THE COCCIDAE OF CALIFORNIA. 15 



knobs. Front part of head black, eyes very prominent, strongly faceted, 

 black. Legs and antennae black and very hairy. Ventral surface of 

 abdomen dark brown, segmentation distinct. Mesosternum black, a 

 small black line on poststernum, and an irregular black patch on meta- 

 sternum. Abdominal brushes with long stout glassy bristles about 6 mm- 

 long. Style short, stout, and conical. Antennae 10-jointed, very hairy, 

 reaching beyond end of abdomen. Joint 2 shortest, joints 3 and 10 a 

 little longer, and the other joints subequal. Each joint with numerous 

 hairs. Wings large, about 3 mm. long and 1 mm. broad, expanse about 

 7 mm.; smoky, slightly pubescent, with a costal space blackish brown? 

 halteres resembling small wings with several hooks. Legs long, stout, 

 and very hairy. Femur much shorter than tibia. Tibia about four 

 times as long as tarsus. Digitules fine hairs. Claw long, slender, and 

 well curved. Digitules short clubbed-shaped hairs. 

 On Quercus chrysolepis. 



This wonderful insect is of little economic importance and requires 

 close inspection to detect its presence. A long white, thread-like pro- 

 tuberance is first noticeable coming out of the cracks of the bark on 

 the oak while the female is buried underneath. 



Subfamily ORTHEZIIN^E. 

 Orthezia insignis Dougl. 



(Colored Plate II.) 



Adult Female. Body broad oval; width, 1.2 mm.; length, 1.5 mm., 

 exclusive of lamellae; ochreous, mottled to dark green; distinctly seg- 

 mented. Arranged around the body, beginning with the second tho- 

 racic segment, are white, waxy plates or lamellae. In the adult female 

 the lamellae are united posteriorly, forming a long, parallel-sided mar- 

 supium, which contains the eggs and young. The arrangement of the 

 lamellae can be better shown by a figure (See colored Plate II) than 

 by a description. Antennae 8-jointed, all fulvous except the black, 

 somewhat fusoid eighth joint; the first joint is very stout, the second 

 the stoutest and shorter than the remaining ones. Legs light brown, 

 the darker tarsi bearing numerous fine spines. 



Adult Male. The slender, dusky body is about 1 mm. in length, and 

 bears two large ovate, transparent wings with two veins united at the 

 base. Wing expanse, 2.5 mm. The last segment bears on each side 

 a long, white filament. 



This insect is strictly a greenhouse species, and sometimes is very 

 destructive to coleus, verbena, and chrysanthemum. 



