86 H. W. Peal — Monograph of the Oriental Aleurodidse. [No. 3, 



are two pairs placed fairly close together on the lower edge of the mesio 

 dorsal ridge ; a pair of spines on each of the 3rd, 4th, and 5th abdom- 

 inal segments ; and two stout curved spines, one on each side of the vasi- 

 form orifice. There are two short seta3, one on each side of the vasiform 

 orifice and two fairly long setae caudad on margin. The vasiform orifice 

 as in preceding stages, but in some specimens the lingula appears large 

 and dumb-bell shaped. 



Larva 4th stage. Size 1'4 mm. x *9 mm. 



Shape elliptical, anterior edge abruptly conical. Colour dense black. 

 Mesio dorsal ridge as in preceding stages. A broad crenulated margin 

 which ends mesad in an elevated ridge which separates it from the rest of 

 the dorsum. The margin ends in a series of large closely apposed pores 

 ■which produce a short thick marginal fringe of white wax. The upper 

 surface of the margin is covered with a large number of minute pores 

 which produce a quantity of white fluff, which carving inwards covers 

 the dorsum. Segments of abdomen distinct. The dorsum is covered 

 with a large number of stout spines which lie : five pairs on the cephalic 

 region ; four pairs on the thoracic region, and five pairs on the abdominal 

 segments. There is also a stout curved pair situated one on each side 

 of the vasiform orifice. There are two short setae, one on each side of 

 the vasiform orifice and a slightly longer pair caudad on margin. Vasi- 

 form orifice large in proportion to its size as compared to the vasiform 

 orifice in the puparium. 



Puparium. Size 2'1 mm. x 1'4 mm. 



Shape elliptical, broadest caudad. Colour dense black. Distinct 

 mesio dorsal ridge which is narrow and sharp anteriorly, and broad and 

 rounded posteriorly. From this ridge there are a series of five ridges 

 which mark out the abdominal segments. Margin broad, crenulated ; 

 bearing on its upper surface a large number of minute pores which 

 produce a quantity of white wax filaments which curling inwards con- 

 ceal the dorsum. There are a series of closely apposed marginal pores 

 which produce a short but abundant horizontal secretion of wax. There 

 are ventrally on margin a series of pores which produce a small quantity 

 of wax. The dorsum is covered with a large number of short but stout 

 spines. These spines are grouped as follows. There are thirty hooked 

 spines forming a ring around the dorsum just within the margin. The 

 other spines are shorter and are situated as follows. A double row of 

 eight spines across the cephalic region ; four spines on the thoracic re- 

 gion; sixteen spines in a row down the mesio dorsal ridge on the abdom- 

 inal region ; two rows of three spines, one row on each side of the mesio 

 dorsal ridge on 1st and 2nd abdominal segments ; two rows of two spines 

 placed similarly on third and fourth segments and one spine on each 



