1903.] H. W. Peal — Monograph of the Oriental Aleurodidse. 75 



two : 5th joint extremely long, four times the length of joint four: 6th 

 joint short, one and a half times length of joint four: 7th joint extremely 

 thin and short, ahout one-fourth the length of joint six. It is extremely 

 difficult to make out the different joints distinctly, but there is no doubt 

 that joint 5 consists of only a single joint. Eyes maroon coloured. 

 There are several rows of minute pores on the abdomen there being two 

 rows on each abdominal segment. In the figure the artist has repre- 

 sented the vasiform orifice as seen ventrally by him through the trans- 

 parent body. 



Larva 2nd stage. Size *7 mm. x *37 mm. 



Margin slightly incurved on- sides of cephalothorax and at caudal 

 margin. Colour yellow, almost transparent when seen under the micro- 

 scope. Yellow, pigment patch in ceutre of anterior abdominal segments. 

 Eyes maroon coloured. Dorsum slightly elevated. The margin is un- 

 usually broad. The abdominal segments clearly discernible on elevated 

 portion of dorsum. There is a narrow ridge running from thorax ce- 

 phalid to the margin where it sometimes projects to a slight point. A 

 series of closely apposed marginal wax tubes which secrete a very frag- 

 mentary fringe. Crenulations of marginal pores distinct right up to 

 edge of elevated portion of dorsum. Edge of margin thickened some- 

 what, brown in colour. Marginal pores on incurved thoracic and caudal 

 margins slightly larger than the rest. Two fairly long setee on caudal 

 margin, and a pair placed caudolaterally, slightly anterior to these and 

 in line with the lower edge of the vasiform orifice. Vasiform orifice 

 oval, anterior margin flattish. Edge of orifice tinged with brown. Oper- 

 culum broader than long, of the same shape as the vasiform orifice. The 

 anterior margin flat so that it only touches the rim of the vasiform orifice 

 at the outer edges. Its lower edge extends some distance beyond centre 

 of vasiform orifice. The free (lower) margin slightly elevated. Sur- 

 face of operculum covered with fine hairs. Lingula short, cylindrical, 

 difficult to make out as it is shorter than the operculum beneath which 

 it lies. 



Larva 3rd stage. Size '85 mm. x '5 mm. 



Shape elliptical, narrower cephalad. Colour yellow : a bright 

 yellow pigment spot on centre of anterior abdominal segments. Brown 

 medio-dorsal ridge running from the thorax cephalad to margin. At 

 thorax a dark brown bar crosses the median dorsal ridge at right an- 

 gles. Posterior to this is another line which is angled caudolaterally, 

 then back again cephalolaterally. Thorax suffused with light brown, 

 with a deeply trilobed brown line on each side of mediodorsal ridge 

 demarcating the outlines of the developing insect within. Abdominal 

 segments distinct. Edge of margin set with closely apposed poises 



