aleurodicus (metaleurodicus) cardini. 75 
Aleurodicus (Metaleurodicus) cardini Back. 
(PI. XXVII, figs. 1-10.) 
Aleurodicus cardini Back, Can. Ent., vol. 44, pp. 148-151 (1912). 
Dr. Back's original description is as follows: 
Egg. — About 0.26 mm. long, width about 0.07(5 mm. Elongate oval, uniformly 
pale yellowish, unmarked. Pedicel short; egg lying prone on leaf, often entirely 
surrounded and concealed by fluffy waxen secretions of the adult. Eggs laid 
without regard to arrangement on leaf. 
Larva. — Crawling first instar. Length about 0.319 mm., width about 0.12 
mm. Elongate oval, pale yellowish white in color without darker markings or 
waxen secretions. Thirteen pairs of marginal spines, short, the posterior two 
pairs longer; a fourteenth pair located on venter near margin on cephalic end 
of case. Spine on lower side of distal third of antennae and terminal spine of 
antennae proportionately longer and more distinct than in A. citri or A. nubifera. 
Pupa case. — Length about 0.94 mm., width about 0.64 mm. Subelliptical, 
elevated on a vertical marginal waxen fringe. Color yellowish to yellowish 
white, after emergence empty case whitish, semitransparent ; parasitized speci- 
mens appear blackish either throughout or in spots. Margin entire, without 
pattern of any sort; near margin is a series of wax pores. On venter near 
margin are eighteen or twenty inconspicuous bristles seen only with high magni- 
fication ; of these, three pair, one cephalic, and two caudad, are more conspicu- 
ous. On dorsum nearer the margin than center are five pairs of round, well- 
defined compound pores, four pairs on abdominal segments and one pair on 
cephalic region. Cephalad of vasiform orifice is a pair of minute bristles. Vasi- 
form orifice elongate cordate, about 0.09 mm. wide at base, and about 0.1 mm. 
long from base of operculum to tip of lingula ; cephalic margin straight, caudal 
and [end] evenly rounded. Operculum subelliptical nearly one-half as long as 
orifice. Lingula broad, extending well beyond caudal end of orifice, on distal 
fourth which usually lies beyond caudal end of orifice with two pairs of com- 
paratively long setae. Rudimentary legs and antennae as usual. 
From wax pores on dorsum, there may be frequently seen protruding white 
glistening waxen rods which frequently break off and fall about the pupae as in 
P. persew. The dorsal surface of case usually becomes, especially towards 
maturity, well dusted with a thin coating of white secretions, and at times a 
very narrow, downwardly directed marginal fringe may be seen outside the 
vertical fringe. 
Adult. — Length, $ , about 1.16 mm. ; forewing, 9 . 1.39 mm. by 0.62 mm. ; 
length hind femur, 0.26 mm. Length hind tibia, 0.35 mm. ; length hind tarsi, 
0.18 mm. ; length claws, 0.08 mm. ; 9 proportionately larger. Yellow, covered 
with whitish waxen secretion ; eyes red, not divided, but distinctly constricted. 
A line extending along side of head, interrupted by upper portion of compound 
eye, the lateral callosities of prothorax, indistinct traces along suture of proxi- 
mal segments of abdomen, and portions of vasiform orifice, all blackish. Wings 
beautifully iridescent, with deep violescent reflections, a small prominent round 
brownish spot about 0.06 mm. in diameter on each fore and hind wing just 
behind the posterior distal branch of vein, usually enveloping vein but never 
filling the angle between veins as shown in A. mimos [minima] (Tech. Bull. 8, 
Div. Ent., Dept. Agric, PI. VI, fig. 6), wings otherwise unmarked. Antennae 
seven- jointed, the comparative lengths of the various segments as follows: 
Segments &, f , yfy, f, ^, &, &. 
61201°— 13 6 
