On Coccide of the Genus Ripersia. 51 
Yrias brunca. 
Head and abdomen brown, mottled with reddish-brown 
scales; dorsal tufts on abdomen black. ‘Thorax brown 
shaded with violaceous. Primaries brown; a darker space 
at base; costal and subcostal veins streaked with black; the 
costal space mottled with red; an oblique median geminate 
darker line; the outer line fine, dentate, dark reddish brown ; 
the reniform finely outlined with dark reddish brown; a sub- 
terminal reddish-brown shade, the most distinct of the 
markings ; a fine terminal line and reddish-brown marginal 
spots. Secondaries with a reddish-brown discal spot; the 
subterminal as on primaries. Underneath dark silky grey, 
the fringe greenish yellow. 
Expanse 38 millim. 
Hab. Demerara. 
[To be continued. ] 
X.—The New Memico Coccide of the Genus Ripersia. 
By T. D. A. CocKERELL. 
In the course of an investigation of the insects found in ants’ 
nests my wife and I have met with a surprisingly large 
number of Coccide, almost all associated with Lasius. The 
ants’ nests are under rocks, and the coccids feed upon the 
roots and underground stems of plants, mostly grasses. Some 
of the coccids appear to be only accidentally associated with 
the ants, as it were; but others, especially those of the genus 
Ripersia, are carefully collected and cared for, and removed 
to places of safety by the worker ants when the nests are 
disturbed. 
These myrmecophilous Coccide are hardly to be found in 
the southern parts of the country, owing to the rarity or 
absence of Lasius. Professor W. M. Wheeler writes me that 
he has never met with any species of Las¢us in Texas. 
Ripersia aurantia, sp. ns 
9 .—* Bright orange, with very little mealy powder ; very 
convex, almost hemispherical. Long. 2 millim., lat. 14” 
(W. P. C.). Legs and antenne reddish brown. Antenne 
6-jointed, fifth joint cup-shaped ; joints measuring as follows 
in w* :—(1) 33, (2) 39, (3) 48, (4) 18, (5) 30, (6) 80. 
* All measurements of antennz and legs in this paper are in p. 
% 
