DIALEURODICUS PULCHERRIMUS. 81 
DESCRIPTION. 
Egg. — Length about 0.32 mm; color shiny brown or blackish, with- 
out markings; stalk short (PL VI, fig. 1). 
Pupa case. — Size about 1.7 mm. long by 1.40 mm. wide ; case flat, 
applied closely to leaf, the body segments distinct as transverse 
ridges; color, under hand lens, shiny dark brown or blackish (PL VI, 
% 2). 
The specimens in hand show no waxy secretions from dorsum of 
case nor from the marginal wax tubes. The larva? have a narrow 
fringe all around the white wax from the marginal wax tubes. Under 
microscope, pupa case«brown, the more central portion darker; lighter 
bands, more evident on the sides, extending transversely across dor- 
sum, marking the segments. 
Case without the compound wax pores present in Aleur odious, and 
the simple wax pores, scattered over dorsum in cockerellii, are, in 
the present species, absent. There are, however, numerous minute 
clear points over entire dorsal surface, some occurring singly and 
others in pairs, one of which is smaller (PL VI, fig. 7). The mar- 
ginal wax tubes are quite distinct ; the incisions deep and acute, notably 
more so than in oockerellii. Just within the margin all around is a 
series of simple wax pores on the marginal wax tubes. (PL VI, 
%• 8.) 
Case very flat, the lighter specimens showing a coarse network of 
darker lines on dorsal surface (PL VI, fig. 2) ; margin without spines 
or setse. Vasiform orifice cordate, about as broad as long; caudal 
end terminating in a subcircular orifice or pore; operculum subrec- 
tangular, the sides rounded and margins straight — about twice as 
wide as long. Lingula not exserted, stout, subspatulate, bearing two 
pairs of spines. (PL VI, fig. 6.) On ventral surface, legs, antenna?, 
and rostrum quite distinct ; antennae rather short, ending in a finger- 
like process ; rostrum unusually well developed, being about 0.18 mm. 
long; legs short, stout, ending in single hook. (Figs. 3-5.) 
A dults. — Unknown. 
Type. — No. 14762, U. S. National Museum. Described from sev- 
eral pupse in balsam mounts and specimens on foliage. 
Dialeurodicus pulcherrimus n. sp. 
(PL VIII, figs. 1-8.) 
This species differs from the typical form in the genus by having 
the frons produced acutely and extending beyond the cone of the 
vertex. The shape of the pupa case is also somewhat different from 
that of coclcerellii. The general characters, however, seem to ap- 
proach most nearly to those of DMeurodiciis. 
