86 REPORT UPON A COLLECTION OF 



with numerous trilocular pores and small tubular ducts and with many 

 multilocular pores on the posterior portion of the abdomen. Anal ring 

 setae about two-thirds as long as the anal lobe setae. Antennae 9-seg- 

 mented. 



Notes : This species is one of a group, including such forms as P. colemani 

 and P. ceralliae, which are extremely difficult to separate. It differs from any 

 similar form that I have seen in the presence of the median groups of spines on 

 the dorsum of the abdomen. 



Phenacoccus sp. 



A species very closely resembling the preceding, but differing in not 

 possessing the dorsal group of spines, was taken from a species of Phyl- 

 lanthus at La Laguna. I am not disposed to give it a name. 



Genus PUTO Sign. 

 Puto yuccae (Coq.). 



1918. Puto yuccae (Coq.), Ferris: "California Species of Mealy Bugs," Stanford 

 University Publications, p. 64. 



Previous records. A widely distributed species on many hosts 

 throughout southwestern and western United States. 



Lower California records. From Atriplex sp. at La Paz, and Antigo- 

 num ("flor de San Miguel") at San Antonio. 



Genus ERIUM Ckll. 



Erium lichtensioides (Ckll.). 



1918. Erium lichtensioides (Ckll.), Ferris: "California Species of Mealy Bugs," 

 Stanford University Publications, p. 75, pi. 3, fig. 25. 



Previous records. Occurring throughout western United States on 

 species of Artemisia. 



Lower California records. From Artemisia californica at Ensenada. 



Genus TACHARDIA. 

 Tachardia sp. 



A species of this genus was found in some abundance on Acacia 

 ftexicaulis ("palo de fierro") at La Paz, San Pedro, and San Bartolo. The 

 North American species of this group are all structurally almost identical, 

 differing only in the form and color of the secretions, and until a careful 

 review of all our species has been made attempts at identification are not 

 likely to be very successful. 



