Maskell. — 0)1 Aleurodidae. 441 



(ap. Riley and Howard) has also foui-teen ; A. oniattis has 

 glands "practically as in A. anoncB" ; but in A. imlvinata 

 there are twenty-two of these organs. No author mentions 

 minute dorsal spinnerets within the margin, such as those 

 which are so extremely numerous in A. pulvinata; yet, as 

 these appear to be certainly the producers of the ring of waxy 

 threads, they are of importance. As regards the vasiform 

 orifice and lingula, I find those of A. auoncB (which Mr. Morgan 

 curiously terms the "anus, colon, and ilium") and those of 

 A. cocois not greatly dissimilar; in fact, they may be said to 

 be practically identical. These organs are not mentioned for 

 A. ornatus. In the figure 41b of A. cocois (Ins. Life, 1893, 

 p. 314) the lingula of the adult female is shown as protruding 

 considerably from the abdomen ; probably this will also be the 

 case in A. imlvinata. 



I believe that the wings of A. pulvinata will be not far 

 removed from the darkly-banded ones of A. ornatus ; but in 

 the face of the statement that the " larva " of that species is 

 " grey," and in the absence of any further information, I shall 

 not at present so identify the insect, nor shall I yet relegate it 

 to the genus Aleiirodicus. 



49. Aleurodes quercus, Signoret. Ann. de la Soc. Entora. 

 de France, Dec, 1867, p. 384. 



50. Alearodes ribium, Douglas. Ent. Mo. Mag., 1888, 

 p. 265 ; 1889, p. 256. 



51. Aleurodes rubi, Signoret. Ann. de la Soc. Ent. de 

 France, Dec, 1867, p. 382. 



52. Aleurodes rubicola, Douglas. Ent. Mo. Mag., 1891, 

 p. 322. 



53. Aleurodes sacchari, Maskell. Trans. N.Z. Inst., 1889, 

 p. 171. 



The vasiform orifice of this species is situated on a project- 

 ing tubercle ; it is broader than long, with slightly concave 

 anterior edge ; operculum covering nearly all the orifice ; 

 lingula obsolete. 



54. Aleurodes simplex, Maskell. Trans. N.Z. Inst., 1889, 

 p. 175. 



The vasiform orifice in the pupa is elongate, subconical, 

 with nearly straight anterior edge ; operculum small, scarcely 

 covering a fourth of the orifice ; lingula extending a short dis- 

 tance beyond the operculum, but not reaching the edge of the 

 orifice, cylindrical, with the extremity slightly dilated and 

 emarginate. 



The adult (unknown in 1889) is pale-yellow all over ; the 



