﻿PLATE 
  I. 
  

  

  Fig. 
  1. 
  Face 
  of 
  locust, 
  showing 
  distribution 
  of 
  air-sacs; 
  oe, 
  ocular 
  dilated 
  sacs; 
  ct, 
  

  

  cephalic 
  trachea. 
  

   Fig. 
  2. 
  Upper 
  side 
  of 
  head 
  of 
  locust; 
  oc, 
  outer 
  ocular 
  sac; 
  ioc, 
  inner 
  ocular 
  sac; 
  c7, 
  

  

  clypeal 
  trachea. 
  

   Fig. 
  3. 
  Main 
  ventral 
  air-tubes 
  of 
  abdomen. 
  

   Fig. 
  4. 
  Distribution 
  of 
  air-tubes 
  in 
  hind 
  leg. 
  

  

  