6o CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Skr. 



furnished with spiny hairs on outer margin; four digitules and a large curved 

 claw at posterior extremity; tarsal digitules fine and knobbed. Caudal end 

 of the body deeply cleft; triangular plates very large, with a long hair and a 

 few fine spines at their posterior margins. Anal ring prominent, with six 

 long hairs. 



This species was found by the author on the trunks of 

 Acer trijidu7n (To-kaede), yEsculus turhinata (Tochino-ki), 

 and Kceh-euteria faniculata (Mokugenji), in the grounds of 

 the Nishigahara Agricultural Experiment Station, Tokyo; it 

 is named in honor of S. Hori, Entomologist of the Station. 



Type in the Entomological Collection of Leland Stan- 

 ford Jr. University, and co-types in the author's collection. 



22. Pulvinaria oyamae, sp. nov. 



Plate XI, Figs. 53-56. 



Adtdt Female.— K cottony mass suboval in form, there being at the nar- 

 rower end a dark brown scale sometimes flattened, and sometimes bent 

 upward at about its middle to nearly a right angle; oval, slightly broader 

 behind, where it is notched and apparendy cleft for a short distance in the 

 middle. Dorsum with five or six transverse wrinkles or folds, and many 

 raised lines running outwardly on each side to the posterior margin. Length 

 of sac 6 mm., width about 4 to 5 mm., snow white, no distinct groove; scale 

 dark brown. 



When boiled in KOH and spread out under cover-glass, measures about 5 

 to 7 mm. in length and 4 to 5 mm. in width. Mouth-parts well chitinized but 

 small; rostral loop short. Antennae usually 8-segmented, terminal segment 

 bearing many long hairs, the others a few; relative lengths of antennal seg- 

 ments are variable, but segment 3 is longest, as may be seen in the following 



formulae: — 



3, 5, 2, 4, I (6, 7, 8). 



(3, 2, 4) 5. 6, 8, 7, I. 



(3, 4) 2, 5 (6, 7, 8) I. 

 Legs subequal; coxa stout, longer than wide, with a few long spiny hairs; 

 trochanter as usual, with one long hair; femur stout, with a few scattered 

 hairs; tibia shorter and smaller than femur, with several long hairs on the 

 inner margin and weak hairs on the outer margin; tarsus one-half as long as 

 tibia, with spiny hairs; tarsal digitules long, fine, and knobbed, digitules of 

 claw very stout, gradually widening to large knobs; claw large and curved. 

 Margin of body with spiny hairs, in each anterior incision is one large spine 

 with a short one on each side. Anal plates as usual, posterior extremity 

 rounded, with a few long hairs. Anal ring with eight prominent hairs. 



This species was collected by K. Oyama, in Nagano-ken. 

 The host is unknown. 



