GENUS DIALEUKODES. 97 



B. Pupa case ^^th a submarginal row of papilla-like pores an J with the dorsal 



disk not separated from the submarginal area. 

 1. Vasiform orifice subcordate, with anterior margin straight. 



a. Thoracic folds \risible and ending in a comb of teeth; operculum 



nearly filling the orifice and obscuring the lingula. 



A leuroparadoxus. 



b. Thoracic tracheal folds not distinct; lingula visible caudad of 



operculum, lobed Asterochiton. 



C. Pupa case usually without a row of submarginal papillae and with tlie dorsal 



disk distinctly separated from the submarginal area by a suture-like 

 line or depression. 



1 . Dorsum covered with a large number of mammiform pores . . A leurotithius^ 



2. Dorsum without large mammiform pores. 



a. Vasiform orifice rounded or cordate, elevated, and not surrounded 



by a lobed or palmate area Telraleurodea. 



b. Vasiform orifice subcordate, surrounded by a definite lobed area 



with a channel extending caudad Aleurolobus^ 



Genus DIALEURODES (Cockerell) n. gen. 

 (PI. XXXV, figs. 1-14; PI. XLVI, fig. 1.) 



Pupa case variable in size, elliptic to subcircular in outline; color 

 usually yellowish, varying in some species to brownish; margin of 

 case toothed, the wax tubes irregular in outline and but little devel- 

 oped; submarginal area not separated from dorsal disk; dorsum 

 without papillae or pores; tracheal folds evident, in some species 

 very conspicuous, terminating on margin of case in a pore, the folds 

 often showing dotlike, linear, or polygonal markings; wax secretion 

 absent or very scant. Vasiform orifice relatively small, transversely 

 oval or subcircular, with or without comb of teeth on inner lateral 

 and caudal margins; operculum large, mostly fiJling the orifice and 

 obscuring the lingula. 



Adult with one flexure in radial sector of forewing and no trace of 

 media. Antennae of seven segments, segment VII not distinctly 

 shorter than segments IV, V, and VI, but usually longer than these. 

 Sexes about equal in size, the claspers of male with a few prominent 

 spines. 



Type, citri Riley and Howard. 



Species of the Genus Dialeurodes. 



D. citri (Riley and Howard), Insect Life, vol. 5, p. 219 (1893). (Southern I uited 



States; Chile (?); China; India; Japan, etc.) 

 Syn.: aurantii Ma&kvW. 

 D. citrifoUi (Morgan), Spec. Bui. La. Agr. Exp. Sta., p. 70 (1893). (Southern 



United States; Cuba; Mexico.) 

 Syn.: nubifcra Berger. 

 D. eugenix (Maskell), Trans. New Zealand Inst., vol. 28, p. 430 (1895). (India.) 

 i)./ju7isi's (Kotinsky), Bui. 2, Div. Eut., Board Comm. Agr. ct Forestry, Hawaii, 



p. 100 (1907). (Fiji.) 

 D. fodicns (MaskeU), Trans. New Zealand Inst., vol. 28, p. 433 (1895). (New 



Zealand.) 



