46 THE CALIFORNIA SPECIES OF MEALY BUGS 



Notes : Morphologically this is very close to P. citri, but the curiously flagel- 

 liform spines and hairs, together with the abundance of dorsal body setae, is suffi- 

 cient to separate it at once. It might perhaps be regarded by some as a "variety" 

 of P. citri, but I believe it to be sufficiently distinct. 



Pseudococcus longisetosus n. sp. 



Plate 1, fig. 10. 



In life. Thickly covered with white powdery wax, with short, stout 

 lateral tassels which become somewhat longer posteriorly. Ovisac not 

 observed. 



Morphological characteristics. Antennae either 7- or 8-segmented in 

 the adult female. With from 15 to 17 pairs of cerarii, the normal num- 

 ber, 17, generally being obscured either by the dropping out of one or two 

 pairs or their merging with the body setae. The first three or four cerarii 

 have usually three conical spines and the remainder two, although there 

 is considerable variation, but the normal number for most of the cerarii 

 is two, those of the ultimate pair being somewhat larger than any of the 

 others. All cerarii with prominent auxiliary setae and numerous pores. 

 The anal lobe cerarii have many scattered pores, and several long, stout 

 hairs. Ventral side of the anal lobes with a small and rather irregular 

 chitinized area, bearing two or three slender setae at its posterior margin. 

 Dorsal body setae very numerous and unusually long, especially on the 

 abdomen. Derm thickly beset with triangular pores and small cylindrical 

 ducts without a rim about the mouth. Anal lobe setae about equal to the 

 anal ring setae in length and accompanied by several minor setae of nearly 

 their own length. 



Immature female in general resembling the adult, but somewhat less 

 hairy. 



Male not definitely recognized, due to the association of this with 

 another species, but an apterous male was observed that may perhaps be- 

 long with this. 



Type host and locality. From beneath a stone, associated with 

 ants, (Cremastogaster lineolata) on the mountain road above Woodside, 

 San Mateo County, Calif., April, 1917. 



Hosts and distribution. From the type station and from the under- 

 ground stems of Castilleia foliolosa and Orobanche tuberosa, Coal Mine 

 Ridge, near Stanford University, most abundant upon the latter host, and 

 from roots of Armeria vulgaris on the cliffs at Pacific Grove. 



Notes: In general this species most nearly resembles P. maritimus, differing, 

 however, in the rather striking vestiture of long hairs and in the less marked con- 

 centration of the pores about the conical spines of the anal lobe cerarii. 



