34 
This is very much like A* scuUformis in the characters of the female, 
but the scale is quite different. ' 
Ceroplaste3 mexicanus n. sp. 
Female. — Waxy scale, 6 mm. long, 5 broad, 3^ high. Wax moder- 
ately thin, grayish white with an ochreons tinge, smooth, without 
noticeable ridges or grooves. The wax is clearly separated into plates, 
though one has to look closely to see the sutures, which are concolor 
ous with the rest oi* the wax. Plate nuclei small, dull, dark purplish, 
with the usual central spot of white secretion. Dorsum of denuded 
insect simply convex, caudal spine rudimentary. Derm yellowish 
brown, with round gland spots encircled by a suffused irregular ring of 
dark brown. Legs ordinary. Coxa with a pair of moderately long- 
bristles at its end. Trochanter with a very long hair — as long as the 
lemur. Femur only about as long as tibia. Tibia about one-third 
longer than tarsus. Tarsal digitules fairly long and stout, with large 
suboval knobs. Claw short, curved; digitules of claw stout, with 
large round knobs distinctly separate from the stalks. Antenna 1 of 
the usual lecaniine type, joints very obscure, but (here appear to be 
certainly seven; 1 longest, a little longer than 3j 2 and 1 subequal; 
the last three shortest and subequal; formula 4, 3 (1, 2) (5, 6, 7); 4 with 
a very long hair and two short ones at its end; last joint with several 
hairs, but none nearly so long as that on 1. 
Habitat. — San Luis PotOSl and Cuayinas, Mexico: on Catalpa sp., 
October 1L>, \S\U. (Townscnd ffo.20= Div. Bnt. Dept. Agr. No. 6434.) 
In shape and size near to C, cirripedi/armis Oomst., but at once 
separated by superficial appearance alone. It is superficially rather 
like C. irregularis Ckll., bul Unit species is really quite distinct and 
does not show separate plates. £ 
Coccus cacti L. subsp. confusus Ckll. 
Habitat. — Near Arroyo, Tex., December 10, 18 ( .)4, on Opuntia. 
(Townsend: Div. Ent. Dept. Agr. No. 5859.) 
In the "American Naturalist w for December, 1893, I published an 
article on the different species of Covens. Since then two important 
facts have developed, viz: (1) The antenna- of C. confusus are normally 
7-jointed, as in the other species; (2) the Jamaican insect is not typical 
G. cacti. The races of Coccus now known to me are four in number. It 
seems preferable to regard them as subspecies of ( '. cacti rather than as 
distinct species. 
(1) ('. cacti Linn. — This I Lave seen alive only in Madeira. The females are com- 
paratively large and sparsely covered with mealy secretion. Those I have studied 
had been purchased for the use of the chemical department of the New Mexico Col- 
lege. They are sold whole and ground down in a mortar to provide the pigment. 1 
was surprised to find that the derm of these was very distinctly reticulate, the reticu- 
lations small and equally broad in any direction. The groups of gland on flees were 
hrown, and therefore very conspicuous: the number of orifices in a group variable. 
