8o CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



Genus Mytilaspis Sign. 

 68. Mytilaspis pomorum Bouche. 



Mytilaspis pomorum Bouche. Comstock, Ent. Rept. U. S. Dept. Agric, 

 1880, p. 325. 



This species was found by the author on apple, Mes-pilus, 

 cuneata, and currant in Sapporo, on willow in Aomori, on 

 apple in Sendai and Morioko, on orchid in Yokohama, and 

 on Ilex crenata (Inu-tsuge) in Hikosan. There is consider- 

 able variation in color, those on Mesfilus cuneata (Sanzashi) 

 being light brown, those on currant dark brown, and those 

 on apple grayish. This insect though not recorded has 

 been known in Japan for some time. 



69. Mytilaspis pomorum Bouche japonica, var. nov. 



Scale of Female. — Dark with yellowish brown exuviae. 



Female. — Yellowish in color; posterior region of the body very much wider 

 than the thoracic region. Anterior group of spinnerets consists of four to 

 eight, anterior laterals, eleven to sixteen, and posterior laterals, seven to 

 twelve. The lobes are of the same shape as those of the typical M. pomorum 

 but much smaller. The notches on the lobes are not quite so distinct as in 

 the type. 



This species was found by the author on Abies firma 

 (Inu-kaya) in Hikosan, Kiushiu. 



70. Mytilaspis euryae, sp. nov. 



Plate XIII, Figs. 85-89. 



Scale of Female. — Length 3-4 mm.; long, narrow, widened posteriorly, 

 straight, sometimes curved; color dark brown. First skin pale brown, 

 showing segmentation distinctly, second skin more or less covered by the 

 secretion. 



Female. — Length 1.35 mm., width .6 mm.; color pale brown, posterior 

 region yellow. The last abdominal segment presents the following 

 characters: — 



There are five groups of spinnerets. The anterior group consists of four 

 to five, anterior lateral, seven to nine, and posterior lateral, seven to eight. 

 Lobes small; median lobes rounded, usually notched on the lateral margin 

 near tip; second pair flat, each lobe being divided into nearly equal lobules, 

 the larger of which is mesad. Plates simple, spiny and tapering; two 

 between meso and second lobes, three outside of the second lobes. Spines 



