28 
21. Aleurodes graminicola Quaintance. 
Can. Rat., Vol. XXXI. p. 89. On an undetermined grass, Lake City, Fla. 
22. Aleurodes horridus Hempel. 
Psyche, vol. 8, No. 280, p. 394. On Iridium sp., S. Paulo, Brazil. 
23. Aleurodes inconspicua n. sp. (Plate II, figures 23-25.) 
Egg. — About 0.17 mm. long. Oval in shape, uniformly brownish 
in color; unmarked. Pedicel very short. 
Larva. — Size about 0.5 by 0.3 mm. Elliptical, tapering slightly 
caudad. In color light yellow, with a deep orange spot on each side 
of abdomen. Body flat, no marginal fringe, and without dorsal exu- 
dation. Margin of case practically as in pupa-case. There is a pair 
of well-developed setae, projecting caudad from caudal margin of 
case, arising apparently on the margin. Dorsum void of setae. Vasi- 
form orifice practically as in pupa-case, but the furrow extending 
caudad from orifice to margin in the pupa-case seems to be wanting 
in the larva. There are two small reddish-brown pigment spots in 
cephalic region, marking the eyes. 
Pupa-case. — Size about 0.83 by 0.55 mm. but varying somewhat. 
Oval in shape, broadest cephalad, and light }^ellow in color, the color- 
ation deepening as the developing insect approaches maturity. Empt} T 
pupa-case colorless. On each side of abdomen in } T ounger pupa-cases 
there is an irregular, oblong spot of deep orange yellow, evidently 
glands, within the body. As the pupa develops these spots tend to 
disappear. Case applied closely to leaf, at first flat, but later becom- 
ing somewhat convex. From its flatness and color it is quite incon- 
spicious on the leaf. There is apparently no lateral fringe, and the 
vertical fringe raising the case from the surface of leaf, so common 
in aleurodids of this type, is in this species absent. Marginal wax 
tubes but Little evident, and the incisions usually short and acute. 
From these incisions thickenings extend mesad some distance, pro- 
ducing an irregularly marked margin. There is a pair of small seta 1 
on the 1 caudo-lateral margin of case. Dorsum without exudation of 
wax: there is a more or less evident dorsal keel along dorsi-meson, 
more pronounced along abdomen. Some specimens show three rows 
of large circular pores; a row along dorsi-meson and a subdorsal row 
on each side. These pores vary much in position and number, and 
are more frequently not discernible. Dorsum without seta-, except a 
well-developed pair, arising from tubercles jusl within caudal margin 
of dorsum. 
Vasiform orifice, subtriangular about three-fourths as w ide as long; 
cephalic and lateral margins nearly straight lines. Lateral margins, 
with corrugations or folds, extending downward and inward. At 
caudal end of orifice there is a decided ental bend, or loop, of the rim, 
the orifice thus opening into a furrow which extends caudad to margin 
of case, between the two tubercled seta'. 
