﻿Bui. 
  1 
  19, 
  Bureau 
  of 
  Entomology, 
  U. 
  S. 
  Dept. 
  of 
  Agriculture. 
  

  

  Plate 
  VII 
  

  

  Trap 
  Built 
  on 
  Top 
  of 
  Observation 
  Tower 
  to 
  Test 
  Aviation 
  of 
  Gipsy-Moth 
  

  

  Larv/e. 
  i'Original.) 
  

  

  