THE COCCIDAE OF SOUTHWESTERN UNITED STATES 29 



Material examined. The type and specimens from Juniperus pachy- 

 phloea, a few miles west of Datil, N. Mex. 



Habit. Thinly covered with powdery secretion except for two nar- 

 row, longitudinal areas which are bare ; marginal tassels practically lack- 

 ing. Ehrhorn states that the egg-sac is small. 



Morphological characteristics. Length (flattened on slide) 2 mm. 

 Form broadly oval, but tapering at both ends. The spines of the cerarii 

 are extremely small and tend to be widely separated, making it difficult 

 to determine the number of pairs, but there appear to be normally fifteen. 

 In none of the cerarii are there auxiliary setae, nor is there any grouping 

 of the pores about the cerarian spines. Anterior two to three cerarii with 

 four to five spines, remainder with two. No chitinization of the anal 

 lobes, either dorsally or ventrally. Dorsal body setae very few, extremely 

 small, slender. Cylindrical ducts all small, without a raised rim about 

 the mouth, not concentrated at the lateral margins of the abdominal seg- 

 ments. Anal ring setae somewhat longer than the diameter of the ring 

 and nearly equaling the anal lobe setae. Antennae normally eight- 

 segmented. 



Notes: This is very similar to P. sequoiae (Coleman), which is common 

 on Sequoia and various species of Cupressus in California. The chief differences 

 are in the widely separated cerarian spines of juniperi and in the fact that the 

 tubular ducts in this species are not at all concentrated at the lateral margins of 

 the abdominal segments. 



Pseudococcus prosopidis (Ckll.). 

 Fig. 12. 



Type host and locality. From Prosopis sp. at Mesilla Park, N. Mex. 



Material examined. From Prosopis velutina near Tucson and near 

 Benson, Ariz. 



Habit. Dorsum almost entirely bare of secretion, marginal tassels 

 very short, caudal tassels somewhat longer. At maturity a somewhat 

 pad-like ovisac is formed. 



Fig. 12. Pseudococcus prosopidis Ckll. : anal lobes, left half dorsal, right half 



ventral. 



