NO. 2156. SUBFAMILY ALEYRODINAE—QUAINTANCE & BAKER. 435 



Egg (fig. 4). — Elongate elliptical, yellowish in color, without reticu- 

 lations; size 0.17 by 0.077 mm. ; stalk about one-half as long as the egg. 



Pwpa case (fig. 1). — Color on leaf dirty yellow; dorsum moderately 

 convex; no dorsal or lateral secretions, except from submarginal area 

 usually some 10 to 12 short waxen rods. 



Under the microscope the case is seen to be almost transparent, the 

 segments moderately distinct. Size about 0.95 by 0.65 mm., sub- 

 elhptic in outline, narrowing cephalad. Margin of case faintly 

 crenulate (fig. 3), surrounded by a narrow zone paler than ad- 

 jacent submarginal areas and separated from it by a more or less 

 evident yellowish, thickened line. Within the margin there is a 

 series of rather short spines, and along median line of case are several 

 pairs of setae, as shown in figure 1. On each side of case, in sub- 

 marginal area, are five large pores (figs. 1 and 2). Tracheal folds 

 fairly evident and sparsely marked with dots (figs. 2 and 3). Vasiform 

 orifice broadly subcordate, without teeth on inner margin. Opercu- 

 lum similar in outline, nearly filling orifice (figs. 2 and 6). 



Adult. — Unknown. 



Type. — Cat. No. 19059, U.S.N.M. Described from numerous speci- 

 mens on foliage and in balsam mounts. 



DiALEUROPLATA, new subgenus. 



This species was taken by C. H. T. Townsend in 1904, in the 

 Phihppine Islands. In general appearance it has many of the 

 characters of typical species of the genus Aleuroplatus. It has some- 

 what the same shape and color. It possesses numerous minute pores 

 in the same regions, and the abdominal divisions are somewhat similar. 

 It is much more completely a Dialeurodes, however, than it is an 

 Aleuroplatus, and we erect for it the above subgenus. It seems 

 further to confirm the apparently close relation of the two genera, 

 Dialeurodes and Aleuroplatus. 



Pupa case. — Elliptical, broadest across the abdomen, shghtly con- 

 stricted at the thoracic tracheal pores; color brownish; marginal 

 wax pores represented by shallow somewhat irregular tooth-like 

 corrugations; submarginal area with an irregular series of minute, 

 circular, pore-hke structures; dorsum with a slight rhachis develop- 

 ment, particularly upon the abdomen, and with a number of minute 

 pores. Thoracic tracheal folds not distinct; tracheal pores irregu- 

 larly lobed or toothed within; vasiform orifice broadly subcordate, 

 inner caudal and lateral margins without teeth; operculum similar 

 in shape, nearly filling the orifice. 



Type. — Dialeurodes (Dialeuroplata) townseridi Quaintance and Baker. 



