32 
of body light yellow, legs and antenne paler. Eyes reddish brown, 
and apparently barely divided, each part subequal and subcircular 
in outline. Wings immaculate. Antenne of 7 joints: Joint 1, short, 
usual; joint 2, subpyriform and obliquely truncated distally; joint 3, 
long, subcylindrical, about four-fifths as long as joints 5, 6, and 7 
together; joints 5 and 6, subequal, and somewhat longer than joints 
4 and 7, which are subequal. In hind legs, femur about three-fifths 
length of tibia, middle tarsus three-fourths length of hind tarsus. 
In fore-wing, basal veinlet arising at very base of wing, and appar- 
ently distinct from median. Genitalia usual. 
Collected on the grounds of the Department of Agriculture at 
Washington, D. C., by Mr. Theodor Pergande on Lignonia radicans, 
September 3, 1881; at Washington, D. C., Crategus, September 22, 
1882; in Virginia, on Hydrangea, September 27, 1897. This same 
species was collected by the writer on plum, at Pomona, Ga., May 20, 
1899, and on Crategus, Flint River, Spalding County, Ga., during 
August, 1899. 
This insect occurs either singly or in groups of three or four on the 
under surface of the leaves. It is at once one of our prettiest and 
most striking Aleurodids. I have pleasure in naming this species for 
Mr. Pergande. Div. Ent., Nos. 1002, 2861, and 7800. Type, No. 1002. 
Pupa-case described from numerous specimens; adult @ from 3 
specimens; slide 1-32-39. 
29. Aleurodes persezn. sp. (Plate IV, figures 38-40.) 
Larva.—(Very young, probably in first stage.) Size about 0.338 
by 0.18 mm.; subelliptical, very slightly narrowed caudad. Pale yel- 
lowish white, with more or less rectangular spots of orange in the 
abdominal region. Eye spots reddish. On the margin, cephalad of 
eyes, are six sete, and on lateral margins of thoracic region are three 
on each side. On caudal margin are six setae, the middle pair of which 
is considerably longer than others. On ventral surface, just within 
margin, all around, is a series of sparsely set small tubercled sete. 
Legs and antenne well developed. Vasiform orifice practically as in 
pupa-case. 
Pupa-case.—Size about 0.86 by 0.53 mm.; shape subelliptical, with 
slightly undulate outline. Color under hand lens, yellowish brown; 
empty pupa-case practically colorless. There seems to be no lateral 
fringe, and the margin is not perceptibly crenulated, or but very indis- 
tinctly; no lateral wax tubes are to be observed, though there is a 
thickened line on the margin. There is a profuse dorsal exudation: 
First, a rather short, downward-curving fringe of pearly white wax, 
all around, arising from just within margin, and curling outward and 
downward over margin to near surface of leaf. This fringe is hardly 
continuous but is more or less split apart into ribbons or bands. See- 
