THE COCCIDAE OP CALIFORNIA. 21 



texture. Oval, about half again as long as broad, dark purple, turning 

 bright crimson when placed in KHO. Body about 1^ mm. long. An- 

 tennae light brown, 7-jointed; formula, approximately: (3 4 7) (1 2) 5 6; 

 joint 3 equal to 5 and 6. Most of the joints with hairs; joint 7 with 

 several comparatively long hairs. Legs light brown, large and stout; 

 each joint with one or more bristles; femur quite swollen; tarsus a 

 trifle longer than tibia. Claw stout and curved. Both tarsus and claw 

 with long filiform digitules. Posterior tubercles short and rounded, 

 Avith one very long, stout bristle and two shorter ones on their outer 

 margin. Anal ring large, with eight long bristles. Derm colorless, 

 with quantities of small spines and rounded glands distributed all over 

 the dorsum. 



Sac of male smaller and narrower than that of the female, color more 

 creamy. 



On Adenoslovia fasciculatuin. 



Phenacoccus artemisiae Ehrh. 



Adult Female. — Elongate oval, about 3 mm. long and 1^ mm. broad, 

 of a sage-green color; measuring with egg sac 4^ mm. Sac loosely 

 woven without any grooves, eggs lemon-yellow. Legs and antennae 

 light brown. Body thinly covered with secretion, but not enough to 

 hide color of body. Segmentation distinct. When placed in boiling 

 KHO, body turns orange color, and leaves derm colorless after boiling. 

 Antennae 9-jointed; joint 2 always longest, joints 5, 6, 7, 8 subequal. 

 Formula: 239 14(5 6 7 8). Joints 1,7, 8, and 9 with several stout hairs. 

 Legs short and stout; femur about as long as tibia; tibia twice as long 

 as tarsus. Claw stout and long, with tooth. Digitules fine knobbed 

 hairs. 



Adult Male. — Abdomen yellowish green, thorax and head dark green. 

 Thorax marked with black longitudinal lines. Body slightly pruinose. 

 Antennae and legs light brown. Eyes dark red. Wings more or less 

 pruinose, very delicate. Antennae very hairy, 10-jointed; joint 3 long- 

 est, joint 1 shortest and stoutest, joints 7, 8, and 10 subequal, joints 2 

 and 9 subequal. Formula: 3 4 5 6 (7 8 10) (2 9) 1. Legs very hairy, 

 long and slender; tibia much longer than femur; tarsus very short, 

 less than one third of tibia. Claw long and very slender. Digitules 

 fine hairs. 



On Artemisia califurnica. 



Phenacoccus stachyos Ehrh. 



Adult Female. — About 2i mm. long and 1 mm. broad, convex, taper- 

 ing posteriorly, viviparous, of a sage-green color. Slightly covered with 

 white secretion, which, when seen through lens, appears as minute white 



