24 



A CONTRIBUTION TO THE KNOWLEDGE OF 



Morphological characteristics. Length (flattened on slide) 3 mm.; 

 form broadly oval, almost circular. The number of pairs of cerarii is 

 difficult to determine with accuracy, due to the fact that some of them 

 appear to be divided, but it may be taken as seven. Of these, one pair, 



Fig. 7. Lachnodius salicis n. sp. : A, dorsal aspect of portion of tip of abdomen, 

 showing anal ring and cerarii ; B, cerarian spine disproportionately enlarged. 



containing five to seven closely grouped spines, is on the head anterior to 

 the eyes. The remainder are along the posterior portion of the abdomen, 

 the groups being somewhat linear in form. Anal lobe pair with fifteen 

 to twenty spines, penultimate pair with nearly as many, the number in 

 the remaining pairs becoming successively less. In all the spines are 

 short and conical, accompanied by many pores but without auxiliary 

 setae. Dorsal body setae relatively few, short and slender. Tubular 

 ducts very few, small. Anal lobes protruding but little, without chitiniza- 

 tion either dorsally or ventrally. Anal ring at some distance from the 

 margin, of normal size and shape, bearing six to ten setae and surrounded 

 by a group of setae. Antennae eight-segmented. Legs rather stout, the 

 claw without a tooth. 



Notes: This differs from the other species of its group by the reduced 

 number of setae on the anal ring. In other respects, however, all three are very 

 similar. 



Genus PSEUDOCOCCUS Westw. 

 Pseudococcus ephedrae (Coq.). 



Fig. 8. 

 1918. Pseudococcus ephedrae (Coq.) ; Ferris, Cal. Species Mealy Bugs, p. 45. 



Type host and locality. From Ephedra sp., Los Angeles County, 

 Cal. 



