Explanation of Plate XXVII. 



Figs. 1-0. Various aspects and colourings of larvae of .4. thersifes 

 in last stage. 

 ,, 7, 8. Larva when quite full fed and ready to seek a jilaee for 

 pupation, the " slope" becomes as if smoothed down 

 to a level surface, cut into by the incisions and with 

 a hollow of somewhat figure-of-8 form on each 

 segment. 



The figures in PI. XXVI and XXVII are much enlarged, but 

 nearly the same in each case, about 4 or 5 diameters or (in the 

 younger larvae) rather more. 



