REPORT OF THE SOCIETY 119 



weil-defiried vertical streak of dark grey, the anterior portion with 

 darker horizontal dashes. This is followed by a second lead blue streak. 

 The outer margih is bordered by a dark grey band; the scales fringing it are 

 chiefly dark grey, but a few are lead blue. The under side of the fore wings 

 is ash grey, spotted white along the costal border. The hind wings are ash 

 grey above and below and uniform in colour. The abdomen also is ash 

 grey; in the male slender bearing a small tuft of scales at the anal extremity. 



Egg. — The egg" is broadly oval, sometimes almost circular, M mm. x 

 .7 mm. (1/28 in. x 1 '36 in.) It consists of a narrow flattened outer edge, a 

 portion of the chorion or egg shell, closely appressed to the leaf, and within 

 this a somewhat raised central area containing the yolk. The freshly laid 

 egg is transparent and iridescent closely resembling "a minute drop of water 

 or a fish scale." As it grows older it may become somewhat opaque and in 

 the later stages of development it becomes yellow and more distinctly visible. 



Larva. First stage. — The newly hatched larva is light green in colour 

 and measures 1.03 mm. (1 24 inch). The head is .228 mm. wide, its colour 

 smoky brown sometimes tinged w'ith purple. The clypeus, labrum and 

 mandibles are reddish brown, the V-shaped epicranial suture is distinctly 

 marked but the lighter coloured lines parallel to it in the older larvae are 

 absent at this stage. The prothorax is as wide as the head, its shield smoky 

 brown but somewhat lighter in colour than the head. The second and third 

 thoracic segments are narrower than the first and are greenish white in 

 colour. The abdominal segments, except the anal, are uniform in width 

 measuring about .18mm. and concolorous with the two hinder segments of 

 the thorax. The terminal segment of the abdomen often appears brown 

 because of the brown excrement in the rectum. 



Under a microscope the setae can be made out. They are light brown 

 and have the same general arrangement as in the older larvae. The setiger- 

 ous tubercles' have the colour of the segments on which they are borne and 

 are very indistinct. 



Intermediate Stages. — As the insect feeds the width of the body increases, 

 and in two or three days the abdomen is wider than the head. By the third 

 day the body begins to assume a brown colour which gradually deepens. 

 The head and thoracic shield grow darker and the setigerous tubercles 

 become more distinct. The light median line of the pronotum appears 

 after the third moult, and the light V-shaped lines of the epicranium after 

 the fourth. 



Last Stage. — The full-grown larva is 12 mm. (^ inch) in length. The 

 head is dark brown to black and shiny, sparsely clothed with light 



