specimens examined. 



Notes : This is the species first described by Essig as Pseudococcus agrifoliae. 

 For a discussion of the nomenclatorial problem involved see the notes under 

 Pseudococcus quercicolus. 



Genus RIPERSIELLA Tinsley. 



Pseudococcine forms with the antennae set very close together at the 

 front of the head, 5- or 6-segmented. 



Type of the genus Ripersia rumicis Maskell. 



Of this genus but one species is found in California. The material 

 of this species examined by me is not of such a character as to permit 

 any further explanation of the genus. 



Ripersiella kelloggi Ehrh. & Ckll. 



Plate 3, fig. 29. 

 1901. Ripersiella kelloggi Ehrh. & Ckll., Proc. Biol. Soc. Wash. 14:166. 



In life. "Adult female generally attached to the roots of grass, pro- 

 ducing a small quantity of white, cottony secretion which generally en- 

 cases the body. Color creamy white, about 1% mm. long and 1 mm. 

 wide, oval, sometimes pyriform, shiny." (Ehrhorn.) 



Morphological characteristics. Antennae very small and short, set 

 little more than the width of the basal segment apart, 5-segmented, the 

 fifth segment nearly as long as the other four together. Legs very small 

 and stout. Anal ring small, with short hairs. 



Type host and locality. From roots of "bunch grass," Stevens 

 Creek, Santa Clara County, Calif. 



Hosts and distribution. Known only as above. 



Authentication. Cotype slide examined. 



Notes : I have not been able to find this species and know it only from a co- 

 type slide sent me by Mr. Ehrhorn. Unfortunately a close study of the species is 

 not possible without more material and I can say nothing in regard to the finer 

 details of its morphology. Whether or not it is really congeneric with the type 

 of this genus and with the other species included with it remains to be demon- 

 strated. 



Genus CRYPTORIPERSIA Ckll. 



1899. Ripersia (Cryptoripersia) Cockerell, Can. Ent. 31:5. 

 1899. Cryptoripersia Ckll., Ibid. 31:278. 



In defining Cryptoripersia as a subgenus of Ripersia Cockerell states 



