70 THE CALIFORNIA SPECIES OF MEALY BUGS 



mented. But one pair of cerarii present, these on the anal lobes, the 

 cerarian spines elongated and differing only in size from the body setae, 

 accompanied by two or three slender hairs and no grouped pores. Body 

 with relatively few pores and ducts. Dorsum of the abdomen with num- 

 bers of multilocular pores. Very few setae except on the last three or 

 four segments of the abdomen, where there are many slender setae of 

 about equal length on the dorsum and venter. Anal lobe setae slightly 

 shorter than the anal ring setae. Anal ring rather weakly chitinized. 



Type host and locality. Quite abundant at times on the salt marsh 

 grass, Distichlis spicata, at Palo Alto, Calif. 



Hosts and distribution. I have specimens from the type host at Ano 

 Nuevo Point, Santa Cruz County and from La Jolla. In the vicinity of 

 Palo Alto the species becomes mature in August and September. 



Notes : This is distinguished chiefly by the elongated cerarian spines. I 

 have specimens of this from La Jolla collected by Cockerell and determined by 

 him as his Pseudococcus salinus, which they cannot possibly be, according to his 

 original description of that species. 



Trionymus festucae (Kuwana). 

 1902. Ripersia festucae Kuwana, Proc. Cal. Acad. Sci., (3), 3 :401, pi. 25, figs. 11-16. 



In life. Concealed beneath the sheathing bases of the leaves, enclosed 

 in more or less mealy secretion. 



Morphological characteristics. Antennae 7-segmented. Two pairs 

 of cerarii present, these on the last two segments of the abdomen, each 

 containing two small, sharp, conical spines, not accompanied by grouped 

 pores. Scattered about the anal cerarii are a few slender setae which do 

 not appear to be especially connected with them. Dorsum of the abdomen 

 with numerous multilocular pores. Body with short hairs dorsally and 

 ventrally, these somewhat more numerous toward the posterior end, but 

 not so strikingly so as in T. smithii. Setae of the anal ring quite long, 

 slightly longer than those of the anal lobes. Anal ring rather small and 

 heavily chitinized. 



Immature female. The larva has 6-segmented antennae and but one 

 pair of cerarii. 



Type host and locality. From Festuca sp., on Black Mountain near 

 Stanford University. 



Hosts and distribution. I have taken this from Festuca sp., near 

 Woodside, San Mateo County, Calif., and have also found a species on 

 bamboo on the Stanford campus that I am unable to separate from it. 



Authentication. Types examined. 



Notes: I have seen specimens from Missouri that I believe to be identical 

 with this species. 



