GENUS ALEUROTHRIXUS. 103 



Genus ALEUROTRACHELUS n. gen. 

 (PI. XLI, figs. 7-9; PI. XLVI, fig. 4.) 



Pupa case mostl}'' of medium size, elliptic in outline, the cephalic 

 margin somewhat ])ointed; color brown to blackish; margin of case 

 with a double row of teeth, the wax tubes well developed ; submarginal 

 area not separated from the dorsal disk; dorsum without j)ores or 

 papillae, though body sutures are very prominent and aiong each side 

 near center there is a prominent fold. Along median line of dorsum 

 is a trachea-like ridge, terminating cephalad in an arrow-shaped figure 

 and caudad in the vasiform orifice. Tracheal folds not discernible; 

 wax secretion usually present as a fringe from marginal wax tubes, 

 Vasiform orifice small, broadly cordate ; operculum similar in shape, 

 obscuring the lingula. 



Type, iracheifer Quaintance. 



Species of the Genus Aleurotrachelus. 



A. eamellise (Kuwana), Pomona Jouru. Ent., vol. 3, no. 4, p. 625 (1911). 



A. croceatus (Maskell), Trans. New Zealand Inst., vol. 28, p. 428 (1895). (Aus- 

 tralia.) 



A. fumipennis (Hempel), Psyche, vol. 8, p. 394 (1899). (Brazil.) 



A. limbatu^ (Maskell), Trans. New Zealand Inst., vol. 28, p. 436 (1895). (Aus- 

 tralia.) 



A. parvus (Hempel), Psyche, vol. 8, p. 395 (1899). (Brazil.) 



A. tracheifer (Quaintance), Tech. Ser. 8, Div. Ent., U. S. Dept. Agr., p. 38 (1900). 

 (Mexico.) 



A. trachoides (Back), Canad. Ent., vol. 44, p. 151 (1912). (Cuba.) 



Genus ALEUROTHRIXUS n. gen. 

 (PI. XLI, figs. 1-6; PI. XLVII, fig. 4.) 



Pupa case medium to small in size, elliptic; margin sometimes 

 angled; color variable, ranging from yellow to blackish; margin of 

 case with double row of teeth, the wax tubes well developed; sub- 

 marginal area not separated from dorsal disk; dorsum without papillae 

 or pores, but bearing along median line a few pairs of long, spinelike 

 hairs; tracheal folds not discernible; wax secretion usually copious, 

 floccident or wooUy, secreted by marginal wax tubes. Vasiform 

 orifice small, transversely elliptic; lingula obscured by the operculiun, 

 which nearly fills the orifice. 



Adidt with one flexure in radial sector of forewmg and no spur of 

 media. Antennae of seven segments, of which III is the longest. 

 Sexes nearly equal in size. 



Type, howardi Quaintance. 



Species of the Genus Aleurothrixus. 



A. ofpim (Goeldi), Mittheil. schweiz. ent. Ges., vol. 7, p. 250 (1886). (Brazil.) 

 A.Jloccosus (Maskell), Trans. New Zealand Inst., vol. 28, p. 432 (1895). (Jamaica; 



Mexico.) 

 A. horridwi (Hempel), Psyche, vol. S, p. 394 (1899). (Brazil.) 



