53 
which rapidly narrows beyond fourth lobe, and ceases before the deep 
notch which indicates another segment. Margin cephalad of fourth 
lobe distinctly serrate, serrations coarse. 
Habitat. — Tokio, Japan. (Takahashi ; Div. Ent. Dept. Agr. No. 5043. ) 
At first sight there appears some resemblance to Aonidia, but that 
genus really represents circular Fiorinia. The present insect, Aspi- 
diotus duplex, has a sort of double scale, for the brown true scale is cov- 
ered by a blackish film of secretion, which often extends a little over 
the exuviae. I can not see the first skin on the orange exuviae, but as 
often happens it is doubtless covered by secretion, and as usual in 
Aspidiotus the orange portion represents both larval skins. If the 
insect were an Aonidia, the blackish film should represent the second 
skin, and this certainly is not the case. 
The almost lateral exuviae and other characters presented by this 
species are very peculiar for Aspidiotus, but a closely allied form has 
been described by Mr. Maskell as Aspidiotus ihece. This latter infested 
tea in the Kangra Valley, India, and Assam, and has just the sublat- 
eral exuviae, lattice work pattern of pygidium, and covering film of our 
insect. It will be distinguished, however, by the scale being light 
brown (ours is very dark), the film being white (not blackish), and sev- 
eral other minor characters. 
In America there is no species very near to duplex, but an apparently 
new si)ecies shortly to be described by Mr. W. G. Johnson, found on 
JEsculus californica at Palo Alto, Oal., shows some superficial resem- 
blance and has a similar covering film, though that is whitish. It 
differs at once from duplex in the position of the e^uvhe, the obliquely 
truncate median lobes, the large conspicuous spines, etc. This species 
of Mr. Johnson's is probably related closely to the European A. hippo- 
castani Sign, (which I have never seen), but I think he is correct in con- 
sidering it distinct. 
Genus CHXONASPIS Sign. 
Chionaspis latus n. sp. 
Female scale. — Similar to that of Chionaspis aspidistra^ but broader. 
Adult female (cleared in potash and mounted in balsam). — Three- 
fourths mm. long, about one-third wide; lateral margins of segments 
somewhat produced, but the breadth of the produced portions greater 
than the length. Anal orifice rather large, round, level with the interval 
between the lateral groups of glands. Five groups of ventral glands, 
median of 8, cephalolaterals 20 to 23, caudolaterals 19 to 22. Length of 
caudolateral group g£o inch ; distance of hindmost gland of caudolateral 
group from base of median lobes T ^o inch; length of median lobes 22-50 
inch. Median lobes brown ; the others colorless, or almost so. Median 
lobes obliquely ascending to the median line, at which they are contig- 
uous for their whole length, the two lobes together forming nearly the 
outline of a half circle. The descending external margins are thrice 
