THE COCCIDAE OF SOUTHWESTERN UNITED STATES 



27 



chitinization of the anal lobes either dorsally or ventrally. Dorsal body 

 setae few, small, slender. Tubular ducts very abundant, practically all 

 with a raised rim about the mouth, those of the cephalic region conspicu- 

 ously larger than the others. Anal ring setae about one and a half times 

 as long as the diameter of the ring and about equal to the anal lobe setae. 

 Anal lobe setae each accompanied by one or two smaller setae. Anten- 

 nae seven to eight-segmented. 



Notes: Morphologically this species is extremely close to P. eriogoni 

 (Ehrh.), to which it will run in my key to the California species of this genus. 

 The latter species, however, is not known to form a long ovisac and the two are 

 possibly distinct. Assuming this to be the case the only definite character that I 

 can find to separate the two is found in the fact that the tubular ducts of 

 gutierresiae are much larger in the cephalic region than elsewhere, which appears 

 not to be the case in eriogoni. Also, it appears that a much larger proportion of 

 the ducts have a raised rim about the mouth in gutierresiae than in eriogoni, 

 which is possibly correlated with the extreme development of the ovisac. 



The description given here is based upon the specimens from Utah. The 

 determination is based upon general resemblance and community of hosts. 



Pseudococcus irishi (Ckll.). 

 Fig. 10. 



1900. Dactylopius irishi Ckll., Can. Ent., 32:129. 



1902. Erium irishi (Ckll.); Ckll., Ann. Mag. Nat. Hist., (7)~ 10:466. 



1903. Erium irishi (Ckll.) ; Fernald, Catalogue Coccidae, p. 113. 



Type host and locality. From Covillea glutinosa, on the butte at 

 Tempe, Ariz. 



Material examined. From Covillea glutinosa, on the butte at Tempe 

 and at Tucson, Ariz., and at Gruendyke's Well, between Mecca and 

 Blythe, Cal. 



Fig. 10. Pseudococcus irishi (Ckll.): A, left half of cephalic region; B, anal 

 lobe and penultimate cerarii. 



