Maskell. — On Aleurodidas. 423 



' Eggs elliptical, with a short peduncle for attachment to 

 the leaf. 



The relationship between Aleurodes and a Coccid of the 

 section Lecanince, or a Psyllid of the section Triozince, is very 

 noticeable in the earlier states ; and the principal character 

 by which it can be distinguished is the vasiform orifice, which 

 has its counterpart in a Lecanid in the abdominal lobes, and 

 in a Triozid in the "anal ring" (see my paper on Psyllida, 

 Trans. N.Z. Inst., 1889). Another, but less conspicuous, 

 difference is in the feet : in a Lecanid there is but a single 

 claw, and in a Psyllid the two claws have beneath them a 

 fan-shaped pad. The adult Aleurodes differs from Coccids in 

 the possession of four wings in both sexes, and from Psyllids 

 in the single median vein of both wings. 



For a reason of which I am not aware, the word " Aleu- 

 rodes " has been treated by all authors as feminine. I have 

 not thought it worth while io disturb the arrangement. 



1. Aleurodes abutilonea, Haldeman. Journ. Araer. Soc. 

 Sci. and Arts, 1850, 2nd ser., p. 108. 



2. Aleurodes aceris, Geoffroy. Chermes aceris ovatus, Geoff., 

 Hist. abr. des Insectes, 1764, p. 509; Aleurodes aceris, 

 Barensprung, Zeit. fur Zool. Alton und Burm., 1849, 

 p. 176 ; Bouche, Entom. Zeit. Stett., 1851, p. 108 ; Frauen- 

 feld, Yerh. Zool.-Bot.-Gesellsch., Wien, 1866, p. 795; 

 Siguoret, Ann. de la Soc. Entom. de France, Dec, 1867, 

 p. 394. 



3. Aleurodes aepim, Goldi. Mittheil, Schweitz. Entom. - 

 Gesellsch., vh., 1886, p. 250. 



4. Aleurodes asparagi, Lewis. Journ. Quek. Micr. Club, 

 1895, p. 88 ; Eep. EaHug Soc, 1893, p. 1. 



5. Aleurodes asplenii, Maskell. Trans. N.Z. Inst., 1890, 

 vol. xxii., p. 173. 



Yasiform orifice subconical ; operculum small ; lingula 

 moderate, clavate. 



6. Aleurodes avellanse, Signoret. Ann. de la Soc. Entom. 

 de France, Dec, 1867, p. 385 ; Douglas, Ent. Mo. Mag., 

 1894, vol. XXX., p. 154. 



7. Aleurodes banksiae, Maskell, sp. nov. Plate XXY. — 1. 

 Larva brown, elliptical ; length about ^^-in. Margin dis- 

 tinctly crenulated, but bearing no fringe. Abdominal seg- 

 ments fairly distinct. Dorsum bearing, within the margin, a 

 row of longish, strong spines, of which four, on the anterior 

 region, extend beyond the margin ; also, on the anterior 



