26 CLASSIFICATION OF THE ALEYRODIDiE. 
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Genus DIALEURODICUS (Cockerell) n. gen. 
Forewing with radius^ radial sector, and media retained. Vertex 
produced into a prominent cone-shaped process. Antennae of seven 
segments, of which the third is the longest. Paronychium of the 
foot represented by a stout spine. Pupa case flat; no compound 
pores present but simple pores, either scattered over the surface or 
somewhat collected into areas; vasiform orifice small, lingula setose, 
short conical, included and armed with four spines. 
Type, cockerellii Quaint ance. 
Species of Dialeurodicus. 
I. Dorsum of pupa case with scattered simple pores; large, oval, flat, size 
about 1.63 by 1.23 mm., yellowish brown; surface without reticula- 
tions; wax tubes forming the marginal rim, separated by rather 
shallow incisions. Adults with large spotted wings cockerellii. 
II. Dorsum of pupa case without scattered simple pores ; large, oval, flat, size 
about 1.7 by 1.40 mm. Dark brown to blackish (shiny jet-black 
on leaf) ; surface with some reticulations ; wax tubes forming 
margin of rim, separated by deep incisions tessellatus. 
III. Dorsum of pupa case with scattered simple pores and a broad subdorsal 
band all around of closely set simple pores divided by body sutures 
into six more or less distinct patches. Subovate in shape, 
size 1.5 by 1.12 mm., marginal wax tubes separated by shallow 
incisions silvestrii. 
IV. Dorsum of pupa case with four pairs of wax-secreting pores on abdominal 
segments 4 to 7 and a submarginal rim all around of simple pores. 
Dorsal disk dark brown, with four radiating patches of same color 
on each side. Shape elongate, elliptical, narrowed cephalad, size 
2.36 by 1.28 mm. Margin of case entire pulchcrrimus. 
Dialeurodicus cockerellii (Quaintance). 
(PI. IV, figs. 1-14; PI. VII, fig. 1; text fig. 3.) 
Aleurodicus cockerellii Quaintance, Tech. Series 8, Div. Ent, U. S. Dept. 
Agr., p. 45, (1900). 
ORIGINAL DESCRIPTION. 
Pupa case. — Size about 1.63 by 1.23 mm.; subovate in shape, smaller end 
cephalad. Color uniformly yellowish. There is but slight waxy exudation 
from dorsum, which Is move or loss mealy. No wax rods have boon observed. 
Dried specimens separate easily from leaf, leaving usually a ring of white 
mealy wax of the size and shape of case; extending from the periphery inward 
are lighl lines of this mealy wax, more or loss distinctly marking the position 
of the abdominal sutures of the case. Dorsum of pupa case almost flat, but as 
seen under a band ions is much wrinkled transversely in dried material. These 
folds or ridges occur mainly along the body segments and posteriorly become 
much curved around tin- rasiform orifice. Under the microscope the abdominal 
segments are Indistinct and scarcely elevated, except In the medio-dorsal line, 
where a slight rounded keel may be observed. .Margin of case practically en- 
