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



joint 3, joint 5 short, only two-thirds length of joint 4 : joint 6 short, 

 little more than one-third length of joint 5 : joint 7 twice the length of 

 joint six. Vasiform orifice somewhat square, broader than long, poste- 

 rior edge widest, anterior edge flattisb, posterior edge slightly convex: 

 lateral edges flat and angled outwards. Margin of vasiform orifice slight- 

 ly tinged with brown : inner area semitransparent. Operculum flatfish, 

 broader than long : only about one-third length of vasiform orifice. An- 

 terior and posterior margins concave, lateral margins convex. The up- 

 per corners are the only parts of the operculum which touch the vasi- 

 form orifice. Colour brown. Lingula long, cylindrical, two jointed, 

 first joint shortest. The lingula projects nearly half its length beyond 

 the vasiform orifice. 



Adult male. Length *9 mm. Wing *85 mm. x *31 mm. Antennae 

 *25 mm. 



Long silky fluff on abdomen as in A. citri. This is only present in 

 recently emerged individuals. 



Aleurodes alcocki n. sp. Plate II, Figs. 1-9. 



Egg. Size "2 mm. X '1 mm. 



Colour light yellow brown. It stands upright on leaf to which it 

 is attached by a peduncle about "04 mm. in length. The egg is curved, 

 surface sculptured with minute hexagons. 



Larva 1st stage. Size "27 mm. x "16 mm. 



Shape elliptical, extremely narrow for its length. Provided with 

 antennas and legs. Colour whitish, semitransparent under the micro- 

 scope. Margin minutely crenulated. There is a series of closely appos- 

 ed marginal pores which secrete a short regular fringe of wax. Four 

 fairly long setae caudad on margin. Caudolaterally on margin eight ex- 

 tremely short setae (four a side) placed equidistant and forming a regu- 

 lar continuation of the four long caudal setae. Cephalad there are mar- 

 ginally twelve (six a side) setae which extend around the cephalothoracic 

 margin. Vasiform orifice slightly elevated, conical, apex pointing cau- 

 dad. Operculum semicircular, flat anteriorly, almost filling up vasiform 

 orifice. Colour brown, surface covered with fine hairs. Lingula extreme- 

 ly short, cylindrical, about half the length of the operculum beneath 

 which it is hidden. Legs stout ; tibiae of second and third pair of legs 

 furnished each with a long curved hair placed about the centre of the 

 joint. The tarsi of all the legs provided with a long hair just above 

 claw (or claws). Tarsi with apparently only one claw each. Antennae 

 •06 mm. (Formula 5, 6, 3, (1, 2, 4,) 7), long, seven jointed, covered with 

 fine hairs. 1st joint short : 2nd joiut short, stout, about the same length 

 as the first joint : 3rd joint thin, cylindrical, slightly longer than joint 

 two : 4th joint shorter than joint three, about the same length as joint 



