d4 
This is very much like A. seutiformis in the characters of the female, 
but the scale is quite different. 
Ceroplastes mexicanus n. sp. 
Female-—Waxy scale, 6 mm. long, 5 broad, 35 high. Wax moder- 
ately thin, grayish white with an ochreous 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 of 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 
femur. 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 distinetly separate from the stalks. Antenne of 
the usual lecaniine type, joints very obscure, but there appear to be 
certainly seven; 4 longest, a little longer than 3; 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 4. 
Habitat.—San Luis Potosi and Guaymas, Mexico; on Catalpa sp., 
October 12, 1894. (Townsend No. 20= Div. Ent. Dept. Agr. No. 6434.) 
In shape and size near to C. cirripediformis Comst., but at once 
separated by superficial appearance alone. It is superficially rather 
like C. irregularis Ckll., but that species is really quite distinet and 
does not show separate plates. 
Coccus cacti L. subsp. confusus Ckll. 
Habitat—Near Arroyo, Tex., December 10, 1894, on Opuntia. 
(Townsend; Div. Ent. Dept. Agr. No. 5859.) 
In the “ American Naturalist” for December, 1893, [ published an 
article on the different species of Coccus. Since then two important 
facts have developed, viz: (1) The antenn of C. confusus are normally 
7-jointed, as in the other species; (2) the Jamaican insect 1s not typical 
C. cacti. The races of Coccus now known to me are four in number. It 
seems preferable to regard them as subspecies of C. cacti rather than as 
distinct species. 
(1) ©. cacti Linn.—This I have 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. I 
was surprised to find that the derm of these was very distinctly reticulate, the reticu- 
lations sinall and equally broad in any direction. The groups of gland orifices were 
brown, and therefore very conspicuous; the number of orifices in a group variable, 
4 ~ / 
