28 A CONTRIBUTION TO THE KNOWLEDGE OF 



Habit. Before reaching maturity the insect bears short, slender 

 marginal tassels; at maturity a rather broad, closely felted white ovisac 

 4 to 5 mm. long is formed, the insect lying at one end of this and nearly 

 enveloped by it. The specimens found at Tempe, Ariz., however, were 

 all concealed in the interstices of a leafy gall which occurs quite frequently 

 on Covillea, and the ovisac was not apparent. 



Morphological characteristics. Length (flattened on slide) 2.5 mm. 

 Adult female with sixteen pairs of cerarii, these for the most part with 

 but two spines, the first three to four pairs, however, having three to four 

 spines, all without auxiliary setae and with a very small cluster of pores. 

 Cerarian spines conical, stout, those of the anal lobe pair largest, the 

 others but little smaller. Anal lobes without chitinization either dorsally 

 or ventrally. Dorsal body setae all small, slender, few. Tubular ducts 

 abundant, all of the same size and apparently all with a raised rim about 

 the mouth. Anal ring setae scarcely longer than the diameter of the 

 ring (which is rather small and relatively simple) and about half as long 

 as the anal lobe setae. Antennae normally eight-segmented. 



Notes: In my key to the California species of this genus this runs to P. 

 sequoiae (Coleman). It differs from this species in having all the cerarian spines 

 quite large and stout and accompanied by a small but definite group of pores, and 

 in having tubular ducts with a raised rim about the mouth. It is very close to a 

 species that I take to be P. steelii (Ckll.) ; the differences between these two will 

 be discussed in connection with the latter species. 



This is certainly not congeneric with Erium globosum, being in all respects 

 inseparable from Pseudococcus. 



Pseudococcus juniper! Ehrh. 

 Fig. 11. 



Type host and locality. Recorded as from Juniperus virginiana, 

 Ashforks, Ariz. This species of Juniperus does not occur in Arizona, 

 the species that previously passed under that name now being known as 

 /. scopulorum. 



Fig. 11. Pseudococcus juniperi Ehrh.: anal lobe and penultimate cerarii. 



