144 Indian Museum Notes. [Vol. IV» 



but it is most difficult to detect them. The ventral surface is 

 flat, brown ; the rudimentary organs are not distinct, owing to the 

 dark colour. 



Adult form unknown. 



Hab. — In India, on Saccharum officinale. My specimens were 

 sent by Mr. Cotes, late of the Indian Museum, Calcutta, from Baroda. 

 He informed me they were rather damaging to the sugar-cane in 

 those parts. 



The very elongated form is distinctive, besides the black colour. 



(2) Aleurodes eugenice, Maskell. var., aurantii. 



Larva very pale-yellow, sometimes almost white; form roundly 

 elliptical, flattish ; length about -^^ in. Dorsum striated, but the stria- 

 tions are very faint, except near the margin. Margin not at all 

 thickened, finely fluted and crenulated, bearing no hairs or fringe. 

 There are three small marginal depressions and three dorsal patches, 

 as in the pupa. 



Pupa-case very pale-yellow, roundly elliptical or sub-circular, 

 flattish and thin ; length about g-V inch, reaching sometimes as much as 

 ■^^ in. The enclosed pupa is only faintly discernible dorsally, rather 

 darker than the case, the abdominal segments moderately distinct ; on 

 turning over the case the rudimentary organs are less confused than 

 in A. eugenise. Dorsum of the case very finely marked with radiating 

 striae, which are a little more conspicuous near the margin. Margin 

 not thickened, almost entire, divided by deep narrow channels into 

 segments narrower than those of A. eugenise. There are three 

 marginal depressions, two opposite the rostrum and one at the 

 abdominal extremity, and three radiating patches terminating at 

 these depressions ; the patches end (as in the type) in crenulated 

 circular orifices, but are composed of great numbers of very minute 

 circular pores or dots, which do not form a lace-work pattern. Vasi- 

 form orifice subtrapezoidal or subelliptical, broader than long, oper- 

 culum nearly fitting the orifice ; lingula very short, cylindrical with 

 a dilated end, sometimes obsolete. 



Adult form unknown. 



Hab. — In India, on Citrus aurantium. Mr. Cotes, late of the 

 Indian Museum, Calcutta, sent me some orange-leaves from North- 

 West Himalayas thickly covered with this insect. 



I attach this as a variety to A. eugenise on account of the simi- 

 larity in several respects, notably in the dorsal radiating patches, 

 though it differs in some others. It has none of the marginal or 

 dorsal characters of A. citriy Riley and Howard. 



