ZooL— Vol. III.] KUWANA—COCCIDM OF JAPAN. 59 



21. Pulvinaria horii, sp. nov. 



Plate X, Figs. 44-52. 



Adult Female. — Found usually in crevices of bark or in any sheltered 

 place on trunk and large limbs, singly and in clusters. Color pale brown. 

 The scale is circular, with many short lines radiating from the margin toward 

 the center; in the center two longitudinal lines are bordered by two trans- 

 verse lines, forming a quadrangle with a much raised longitudinal median 

 line. The scale is not covered with secretion. Ovisac snow white, its base 

 ranging from 4 to 5 mm.; ovisac extending posteriorly and laterally, with 

 many distinct, radiating grooves, as shown in the figure; the posterior end of 

 scale distinctly cleft. When boiled in KOH and spread out under a cover- 

 glass measures about 8 mm.; circular in outline; abdominal cleft deep. 

 Antennae eight-segmented, .41 mm. long; formula 2 (3, 4, 5) 6, 7, 8, i; seg- 

 ment 2 longest; 3, 4, and 5 subequal and next in length; segment i stoutest 

 and shortest; segment 8 with many long hairs; the others with few. Mouth- 

 parts small; rostral loop short. Margin of body with fine simple hairs; each 

 anterior incision has a long spine with a short one on each side. Legs sub- 

 equal; coxa longer than wide, with two or more spines; trochanter the usual 

 shape but small, with one long and a few short hairs; femur, the longest seg- 

 ment of the leg, is as wide as coxa and bears a few spines; tibia slender, 

 almost as long as femur; tarsus less than half the length of tibia, with four 

 digitules and a terminal claw; tarsal digitules fine and knobbed, digitules on 

 claw stout and knobbed; claw large and curved. Triangular plates small but 

 conspicuous, several spiny hairs along posterior portions. Anal ring large, 

 bearing many (eight ?) long hairs. 



Newly Hatched Larva. — Length .66 mm., width .4 mm.; broadly elliptical, 

 front rounded, widest in thoracic regions. Color reddish brown; legs and 

 antennae pale brown. Eyes red and distinct. Margin of body with fine 

 simple hairs, rather far apart; in each anterior incision is a long spine with a 

 short one on each side. Mouth-parts large; rostral loop extending to about 

 the third abdominal segment. Antennae and legs large. Antennae usually 

 seven-segmented, .2 mm. long, hairy. The proportional lengths of antennal 

 segments are variable even in the same specimen, but segment 3 is always 

 the longest. The following formulae show the variations: — 



Three pairs of legs subequal, anterior pair slightly smaller than the posterior 

 pairs; coxa quite large, longer than wide, with a few hairs; trochanter small 

 and triangular, with one long and a few short hairs ; femur the largest segment 

 of leg, and as wide as coxa; tibia shorter than femur, with a few spiny hairs 

 along outer margin; tarsus much shorter than tibia, tapering posteriorly, and 



(2) January 24, 1902. 



