SOME COCCIDA FOUND BY MR. ALEX. CRAW IN THE COURSE OF 
HIS QUARANTINE WORK AT SAN FRANCISCO. 
By T. D. A. COCKERELL, Las Cruces, N. Mex. 
Chionaspis difficilis n. sp. 
Female scale—About 2 mm. long, irregular, from round to subelon- 
gate, slightly woolly in texture, white, moderately convex; exuvize to 
one side, rather inconspicuous, second skin black or nearly so; first 
skin pale straw color, about one-third on second, but on the side toward 
the middle of the scales sometimes the exuvie are reddish. Iemoved 
from the twig the scale leaves a very conspicuous snow-white patch. 
Male scale-—White, tricarinate, exuvi almost colorless. 
Adult female.—Plump, orange rufous with a slight purple tinge; in 
caustic soda bluish green, with the pygidial parts dull orange. Five 
groups of ventral glands, caudolaterals of about 43, cephalolaterais 
about 41 to 43, median about 37. Median lobes brownish, large, close 
together at their base, diverging at nearly a right angle; the two sides 
of the lobe, if produced to a point, would meet at nearly a right angle. 
These lobes are perfectly entire, or at most very slightly notched on 
each side. Next each median lobe is a spine-like plate, not so long as 
the lobe; then the small, low, deeply bifid or bipartite second lobe, 
adjacent to which is a spine; then two or three spine-like plates, longer 
than the lobes; then the third lobe, low and bifid like the second, its 
caudal half larger than the other; then three spine-like plates, resem- 
bling the other three; then a rather long interval, on which are three 
small, low, pyramidal projections, the third with a spine next toit; then 
four spine-like plates; then a long unbroken or slightly serrate interval ; 
then four or five pairs of large spine like plates. The anal orifice is a 
long way from the hind extremity. There are conspicuous rows of oval 
pores marking the obsolete segments. 
Habitat—Japan, on bark of branches of Blaagnus, found by Mr. 
Craw in his quarantine work, November 13, 1895. 
This is one of those puzzling forms which might as well be placed in 
_Diaspis as Chionaspis. The female presents the closest resemblance to 
D. amygdali Tryon, but the median lobes are practically entire and the 
glands in the groups appear to be more numerous. The last feature, 
however, varies in amygdali, and doubtless will in dificilis. The female 
scale differs at once from amygdali in the color of the exuvie, and the 
male scale is quite distinct, being weli tricarinate. Chionaspis major 
Ckll. has the tricarinate male scale, but dificilis differs from that in its 
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