Explanation of Plate XXXVI. 
Fig. 1. Prothoracic plate of C. avis in last instar x 150, or rather 
of the central chitinised portion of it, the ends which are here like 
the rest of the skin in texture, witli the special angular hairs, are 
outside the figure. 
Fig. 2. Honey-gland area of C. avis in third instar x 100. 
