DIALEUEODICUS COCKERELLII. 
27 
tire. Very slight furrows or thickenings extend mesad ;i short distance from 
margin of case, rather marking the margin into more or less distinct rectangular 
figures. Just within the margin all around is a series of very small disc-like 
pores, usually one to each of these marginal rectangles. Dorsum void of well 
developed setae, except a pair just within the caudal margin; but there is a 
pair of small setae at vasiform orifice, and very minute setae occur here and 
there on the dorsum. The five or more pairs of large compound pores, so usual 
on dorsum of pupa case of Aleurodicus, seem to be absent in this species, but 
very many minute transparent pores may be detected on dorsum under high 
power of microscope. 
Vasiform orifice subcordate, somewhat longer than wide; cephalic margin 
straight; at caudal end there is a short, stout, spine-like protrusion. Opercu- 
lum subrectangular. about half length of orifice; cephalic and caudal margins 
practically straight, lateral margins rounded ; lateral and caudal margins thick ; 
minutely setose. Lingula quite as long as orifice, very broad, and bearing dis- 
tal! y two pairs of setae, 
the smaller pair proxi- 
mad; minutely setose. 
Rudimentary legs 
and antennae on ventral 
surface quite distinct. 
Distal joint of legs 
with a straight and 
truncate spine. Anten- 
na? usual, minutely 
ringed. 
Adult 9 . — Length, 
about 1.96 mm. ; fore- 
wing, about 2.4 by 1.6 
mm. ; length of hind 
tibia, 0.8 mm. ; length 
of hind tarsus, 0.56 
mm. ; length of front 
tarsus, 0.32 mm. ; color, 
bright yellow, legs and 
antennae paler; wings very broad, and rounded distally. Wings marked with 
more or less circular spots of brownish black. In forewings, along cephalic 
margin, are three spots about equidistant, and farther distad, on curve of wing, is 
a spot somewhat farther from the third spot than are two and three from each 
other. There is a spot on the margin of outer caudal curve of wing and three 
spots on the caudal margin, which, however, are not equidistant, as in the spots 
on cephalic margin. Within the area bounded by the distal fork of the vein are 
two spots, and within the area bounded caudad by the proximal branch are from 
three to five spots. In hind wings there is a spot on outer cephalic margin, 
and on the outer caudal margin are two spots. There are two spots in the 
area bounded by the distal fork of vein, and likewise two spots in the area 
bounded caudad by the proximal branch of vein. Head as seen from above 
acute cephalad, and margined with deep reddish or brownish black, con- 
tinuous with eyes which are of same color. Joint 1 of antennae short, sub- 
cylindrical, distal and irregularly notched or toothed. Joint 2 thick, club- 
shaped, about three times longer than basal and bearing two or three setae 
on outer lateral surface. Joint 3 quite long — quite twice the length of fourth. 
Distal joint short, terminating in a single seta. 
61201°— 13 3 
Fig. 3. — Head of Dialeurodicus cocke.reUii. (Original.) 
