1893.] Notes on the Cochineal Insect. 1045 
and these differences cannot be held to have generic value. In 
C. confusus and the Jamaican C. cacti, the secretion is profuse, 
so that the individuals are hidden in it, and separated with 
difficulty. In the Madeira C. cacti, it is much more sparse, 
allowing the gray color of the females to be seen. In C. tomen- 
tosus it forms a sac covering the insect, after the manner of 
Eriococcus; in the smaller specimens, part of the body below 
is free, but larger ones are entirely covered by secretion. The 
individuals of C. tomentosus in their woolly saes, are easily sep- 
arable from one another. 
Activity.—Maskell writes for Coccus, “adult female active ;” 
as against the stationary females of Eriococcus, etc. "This sup- 
posed character is valueless ; the final state of female Coccus is 
one of inactivity. 
Antenne.—The antennse are very small, and show plain 
evidence of degeneration. In C. cacti from Jamaica I could 
plainly see the seven joints; the first large, the second broad 
and very short, the third longer but still broader than long, 
the fourth perhaps as long as the third but not so broad, the 
fifth and sixth about as broad as long, and the seventh 
decidedly longer than broad, rounded, emitting two or more 
hairs. All this agrees excellently with Signoret’s cacti. 
C. tomentosus also shows seven joints, practically as in cacti, 
except that the fourth joint is longer in proportion. C. confu- 
sus has the antennz more degenerated, five-jointed, all the 
joints broader than long except the last; third shortest, last 
emitting about seven hairs. 
Legs.—In C. confusus I found all the legs present and well- 
developed, though small. Femur about as long as tarsus and 
tibia; tibia decidedly shorter than tarsus. In C.tomentosus the 
legs are stouter than in confusus, the tibia about as long as the 
tarsus, but if any difference, the tibia is the shorter. Femur 
very stout, and about as long as tarsus and tibia. The tibia is 
broader than the tarsus; the claws large. The usual knobbed 
hairs at end of tarsus are present. 
Truncate Spines.—The skin of all three species shows numer- 
ous truncate processes, which no doubt represent the spines of 
the larva and of the species of Eriococcus. These processes 
