156 PIONEA STRAMENTALIS. 



same ; these are separated by a spiracular stripe of 

 bright yellow; the head, the side margins of the neck- 

 plate, and the warty spots on the upper surface are 

 shining black ; on each side of the back are two very 

 fine and much interrupted series of white linear dots, 

 less broken on the second segment to the end of the 

 fourth than on the others ; the warty spots on the 

 ventral surface are of the ground colour, having dark 

 olive-brown centres. 



Directly after the third moult, and for a day or so, 

 the ground colour of the larva appears perfectly black, 

 which enhances the brilliancy of the broken white lines 

 and the yellow spiracular stripes ; but by degrees, after 

 it settles down to feed aofain and erow, the black skin 

 expands and the ground colour of the back becomes 

 more and more green until it is ag^ain of a blackish 

 olivaceous-green, when the length ranges from 13 to 

 16 mm. 



It now consumes a great quantity of food^ and the 

 plump skin begins to shine a little ; at the end of about 

 ten days it attains full growth, of an average length of 

 21 mm., and is thick in proportion, tapering a little 

 at each end, the anal legs extended behind in a line 

 with the body; the glossy black head has the upper 

 lip light green, edged at the mouth with black, the 

 papillae colourless, the side margins of the plate on the 

 second segment and the warty tubercles, each with a 

 hair, are black and glossy ; the upper series of broken 

 linear white dots commence rather wide apart on the 

 front margin of the second segment, and in their 

 course down the back form a base to the upper side 

 of each first pair of tubercles ; the lower series com- 

 mence on the third segment and are still more inter- 

 rupted ; the spiracular stripe of very bright and deep 

 yellow begins on the second segment and extends to 

 the thirteenth ; another narrower stripe begins on the 

 fifth and follows almost close below, of either pale 

 primrose-yellow or whitish ; the circular spiracles are 

 yellowish-brown with shining black centres ; the belly 



