18 SCALE INSECTS OF SANTA CRUZ PENINSULA 



I have specimens from Castilleia sp. near Woodside, grass near Stanford 

 University and Quercus agrifolia near Mountain View that I assign to 

 this species. 



Adult female (Fig. 4A) with the spines of the margins much larger 

 than those of the dorsum, the latter usually quite small. Marginal spines 

 (Fig. 4D) (in specimens from the type material) very stout, conical and 

 rather bluntly pointed, of various sizes, each abdominal segment normally 

 with one or two large spines and two or three smaller spines at each 

 lateral margin. Dorsal spines (Fig. 4>) resembling those of the mar- 

 gins in form or at times slightly curved, rather few in number, those of 

 the abdomen tending to be arranged in four longitudinal rows, those of 

 the cephalothorax more numerous, scattered, in size merging at the mar- 

 gins with the marginal spines. Anal lobes (Fig. 4B) chitinized only along 

 the mesal margin, each with three slender ventral setae and three dorsal 

 spines of which two are longer and more slender than the marginal spines. 

 Anal lobe setae nearly three times as long as the anal ring setae. Anten- 

 nae (Fig. 4C) moderately slender, normally 7-segmented. Legs likewise 

 moderately slender, the claw with a distinct tooth, the posterior coxae 

 with a few pores. Ducts (Fig. 4) with a rather deep and slightly 

 asymmetrical cup. 



Notes : The above description and the accompanying figures are based upon 

 specimens from the .type material, but the species presents a very considerable 

 range of variation. Even in specimens from the type host and the immediate 

 type locality the marginal spines are noticeably longer and more slender than those 

 here figured. 



I have at hand a considerable amount of material from localities without 

 this area which represents either extreme variations of E. baJuae or several very 

 closely related species. In this material are specimens of E. costaricensis Ckll., 

 which differ only in having the spines of the anal lobes slightly smaller than the 

 marginal spines and in having the anal lobes mere heavily chitinized; specimens 

 from Eriogonum sp. in Owens Valley, California, which differ in having the mar- 

 ginal spines stouter than in E. bahiae; specimens from Gutierresia sp. near Mesilla 

 Valley, New Mexico, which differ only in having the marginal spines slightly 

 curved, and specimens from the material recorded by Cockerell as E. palmeri var. 

 a which differ in having the marginal spines larger and slightly differently shaped. 

 Only the examination of a large amount of material from many hosts and localities 

 will permit any definte conclusions as to the proper disposition of these forms. 



Eriococcus paenulatus n. sp. 

 Fig. 5. 



Type host and locality. From Artemisia californica, near Stanford 

 University, California. 



Habit. Occurring on the smaller stems of the host. Sac white, 

 smooth except for a few projecting threads of wax ; length 2.5-3 mm. 



