400 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



Legs, comparatively small; coxa very stout, very much wider than long; 

 trochanter of the usual triangular shape; femur very much narrower than the 

 coxa and longer than tarsus; tibia about two-thirds as long as the tarsus; 

 claw stout and curved; both tarsus and claw with long filiform digitules. 

 Dorsal surface with prominent capitate spines; ventral, with spiny hairs. 

 Anal ring large, with six long hairs; posterior extremity with a single long 

 bristle on each side of the anal ring. 



Adult Male. — Wing expanse about 2 mm.; length of body 1.2 mm.; color 

 reddish purple; antennae and legs yellowish brown, eyes dark purple, wings 

 slightly dusky. Body long and slender. Head rather small, wider than 

 long. Three pairs of eyes, one pair on each dorsal and ventral surface, the 

 third pair, which are small and transparent, on the side. Antennae nine- 

 segmented, each segment with many spiny hairs; first and second segments 

 stoutest, third longest, the rest subequal, ninth segment with six long 

 knobbed hairs. Prothorax very small, mesothorax largest, metathorax as 

 wide as mesothorax but very much shorter. Legs slender and more or less 

 hairy; only two tarsal digitules are to be seen. (If there are any on the claw 

 they could not be found.) On each side of eighth abdominal segment are 

 three long hairs supporting a long white waxy filament. 



Larva. — A full grown male larva taken out from the cocoon is elliptical in 

 form, and slightly reddish black in color; antennae and legs, yellowish brown, 

 about 2 mm. long and i mm. wide. Antennae six-segmented, stout, each 

 segment with a few spiny hairs; sixth segment longest, third next to the 

 longest, — formula 6, 3, 2, i (4, 5). Legs stout; tarsus and tibia almost equal 

 in length. No capitate hairs on dorsal aspect. 



Egg. — Broadly elliptical, .38 mm. long, .3 mm. wide, purple in color, and 

 smooth. 



Habitat. — Found on sage-brush (^Artemisia sp.), in the 

 foot-hills of the Sierra Morena, Stanford University. Col- 

 lected by the author March 24, 1900. 



Cocoons of male and female sacs are found at the base 

 on the trunks of the shrubs, where they are covered by 

 decaying leaves or sheltered by other substances. The 

 specimens first collected were all males, but several weeks 

 later the female sacs were also found. The adult males 

 came out about the middle of April, in the laboratory; they 

 were badly infested by the larvae of a species of ladybird. 

 While trying to rear adult males and eggs from male cocoons 

 and egg-sacs, my specimens were all devoured by these 

 coccinellid larvae. 



