32 
Closely allied to J., obscurus Comst., but differs in color of exuviae, 
shape of female, and number of orifices in grouped glands. 
Note — Diagnostic descriptions of these species have been given under the title 
"Preliminary Diagnoses of New Cocciday" and published in Supplement to 1'syche, 
February, 1896 (pp. 18-20), in order to secure priority to Mr. Coekerell, the date of 
issuance of this bulletin being uncertain. — L. O. H. 
Aspidiotus townsendi n. sp. 
Female scale. — On upper side of leaf, 1 to 1J mm. in diameter, circu- 
lar or slightly oval, quite flat, thin, grayish white or rather almost trans- 
parent. Exuviae central or nearly so, covered, round, pale orange, 
strongly contrasting with scale. First skin placed rather to the side of 
the second. 
Male .scale. — Similar but smaller and elongate, with the exuvke 
toward one end. 
Adult female. — Orange, when boiled in soda becoming colorless, with 
the terminal portion tinged with brown. Shape subeireular, occasionally 
renifonn. Four groups <>1* ventral glands, cephalolaterals 4 to 8, caudo- 
laterals 5. Anal orifice large, oval, about twice its length from hind 
end. Two pairs of rounded lobes, median largest, not contiguous. 
Kounded incisions between the lobes, as in ur<t\ ancylus, vydonia\ etc 
Plates forming a scaly fringe in the region of the lobes. Margin cepli 
alad of the lobes, with six spine-like plates, blanched at tips, the first 
(caudad) three the largest. An irregular row of oval dorsal pores some 
distance from margin of terminal portion. 
Habitat. — Cindad Porfirio Diaz (Pied i as Negras), Coahuila, Mexico, 
November 17. 4S!>4, on leaves of tree with entire or very slightly toothed 
ovate lanceolate Leaves, 3i> to 57 mm. long. (Townsend; l)iv. Bnt. Dept. 
Agr. No. 0400.) 
1 am obliged to regard this as a new species, but it is very near to 
A. uvw Comst., and especially to the u physiological species" A. color - 
at us Ckll., which latter lives on Chilopsis in the Mesilla Valley, New 
Mexico. In coloratm both scale and exuviae are concolorous pale orange 
blown, whereas in townsendi the scale and exuvia' strongly contrast. 
On superficial examination, the present species might perhaps be con- 
founded with aurantii, articulatus, or dictyospermi, but a microscopical 
examination at once shows marked differences from any of these. 
Aspidiotus yuccae n. sp. 
Female scale. — Small, greatest diameter about 1 mm. or a little over. 
Oval, moderately convex, dirty whitish, with the covered, inconspicuous, 
pale brown exuvke to one end. Exuvke when rubbed appear shining 
dark brown or black, very conspicuous. The scales leave a white mark 
when removed from the plant. 
Adult female (boiled in alkali). — Transparent, very pale yellowish, 
sometimes browmish j mouth-parts and end of body tinged a deeper yel- 
