THE CANADIAN ENTOMOLOGIST. 313 



7 mm., smoky, slightly pubescent, with the 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 club-shaped hairs. 



Hab. — I found this remarkable insect in May, 1899, on Qtiercus 

 chrysolepis in Stevens Creek Canon, near Mountain View, Cal., and 

 patiently collected the different stages during the year. 



Pheiiacoccus arteinisue^ n. sp. (Plate 7, fig. 3.) 



Adult 9 elongate oval, about 3 mm. long and i^ mm. broad, of a 

 sage-green colour. 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 colour of body. Segmentation distinct. When placed in boiling 

 K. H. O., body turns orange colour, and leaves derm colourless after 

 boiling. Antennae 9-jointed. Joint 2 always longest, joints 5, 6, 7, 8 

 subequal. Formula: 23914(5678). Joints i, 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 c? . — 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; lo-jointed. Joint 3 

 longest, joint i shortest and stoutest, joints 7, 8 and 10 subequal, joints 

 2 and 9 subequal. Formula: 3.4 5.6.(7.8. io)(2. 9)1. Legs very hairy, 

 long and slender. Tibia much longer than femur. Tarsus very short, 

 less than Vi of tibia. Claw long and very slender. Digitules fine hairs. 



Hab. — On Artemisia Californica. Stevens Creek Canon, near 

 Mountain View, Cal. August 22, 1899. 

 Phenacoccus siachyos, n. sp. (Plate 7, fig. 4.) 



Adult ? about 2^ mm. long and i mm. broad, convex, tapering 

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

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

 dots. Segmentation distinct. There are two longitudinal rows of light 

 brown dots on the meson. The dorsum and margin are thickly set with 

 long fine iridescent spines, which are deciduous. Legs and antennas light 

 brown, quite hairy. Caudal filaments short and stout. When placed in 



