1048. The American Naturalist. [December, 
Antennz.—These are 10-jointed, as observed in Jamaican 
C. cacti, and C. tomentosus. The two first joints are compara- 
tively short. I noted of C. tomentosus : joint 2 subglobose, 3 
longest, fusiform; 4, 5 and 6 fusiform, equal, distinctly shorter 
than 3; 7 slightly shorter than 6; 7, 8, and 9 subequal; 10 
about as long as 4. Joints with whorls of hairs. Antenne 
dark reddish, but last joint pale pink. The Jamaican C. cacti 
showed Shout the same, but 4 longer than 5. I saw no 
knobbed hairs. 
Signoret says the antennæ of cacti are brown, and in his 
figure the fourth and fifth joints are longer, if anything, than 
the third. 
Legs—I noted of C. tomentosus: claw long and straight; 
digitules very slender, filiform, hardly knobbed. Tarsal 
knobbed hairs well-formed, rather stout. Tibia and tarsus 
with a row of strong short spines on innerside. Tarsus about 
two-thirds length of tibia; tibia a little ae than femur ; 
trochanter with a long hair: 
Scutellum.—The scutellum in Jamaican C. cacti exhibits a 
distinct median longitudinal furrow. 
Conclusions. 
l. Pending the discovery of new facts proving otherwise, I 
would propose to unite the tribes Acanthococcini and Coccini 
under the latter name. 
2. The genus Coccus may be re-defined as consisting of spe- 
cies which have rows of dorsal spines in the larva, truncate 
dermal processes in the adult female, antennz 7- or 5-jointed 
in the 2, 10-jointed in the 2, 5- or 6-jointed in the larva, and 
in the 9 more or less abundant cottony secretion. The ab- - 
sence of bristles on the anogenital ring of the adult 9 may 
also be cited; it was on this ground that Dr. Riley, to whom I 
sent C. loblentemis, objected to its inelusion in x dcantAocquitu, the 
latter genus having the bristles. 
3. The cochineal insect, as - commonly understood, may be 
taken to incl closely allied species , C. tementosus Lam., 
C. cacti Linn., C. confusus ‘Call, separated by the characters 
gm above. Former records of the occurrence of C. cacti 
