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63
2.—DESCRIPTION OF A NEW COCCID.
By E. Es GREEN; F.E.S.,

Government Entomologist, Ceylon.

On Oryza sativa, Linn., Natural Order Graminew. Rice
or paddy.

Chionaspis decurvata, Green, n. sp., Family Cocctdz, Sub-order
Homoptera, Order Hemiptera. Plate XVII, Fig. 1, pygidium of
female, greatly enlarged.

On leaves of rice plants grown under shelter in the Museum in
July, 1900, a coccid was found, and was sent to Mr. E. Ernest Green,
F.E.S., Government Entomologist , Ceylon, who has furnished us with
the following description of it, as it appeared to him to be a species
new to science.

‘* PUPARIUM OF FEMALE white: pellicles very pale straw-colour: moderately
convex : oblong: broadest across a point a little behi nd the extremity of the second
pellicle: tapering posteriorly. Ventral scale well developed. Long :—1'50 to
175mm. Broad :—o'75 mm.”

“ PUPARIUM OF MALB white, semi-transparent: obscurely tricarinate. Long :—
I'io mm. Broad :—o'40 mm.”’

‘“ ADULT FEMALE yellow: elongate: broadest across the metathorax and the
base of the abdomen. Rudimentary antenna with a single stout curved hair.
Segments of the body not strongly marked. Pygidium with a rounded extremity.
A moderately deep median cleft with a chitinous margin. Median lobes promie
nent, narrow, widely divergent, inner edge strongly convex, outer edge concave,
extremity slightly dilated and curved downwards. First lateral lobes duplex,
prominent ; inner lobule largest, narrowed at base. Second lateral lobes obsolete,
Squames large, spiniform : 1—2 on each of the first, second, and third spaces: one
on the fourth space ; and three onthebase. Two or three similar squames on
the penultimate segment. Dorsal oval pores large and conspicuous ; communi-
cating with short cylindrical ducts. Circumgenital glands in five groups : median
group 7 to 8: upper laterals 11 te 14: lower laterals io to 12 Anal orifice on
a level with the lower lateral gland groups. Long :—o'75 to 115 mm. Broad:—
o'30 too 50mm,

«“ ADULT MALE not observed.” :
“ Allied to Ch. spartine, Comstock, but differs in the form of the median
cobes, and in the proportions of the female puparium.”

Plate XVII Fig. 1 shows the pygidium of an adult female.

A lady-bird beetle (Family Coccineldidz) which has been identified
by Mr. L. O. Howard, Entomologist to the United States Department
of Agriculture, Washington, as Platynaspis villosa of Mulsant, preys
on this coccid both in its larval and imaginal forms. It is figured
on Plate IX, Fig. 3, imago x14.

INDIAN MUSEUM NOTES, VOL-V. N°3. PLATE XVI.
[

E.Ernest Green, del. ; Photogravure. Survey of India Office s,Calcutta February1902