31 
26. Aleurodes nicotiane Maskell. 
Trans. N. Z. Inst., 1895, p. 436; Entom. News, VII, p.247. On Nicotiana tabacum, 
Guanajuato, Mexico. 
27. Aleurodes parvus Hempel. 
Psyche, vol. 8, No. 280, p. 395. On Maytenus sp., 8. Paulo, Brazil. 
28. Aleurodes pergandei n.sp. (Plate ITI, figures 54-37, and Plate VII, figure 72. 
Pupa-case.—Size about 0.78 by 0.5 mm.; regularly elliptical in shape; 
pale yellow in color, but the empty case almost colorless. The most 
striking character of this species is the exudation from the dorsum of 
long, white, curled filaments or bundles of wax, forming a beautiful 
and relatively large rosette. Near the margin on dorsum is a series 
of long, curled, and slightly flattened bundles, which, extending out- 
ward and downward, touching surface of leaf, becoming irregularly 
coiled at the free end. So copious is this exudation that it may have 
a diameter of 3 mm., although the pupa-case itself is but 0.78 mm. 
long. From the central dorsum there is usually a stouter form of 
exudation, somewhat columnar, but not extending very high from 
case. 
These bundles of wax are composed of many very minute glassy 
threads of wax, which in the longer lateral bundles become quite loose 
and separated on the lower surface of bundle. 
On the dorsum, but very close to margin all around, is a series of 
rather closely set, more or less circular, pores. These occur about the 
diameter of a pore apart. From this series of pores is produced a 
fringe of rather long, tapering, and somewhat curved glassy rods. 
These project out laterally, around the pupa-case, as is usual in species 
of this type, but are hardly discernible until after the removal of the 
copious rosette of white wax from the dorsum. There is no fringe 
from the marginal wax tubes, although these form a distinct lateral 
rim. The margin is crenulated, with the incisions acute. There is a 
moderately developed vertical fringe, raising the pupa case up some- 
what from surface of leaf. On caudal margin there is a pair of 
moderately developed sets, and the usual small caudo-lateral pair of 
sete is present. There isa pair of small sete also at vasiform orifice. 
Vasiform orifice broadly ovate, almost as broad as long; cephalic 
margin straight, caudal end very broadly rounded. Operculum but 
little more than one-half the length of orifice, and wider than long; 
cephalic margin straight, and almost coincident with margin of orifice. 
Lingula about five-sixths length of orifice, stout, and broadly spatulate. 
Distal portion with three pairs of lateral lobes and a terminal lobe; 
also bearing a pair of setee, which project caudad out beyond orifice. 
Distal portion of lingula setose in the usual way. 
Adult 9.—Length about 0.77 mm.; fore-wing 1.07 by 0.5 mm.; 
length of hind tibia 0.37 mm.; length of hind tarsus 0.23 mm. Color 
