420 PBOCEEDINOS OF THE NATIONAL MUSEUM. vol. 51. 



Vasifomi orifice (fig. 11) subcordate, the inner caudal margin armed 

 with 12-14 prominent teeth or fimbriae. Operculum about half 

 filling orifice and of same general outline, mmutely setose on caudal 

 margin. Lingula (fig. 12) Ungulate and setose, with a pair of spines 

 on distal end. 



Adults. — Unknown. 



Described from 5 pupa cases in balsam mount. 



Type.— Csit. No. 19050, U.S.N.M. 



RusosTlGMA, new subgenus. 



This group is represented by species from India, Japan, and the East 

 Indies. 



Pupa case broadly elliptical or subcircular, yellowish, with some- 

 times a median brownish or blackish area; marginal wax tubes repre- 

 sented somewhat as in subgenus Dialeurodes; wax secretion usually 

 absent; dorsal disk without large pores or a distinct rhachis, but 

 often marked with minute semicircular or polygonal markings in the 

 derm ; thoracic tracheal folds prominently sculptured with polygonal 

 markings, and openmg, usually a short distance within the margin, in 

 a distinct pore which is armed with a number of teeth; vasiform 

 orifice broadly subcordate, its inner caudal and lateral margins with- 

 out a comb of teeth; adults with forewings rather broader than in 

 Dialeurodes, usually somewhat heavily and more or less irregularly 

 clouded, veins somewhat thickened and often possessing sensoria. 

 (Antennae absent from the specimens m hand.) 



Type. — Dialeurodes (Rusostigma) radiirugosa Quaintance and 

 Baker. 



KEY TO SPECIES OP SUBGENUS RUSOSTIGMA. 



1. Median dorsal area without dark brown coloration 2. 



Median dorsal area dark brown with conspicuous cross stripes along body segments; 



remainder of case yellowish; tracheal folds distinct and marked with polygonal 

 areas, pores some distance within the margin; case elliptical; size about 0.8 by 

 0.74 mm.; margin entire; vasiform orifice longer than broad; operculum more 

 than half filling orifice eugeniae. 



2. Thoracic tracheal folds bro\\Tiish, the polygonal markings broadening on the sub- 



dorsal area forming a T-shaped figure; dorsum of case with faint polygonal 

 markings; outline subcircular; size 1.6 by 1.4 mm.; mesal margin of tracheal 



pores with several more or less curved finger like processes radiirugosa. 



Thoracic tracheal folds concolorous with case, the markings not broadening out on 

 subdorsal area into a T-shaped area; submarginal area with semicircular, notched 

 markings in derm wliich gi'aduate into polygonal markings toward dorsal area; 

 color of case yellowish, elliptical in outline and rather convex; size about 1.52 

 by 1.28 mm.; eggs small, brown tokyonis. 



