42 CLASSIFICATION OF THE ALEYRODID^. 



Subgenera of Aleurodicus. 



I. Lingulfi of pupu case long, spatulate or conical, exserted ; linsula of adult 

 long, narrow, and included; compound i)ores as illustrated in Plate 

 III, fig. 2. 



A. Sides of pupa case flat, not deflexed under ventral surface; vertex of 



adult roundetl Subgen. Aleurodicus. 



B. Sides of pupa case deflexed under ventral surface; vertex of adult 



slightly bilobed Subgen. Lecanoidciis. 



11. Lingula of pupa case short, conical, usually included; liugula of adult broad, 

 rounded, and exserted; compound wax i)ores of pupa case as illus- 

 trated in Plate XXVII, figure 3 Subgen. Mctaleurodicus. 



Subgenus ALEURODICUS n. subgen. 



Fore wings with the veins as given for the genus. Vertex rounded, 

 antennae of seven segments, of which the third is the longest ; claspers 

 of male long and narrow; penis recurved, usually short; pupa case 

 flat, with a number of large compound wax pores of the type illus- 

 trated in Plate III, figure 2, and sometimes a number of small re- 

 duced ones. Vasiform orifice with a long, setose, spatulate exserted 

 lingula, which is armed with four long spines. Size usually large. 



Type, anonce Morgan. 



Species of Subgenus Aleubodicus.<* 



I. Pupa case vyith seven pairs of compound wax pores, one cephalic pair, and 

 six abdominal pairs. 



A. All seven pairs of pores equally developed; size of pupa case 1.33 to 1.5 



mm. long by 0.S3 to 1 mm. wide; pores broad and shallow; 

 margin of case with irregular rectangular areas and a sub- 

 marginal row of strong hairs; outline of case subelliptical to 

 ovate; wings white, unmarked destructor. 



B. The two caudal pairs of wax pores and the cephalic pair more fully 



developed than the other four pairs, and with very long central 

 chitinized processes; size of pupa case 1 by 0.53 mm., shape 

 elliptical; edge of case with large creuulations; egg with the 

 stalk much longer than the egg itself. Case raised on a vertical 

 fringe of white wax and the dorsal surface covered with a plate 

 of fused dirty white wax, through which the compound pores 

 may be seen hnlmc.sii. 



C. The two caudal pairs of pores are much smaller than the other five 



pairs. 

 1. Dorsal disk, as well as the submarginal area, covered with numerous 

 simple pores; compound pores very large and well developed; 

 margin of case entire, with a row of stout hairs just within. 

 Lingula long, with four very prominent hairs; operculum with 



"It has not seemed wise to attempt to include in this key annnw Curtis and cnnspitr- 

 catiis Kndei-lein. In the former species the description is too vague, and in the latter the 

 immatiire stages are as yet unknown. 



