1905.] 155 



marking out the positions of the tubercles by obvious black dots. The crochets, 

 instead of pale brown, as before, are now black and conspicuous, 16 on ventral, 

 and 19 on anal prolegs. 



In the 4th instar (half grown) the length is 10 mm., the head pale rufous, 

 0'8 mm. wide, tubercles well marked by black dots, the base of hair and adjacent 

 margin of plate both black, i. e., each margin of the membrane forming the articu- 

 lation. The anal comb now presents 7 points, the marginal ones small, in this and 

 the previous skin the end of each prong of the comb is seen to be bifid, crochets 

 black, the legs brown, with margins of basal chitinous pieces black. 



Dec. 29th. — Most forward larva in last (feeding) instar. 



In the 5th instar the larva is much the same as in 4th, 

 tubercles not perhaps so conspicuous, its general appearance and tone 

 depend much on the intestinal contents ; the head is about 1'20 mm. 

 wide. 



The full grown larva is very like that of some of our common 

 Tortrices, being green, tapering to each end, a little flattened. The 

 skin really colourless, or nearly so, with skin points dark, but a darker 

 or lighter green showing through, according to contents of larva, *'. e., 

 amount of fat-bodies, and colour and amount of intestinal contents. 

 The head is very light brown, darker than straw colour, but not 

 black, as Milliere says, nor is the plate of prothorax, which is little 

 differentiated in colour from the rest of the larva, the spiracles are 

 hardly visible black circles. Otherwise Milliere's description is 

 correct. 



Larva, last skin not quite full grown. Length, 20 mm. — 24 mm. 



Colour, light bluish-green, with a darker tint on the back down to just below 

 the spiracles, just as if it had a light sepia wash over it, probably due to the minute 

 black skin points. 



The lines of folds between the subsegments look dark, where of course the skin 

 points would be massed together. Tapers slightly forwards through the thoracic 

 segments, and more definitely backward from about the fifth abdominal. 



Width about 2-5 mm., tapering to 2 mm. at prothorax and 1"5 or 19 mm. at 

 head, and about 1'9 mm. at ninth abdominal segment. 



Head, very light oak-brown, with a very small dark line laterally not reaching 

 forward to the eyes. Width, 2*0 mm. 



Eyes five on a black semicircle. 



Ends of jaws deep brown. 



There are very indistinct slightly darker markings on the head. 



Prothoracic plate green like the rest of the larva. 



True legs green, with a few darker markings on articulations along the margins. 



Ends of the last joints and the claws brownish. 



Subsegmentation. Thorax, 2nd and 3rd, a large central subsegment carrying 

 the tubercles narrowed at the dorsal line, with a spindle-shaped one widest, dorsally, 

 in front and behind this, these end in a point laterally about spiracular level ; a 

 very narrow one again in front and behind these. 



