280 THE CANADIAN ENTOMOLOGIST. 



pore, and between the second and third lobes two spines, one above and 

 one below, followed first by one or two plates, and then by a conical 

 projection bearing a marginal pore. Outside of the third lobe are a spine 

 and from one to three plates, then a slight notch, immediately followed by 

 a marginal pore and after a space two unequal spines and about three 

 plates. Following these plates are a notch and a marginal pore, then 

 after a space a group of about five plates. 



Spinnerets arranged in five groups : median, 8-14 ; anterior laterals, 

 19-28 ; posterior laterals, 19-33. 



Scale of male. — The male scales are much more numerous than 

 those of the female. They are white, delicate in texture, about 1.2 mm. 

 in length, the larval skin at the anterior end being colourless or slightly 

 yellowish. The scale itself may be parallel sided or slightly broadened 

 posteriorly, and is indistinctly carinated. 



Male. — Male insect unknown. 



On Aucuba from Japan. Discovered by Mr. Craw in the course of 

 his quarantine work at San Francisco. The scales are grouped together 

 on one side of the leaf beneath, and the edge of the leaf is folded under, 

 almost completely hiding them from view. 



Chionaspis wista?-ice, n. sp. 



Scale 0/ female. — The female scale is about 2 mm. in length, though 

 some specimens are slightly longer, moderately broadened, dirty white in 

 colour and delicate in texture, being a close imitation of the epidermis of 

 the bark on which it rests. The scales usually occur in the longitudinal 

 cracks of the bark, and are partially concealed under the epidermis. 

 They are very often pressed out of the normal form. The exuviae are 

 brownish, and the second skin is covered with secretion. 



Female. — The following description of the female was made from 

 dead and shriveled insects. The median pair of lobes is large and 

 conspicuous, the second pair considerably smaller, and the third pair 

 obsolete. The median lobes are darker in colour than any other part of 

 the pygidium, firmly joined at the base, their inner edges parallel and 

 nearly touching each other for about half their length, then diverging at 

 about a right angle, with the exposed edges serrate. The second lobe is 

 composed of two lobules, the inner one being ihe larger. Within the 

 outer edge of each of the median lobes is a spine, and next to this a 

 short blunt plate, followed by a marginal pore. Between the lobules of 

 the second lobe is a spine, and outside of the second lobe are a plate and 



