Maskell. — 0)1 Aleurodidie. 427 



abdomen ; the serrations of the wing-margins are also dif- 

 ferent. 



16. Aleurodes corni, Haldeman. Journ. Amer. Soc. Sci. 

 and Arts, 1850, p. 108 ; Signoret, x\nn. de la Soc. Ent. de 

 France, Dec, 1867, p. 398. 



17. Aleurodes cotesii, j\raskell, sp. nov. Plate XXVII. — 1. 

 Larva yellow, the median region darker than the margin ; 



form elliptical ; length about 4^^^- ^^^ ^^^^ earliest state only 

 very faint indications of the insect itself appear, and the 

 whole is very thin and flat ; later on the enclosed future pupa 

 begins to be visible, and the ventral surface becomes more 

 convex ; the eyes also appear. The larval integument becomes 

 too small for the growing insect, and splits longitudinally ; 

 and in the early pupal state it may be seen attached along the 

 dorsal edges of the pupa-case. Margins somewhat thickened, 

 the adjacent tubes forming minute crenulations, and within it 

 the dorsum bears numbers of very small circular pores ; from 

 these and from the marginal tubes is produced a quantity of 

 white waxy matter, some of which covers the dorsum in 

 scattered patches, and the rest spreads out round the larva in 

 a very long fringe of delicate threads, frequently much longer 

 than the insect itself. This waxy matter is very brittle, and, 

 as a rule, the whole surface of a leaf is powdered over with 

 the fragments, making the leaf look as if mildewed. 



Pupa-case, in the earliest state, scarcely distinguishable 

 from the late larva ; afterwards, as the insect grows, it be- 

 comes much thicker. The form remains elliptical; the length 

 reaches about -^qIH. The dorsal disk is slightly convex, 

 flattened towards the margin ; it is larger than the ventral 

 disk, and slightly overlaps the sides, which are vertical. The 

 hollow thus formed is covered by a ring of thin white wax, 

 and there is also a plate of wax beneath the ventral surface ; 

 portions of this ring and of the plate are frequently seen 

 amongst the long threads of the larva. The pupal margin is 

 crenulated, but bears no fringe, and the dorsum has no pores 

 or wax. The outline of the enclosed pupa may be made out 

 indistinctly on the dorsum, and the rudimentary organs vent- 

 rally on turning over the case. Vasiform orifice subconical, 

 with regularly convex sides, the anterior edge concave ; oper- 

 culum subelliptical ; lingula very short, not extending beyond 

 the operculum. 



Adult form unknown. 



Hab. In India, on Bosa. My specimens were sent by Mr. 

 Cotes, late of the Indian Museum, Calcutta. They came from 

 Quetta, Beluchistan. I have named the species after him. 



The overlapping of the sides by the dorsal disk of A. cctesii 



