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



Habitat. — Found on grass (Festuca scahrella) on Black 

 Mountain, Santa Clara County, California. The speci- 

 mens were collected by the writer March 24, 1900, — eggs 

 and newly hatched larva at the same time. 



Lecanium adenostomaB, sp. no v. 



Plate XXVI, Figs. 17-26. 



Adult Fetnale. — Shape subhemispherical, with the edges not flattened. 

 Average length, 4 mm., width 3 mm., height, 2 mm. The shape and pro- 

 portions vary somewhat according to the place upon which the scale formed. 

 Color varies from light brown to dark brown, dorsal surface smooth. When 

 removed from the twig there remains a little white cottony substance. 



Antennae rather small, seven-segmented, about .26 mm. long, — formula 

 3, 7, 4, 2 (5, 6) I (sometimes fourth segment longer than the seventh), third 

 segment about .05 mm. in length, seventh with many rather long hairs, the 

 others with but few. Legs small; coxa very stout, with a few long hairs; 

 tibia about .09 mm. long; tarsus (without claw) about .045 mm. long, a few 

 knobbed hairs on the extremity; claw stout and curved. Anal ring with 

 eight long hairs. 



Egg. — Elliptical in form, .3 mm. long and about one-third as wide; color, 

 light reddish brown, with a peculiar curled marking. 



The Newly Hatched Larva. — Body broadly elliptical, .38 mm. long, about 

 .21 mm. wade, rounded in front and narrow behind; color, pale reddish 

 brown, with legs and antennae pale brown. Antennae six-segmented, third 

 segment longest, sixth next to the longest; sixth segment with several long 

 hairs, the others with but few, — formula 3, 6, 2 (i, 4, 5). Eyes prominent, 

 with red pigment. Mouth-parts and legs well developed. The three pairs 

 of legs similar in form; coxa quite long, about one-half as thick as long, with 

 one or two longish hairs; trochanter small and triangular in shape, with a 

 single hair; the femur the longest joint of the leg, and almost equal to the 

 coxa in diameter, with several long hairs; tibia a little shorter than femur, 

 with a few long hairs; tarsus a little shorter than tibia, slightly tapering 

 toward the extremity, which is furnished with a few spiny hairs and four 

 knobbed hairs, or digitules, of which the lower pair are shortest, with a single 

 rather long claw at the end. 



Habitat and Life-History. — Found on Adenostotna fascic- 

 ulatum, in the foot-hills of the Sierra Morena, Stanford 

 University, and on Black Mountain, Santa Clara County, 

 California. Taken by the writer March 24, 1900. 



The female became mature about the latter part of 

 March or the first of April. The eggs were laid irregularly 



