DIALEUEODICUS COCKERELLII. 



27 



tire. Very slight furrows or thiclcenings extend mesad a short distance from 

 uiiirfxiii of case, rather marking the margin into more or loss distinct roctangniar 

 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 set;c at vasiform orifice, and very minute set;e occur here and 

 there on the dorsum. The five or more pairs of large comiwund pores, so usual 

 tin 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. 



\'asiform 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- 

 tally two pairs of setse, 



the smaller pair proxi- , 



mad; minutely setose. ' "^ 



Rudimentary legs 

 and antenna? on ventral 

 surface quite distinct. 

 Distal joint of legs 

 with a straight and 

 truncate spine. Anten- 

 nae usual, minutely 

 ringed. 



Adult $ . — Length, 

 about 1.06 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 

 tw(r 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 seta? 

 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 Dialeurodicvs cockercUii. (Original.) 



