E. ERNEST GREEN, REMARKS ON COCCIDAE. 313 
5. Lecanium opimum, nov. 
(Coll. Jacobson, Nos. 1102, 1180, 1154, 1201, 1281 and 1282). 
Adult female, after gestation, (fig. 8), subcircular, hemi- 
spherical, smooth, margin somewhat broadly flattened. Anal 
cleft confluent, marked only by a slight carina. Colour ochreous 
or fulvous, sometimes olivaceous brown: margin dark brown. 
Much less convex before gestation (fig. 9). Antenna (fig. 10) 
8-jointed, the 4™ joint markedly shorter than the 5 antennal 
formula (1, 3, 8), (2, 5, 6), (4, 7). Limbs well developed: foot 
(fig. 11) with a strong falcate claw: ungual digitules broadly 
dilated, unequal: tarsal digitules hair-like, with a small knob 
at the extremity. Stigmatic cleft (fig. 13) with a dense chitinous 
lunate plate bearing 3 stout spines (scarsely projecting beyond 
the plate) and about 30 translucent pores. Marginal hairs 
(fig. 18) simple, finely pointed. Anal aperture situated at 
about one fifth of the length, from the posterior extremity. 
Valves of anal operculum (fig. 12) triangular, the outer angle 
obtusely rounded: base slightly longer than outer edge. The 
thick derm of the dorsum is crowded with conspicuous 
irregularly oval translucent cells which vary in size, being 
smallest on the median and largest on the marginal area. 
There is a well defined circumscribed patch of smaller and 
more crowded cells on the median line near the anterior margin. 
There are also small clusters of larger translucent cells, in 
irregular longitudinal series. Length 5 to 7 mm, 
On Cassia jistula, L. »Samarang, March 1910«. 
In general appearance, this species resembles an exaggerated 
L. hemisphaericum, Targ. Besides being double the size, it 
differs from that species in having simple (undilated) marginal 
hairs, in the antennal formula, and in the characters of the 
stigmatic clefts. 
The species is attended by ants (Oecophylla smaragdina, F.) 
which construet protecting webs over the assemblage of Coc- 
cidae. In spits of this protection, the insects are parasitized 
