50 
with an excessively long one; 3 a little longer than 6, and longest; 1 
about as long as 6, or a little shorter: 4 and 5 subequal; 2 shortest. 
Formula 3, 6, 1, 5, 4, 2. 
Habitat. — Tokio, Japan, on bamboo. (Takahashi; Div. Ent. Dept. 
Agr. Xo. 6308.) Judging from the twigs sent, the bamboo must be one 
of the smaller ornamental species. 
When I saw this, I thought at once of the Sandwich Island Sphcero- 
coccus bambuscB Mask. I have specimens of this latter, kindly sent me 
by Mr. Maskell. and it is evidently distinct, though similar in geueral 
appearance. The adult female of bambusce is distinctly segmented pos- 
teriorly, and so hardly resembles a Lecanium, except in the texture of 
the skin. The larva? of the two species are also easily distinguished. 
The various species which Maskell has described under JSphwrococcus 
are strikingly diverse in their characters, and this species may be 
placed therefor the present without widening very much, if at all, the 
bounds already set by the author of the genus. 
Genus LECANIODIASPIS. 
Subgenus PROSOPOPHORA Douglas. 
Never having seen the type of Lecaniodiaspis (L, sardoa), I had taken 
it for granted that Douglas was correct in separating Prosopophora as 
a distinct genus. Recently, finding that Lecaniodiaspis yuccw was 
undoubtedly a Prosopophora, I was led to look more closely into the 
matter, with the result that I can not separate Douglas's genus satisfac- 
torily from Targioni Tozzetti's. In leaving Prosopophora as a subgenus, 
I believe I give it the best rank it is entitled to, and even that may be 
called into dispute. 
With the Japanese species described below, the genus contains the 
following: 
(1) Lecaniodiaspis sardoa Targ., Mediterranean region. 
(2) L. yucca' Towns., New Mexico. 
(3) L. yuccas var. rufescens (Ckll.), New Mexico and Colorado. 
The true yucca' is rounder in outline than rufescens and has 7-jointed antennae, 
whereas rufescens shows distinctly 8 joints. The number of antennal joints is 
known not to be constant in L. dendrobii, and I do not think the difference observed 
between yucca and rufescens indicates more than a variety. The former was first 
published and so must stand for the species. It was credited to Riley MS., but the 
only description which has appeared was written by Professor Townsend. 
The var. rufescens occurs on chenopodiaceous plants. The Colorado habitat is now 
first made known; it was sent by Professor Gillette thickly infesting twigs of Sarco- 
batus vcnniculatus from Grand Junction, Colo. Some of the specimens in this lot 
were parasitized. 
4. L. dendrobii (Dough), Demerara. 
5. L. quercus n. sp., Japan. 
6. L. eucalypti (Mask.), Australia. 
7. L. acacia: (Mask.), Australia. 
