56 THE CALIFORNIA SPECIES OF MEALY BUGS 



KEY TO SPECIES OCCURRING IN CALIFORNIA 



1. With numerous very large tubular ducts, the mouths 



of which are borne at the apices of prominent, 



conical projections stachyos Ehrh. 



Without such ducts 2 



2. Ducts very short and stout kuwanae, Colem. 



Ducts not so 3 



3. Anal lobe cerarii with as many as 8-10 cerarian 



spines eriogoni n. sp. 



Anal lobe cerarii with at the most 3-4 cerarian spines .... 4 



4. Anal lobes prominent, with the cerarian spines borne 



at their tip artemisiae Ehrh. 



Anal lobe cerarii with at the most 3-4 cerarian spines .... 4 

 borne on the dorsum 5 



5. Antennae of the adult female 9-segmented .... 



. . . . colemani Ehrh. 



Antennae of the adult female 8-segmented . solani n. sp. 



Phenacoccus artemisiae Ehrh. 



Plate 2, fig. 15. 

 1900. Phenacoccus artemisiae Ehrhorn, Can. Ent. 32:313. 



In life. Very slightly dusted over with waxy powder, without notice- 

 able lateral or caudal tassels. Oviparous, the ovisac firm, quite long and 

 slender. On the leaves and small twigs of the host. 



Morphological characteristics. First three or four pairs of cerarii 

 with three to four spines, the remainder with but two, all without aux- 

 iliary setae. In all, the spines are quite small and are associated with 

 but two or three grouped pores, the cerarii being so obscure that they 

 are difficult to trace along the lateral margins in the mature insect. Con- 

 ical spines of the anal lobe cerarii borne at the tip of the prominent, teat- 

 like anal lobes, associated with no auxiliary setae and with no especially 

 grouped pores and with but the slightest indication of chitinization. 

 Dorsal body setae extremely minute and very few in number. Triangular 

 pores scattered sparingly over the body, mingled with a few tubular ducts 

 without a raised rim about the mouth. Anal lobe setae perhaps slightly 

 shorter than the anal ring setae. 



Immature female very much resembling the mature female except 

 that the cerarii of the anterior half of the body are borne at the tips of 

 prominent tubercles. 



Type host and locality. From Artemisia calif ornica, Stevens Creek, 

 Santa Clara County, Calif. 



