45 
rapidly sloping, the outward slope longer than the inner, and diverging 
from it at an angle of about 80°. Next to the outer side of each median 
lobe is a small spine-like plate, then a sac-like incision, then the small 
second lobe, shaped much like the last joint of a finger and in bulk 
hardly one-tenth of a median lobe. Following this is a small sac-like 
incision, then a pointed projection, then two saccular incisions, then 
after a short interval a spine-like plate, then another sac-like incision, 
then a long interval of smooth margin, then another sac, then another 
interval, in the middle of which is a small spine. Below the sac-like 
incisions are transversely elongate pores. 
Habitat. — Japan. Found by Mr. Craw in the course of his quaran- 
tine work, on leaves of an Elceagmts from Japan. I do not know the 
species of Elwagnus, but the leaves are about 3 inches long and If 
inches broad. The scale is extremely inconspicuous, as it lives beneath 
the epidermis on the underside of the leaf along the midrib. By this 
habit and the large median lobes it will be readily distinguished. 
From M. grandilobis Mask., which has the large median lobes, it is 
known by the entirely different color of the scale, etc. Several of 
the specimens were parasitised. 
Mytilaspis carinatus n. sp. 
Female scale. — 3 J mm. long; second skin about 1 mm., first skin about 
one half mm., about one-half on first. Width of scale three-fourths mm. 
Scale very pale brown, strongly keeled, almost exactly straight, narrow, 
not shining; exuviae dull orange. Male scale similar but smaller, with 
only one pellicle. 
Adult male. — Ordinary, well winged. 
Adult female (in caustic soda). — Of the ordinary shape, pale yellow. 
Groups of ventral glands nearly obsolete, but in one example the ceph- 
alolateral group, of 4 orifices, is distinct; and the caudolateral, also 
of 4, is imperfectly devel- 
oped. There are rows of 
well-marked elongate pores 
marking the obsolete seg- 
ments. Anal orifice a long 
distance from hind end. 
Three pairs of lobes, all very 
small, narrow, and incon- 
spicuous, the median larg- 
est, shaped something like 
a blunt canine tooth, widely 
Separated, With a pair Of Fig. 3.— Mytilaspis carinatm (from drawing by Cockerell). 
spine-like plates between. 
Outside each median lobe is a long spine-like plate, much longer than the 
lobe, then a short one, then a slight projection; then the third and sec- 
ond lobes, close together but not touching, of about the same size, and 
