Baker & Moles.— the aleyucdid-i-; of south amekica 639 



indicated as type and A. eugeniae ánd A. aurantii were 

 also referred to this subgenus. 



In a subsequeiit paper, thc white fly [Aleyrodes citri) 

 aud its allies (2), Cockerell cites as additional examples 

 of Bialeurodes, Aleijrodes croceata, A. fodiens and A. pi- 

 peris. Some of the species referred to Bialeurodes by 

 Cockerell do uot belong to the groiip, as understood by 

 US- -i. e., cotesii, piperis, and croceata. The writers believe 

 that Dialenrodes is of geueric rank and ha ve so indica- 

 ted (o). 



While the species of Bialeurodes present a general 

 uuiformity in the presence of certain proraiuent charac- 

 ters, there are to be recognized several minor groups for 

 which it has seemed necessary to erect subgenera. Species 

 of this genus are largely oriental, and some of them are 

 of especial interest by reason of their injuries to plants, 

 as B. citri, citrifolii, etc. 



Pupa case variable in size, elliptic to subcircular in 

 outline; color usnally -yellowish, varying in outline and 

 but little developed; submarginal área not separated frora 

 dorsal disk; dorsum usually without papillae or pores; 

 tracheal folds evident, in some species very conspicuous, 

 terminatiug on raargin of case in a pore, the folds often 

 showing dot-like, linear, or polygonal markings; wax 

 secretions absent or very scant. Vasiform orifice relatively 

 small, transversely oval or subcircular, with or without 

 comb of teeth on inner lateral and caudal margius; oper- 

 culum large, niostly filling the orifice and obscuring the 

 lingula. 



Adult with one flexure in radial sector of forewing 

 and no trace of media. Antennae of seven segraents; 

 segment Yll uot distinctly shorter than segments lY, V. 

 and YI, but usually longer than these. Sexes about equal 

 in size, the claspers of male with a few prominent 

 spines. 



Ti/2)e. — Alei/rodes citri Ashmead. 



i-2| Bull. 67, Fia. Asrio. Exp. Sta.. 1903, p. 662. 



(31 Tech. Ser. 27, Pt. 2, Bur. Ent. U. S. Dept. Agr,. 191i. p. 97 



