1903.] H. W. Peal — Monograph of the Oriental Aleurodidx. 71 



larval stages being obtainable. Large quantities of the cast off skins 

 can however be obtained, which is rather unusual amongst these 

 insects. 



The insects are present on the leaves in colonies of from half a 

 dozen to several hundred individuals. The location of a colony can be 

 easily ascertained owing to the peculiarly whitened appearance of the 

 leaf wherever a colony has planted itself. This white is the meal from 

 off the adults. I observed no parasited pupae. 



Larva 1st stage. Size *2 mm. x '1 mm. 



Shape elliptical. Yellow pigment patch on centre of abdomen. A 

 fairly broad marginal fringe of wax. There are 26 spines on dorsum, 

 all around and some distance from the margin. Two series of pores 

 around the margin; difficult to make out but apparently as in later 

 stages. Two long setae caudad on margin. Two short setae caudola- 

 terally on margin. The vasiform orifice opens directly on the surface 

 of the dorsum. Shape cordate ; anterior edge flattish ; edge tinged 

 with yellow. Operculum yellow, similar in shape to the vasiform 

 orifice only narrower being broader than long. Anterior and posterior 

 margins flattish. The operculum extends only a little further than cen- 

 tre of vasiform orifice. Lingula short, broad, constricted in the middle 

 to form a flat broad basal end and a spatulate tip. About half the lin- 

 gula projects beyond the operculum. Colour of lingula brownish yel- 

 low. There appear to be no pores placed centrally on the abdominal 

 segments as in later stages. 



Larva 2nd stage. Size '65 mm. x '43 mm. 



Shape elliptical. A large brown patch on abdomen extending from 

 the first to the sixth segment. Area around vasiform orifice tinged with 

 brown. There are 26 setae around and slightly within the margin. 

 Caudad on margin 2 setae. Two shorter setae caudolaterally on mar- 

 gin. These 4 setae are placed on a lower plane than the marginal ring 

 of setae. There is a fairly broad marginal fringe of wax. There are 

 two marginal series of pores situated apparently as in pupa. Of the 

 central double row of abdominal pores present in the pupa only the 

 pair on the first and second segments present. There are rows of ex- 

 tremely minute pores on each segment of the abdomen placed centrally 

 and extending about one-third the width of the dorsum. These pores 

 tend to be disposed in rows but are very irregularly placed. The 

 fourth, fifth, and sixth segments have the largest number. 



Vasiform orifice placed in a depressed pit. The pit proportionately 

 far smaller than that in the pupa, the vasiform orifice nearly filling it. 

 Anterior and posterior edges of pit flat, sides convex. The lateral and 

 posterior edges slope inwards. The vasiform orifice situated in a clear 



