30 A CONTRIBUTION TO THE KNOWLEDGE OF 



Morphological characteristics. With about ten recognizable pairs 

 of cerarii, the number varying somewhat, due to the fact that the spines 

 of the cerarii along the anterior portion of the abdomen and in the tho- 

 racic region are so small and tend to be so widely separated that their 

 identity is obscured. There appear to be no cerarii on the head anterior 

 to the ocular pair. Ocular pair with three to four spines, the remainder 

 with but two, all rather small, those of the anal lobe cerarii largest. Anal 

 lobe cerarii with three to four slender setae and a few scattered pores, 

 remainder without auxiliary setae and without grouped pores. No chit- 

 inization of the dorsal side of the anal lobes, but the ventral side with a 

 narrow, chitinized bar extending in from the base of one of the two minor 

 setae. Dorsal body setae few, all small and slender. Tubular ducts con- 

 fined to the ventral side of the body, many with a raised rim about the 

 mouth. Anal lobe setae about one and a half times as long as the diam- 

 eter of the anal ring and somewhat shorter than the anal lobe setae. 

 Antennae normally eight-segmented. 



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

 eriogoni (Ehrh.), from which it differs most constantly in the absence of tubular 

 ducts on the dorsum. From other species of the same group it differs in the 

 presence of a chitinized bar on the ventral side of the anal lobes. 



This determination is based upon general resemblance and community of 

 host. 



Pseudococcus lycii n. sp. 



Type host and locality. From Lycium sp., Cottonwood, Ariz. 



Habit. The specimens at hand are not in such condition as to per- 

 mit a description of the species in life. Judging from its morphology the 

 tassels are quite distinct, but short and slender, the caudal pair not longer 

 than the others. 



Morphological characteristics. Length (flattened on slide) 3.5 mm. 

 Form broadly oval or nearly circular. Fifteen or sixteen pairs of cerarii 

 present, each (including the anal lobe pair) with but two spines, a small 

 but distinct cluster of pores and no auxiliary setae. Cerarian spines 

 all of practically the same size, rather large, stout, conical, with the tip 

 slightly flagellate. No chitinization of the anal lobes, either dorsally or 

 ventrally. Dorsal body setae few, small, lanceolate. Tubular ducts con- 

 fined to the venter, numerous, small and with a raised rim about the 

 mouth, except for a single duct on each anal lobe and a few on the ven- 

 tral side of the thorax which are much larger than the others and which 

 do not have a rim about the mouth. Antennae very variable, six to eight 

 segmented. Claw with a distinct tooth. Anal ring setae about twice as 

 long as the diameter of the ring and much longer than the anal lobe 

 setae. Anal lobe setae accompanied by a single minor seta. 



Notes: This is a rather peculiar species. The toothed claw is in general 

 characteristic of the genus Phenacoccus, yet the species presents none of the other 



