NO. 215G. tiVBFAMILY ALEYRODINAE—QUAINTANCE cG BAKER. 427 



KEY TO SUBGENUS GIGALEURODES. 



1. Pupa case yellowish, without dark coloration on median dorsal area 2. 



Pupa case with more or less dark brown coloration on dorsum 3. 



2. Subcircular in outline, very large, 2.4 by 2.4 mm.; dirty yellowish white; tracheal 



folds well developed, marked with minute white dots; tracheal pore surrounded 

 by a distinct chitinized circular ring within which are several blunt tooth-like 

 projections; vasiform orifice relatively small, about one-fourth length of case 

 from caudal margin; eggs dark brown with coarse polygonal markings., maxima. 

 Oval or elliptic in outline, medium in size, 1.59 by 1.28 mm.; yellowish in color; 

 tracheal folds well developed, marked with minute dots; pore opening just 

 within margin, armed with a few acute teeth or lobes (much resembling citri, 

 except as to character of vasiform orifice) buscki. 



3. Size large, 2.20 by 1.9 mm.; margin of case all round dark brown in color; sub- 



circular in outline; a broad semicircular or linear spot of light yellow on cephalic 

 end, remainder of case brown; tracheal folds not discernible; pores distinct and 

 within margin of case, armed with several blunt stout processes; each pore 

 surrounded by a conspicuous oval light yellow area; margin of case entire, but 



wax tubes conspicuous as corrugations on submarginal area struthanthi. 



Size medium, 1.6 by 1.3 mm.; broadly elliptical in outline, flat; entire surface 

 brownish, the dorsal region dark brown; pore a deep sinus on the margin; 

 margin of case crenula ted; the lobes rounded; incisions acute; immature stages 

 secreting from marginal pores a rim of wax cerifera. 



DIALEURODES (GIGALEURODES) CERIFERA. new species. 



Plate 71, figs. 1-4. 



This species was received by the Bureau of Entomology April 10, 

 1901, from Mr. C. W. Mally, Cape Town, South Africa. The host 

 is Celastrus huxifolius. 



jTgg^ — Length 0.24 mm., elongate, curved; stalk shorter than 

 width of egg at point of attachment; dirty white to brownish in 

 color; surface densely covered with minute sculpturing. 



Pupa case (fig. 1). — As seen on leaf the pupa case is yellowish 

 brown, with dorsal disk dark brown, and is quite conspicuous in 

 contrast with the light-colored lower surface of the leaf of the host 

 plant. There is a fringe all around of glossy wax rods from marginal 

 wax tubes, compact basally, but the rods separating distally. On 

 numerous specimens this fringe is absent, having apparently weathered 

 off. The dorsum is without secretion. The case is flattish and closely 

 apphed to leaf, there being no vertical wax fringe; dorsum slightly 

 raised. This species, though plainly of the citri type, differs in 

 the development of the marginal wax tubes and the presence of the 

 fringe of wax rods. 



Under the microscope the doreal disk is brown ha color, the balance 

 of case being rather uniformly yellow; the shape is broadly elliptical 

 to subcircular; size 1.6 by 1.3 mm.; margin of case beaded by the 

 distinct and functional wax tubes; the incisions shallow and acute. 

 Thoracic and caudal tracheal folds fairly evident, the latter fur- 



