258 Mr. F. Muir's Notes on the Tessaratoma papillosa. 
situated at the juncture of the duct and reservoirs. It is 
by the sudden contraction of the walls of these chambers, 
when full of fluid, that the insect is enabled to eject its 
obnoxious fluid six to ten inches. Fig. 3 shows the position 
of gland and the section gives a diagram of reservoir. 
EXPLANATION OF PLATE XXIII. 
[See Explanation facing the PLATE. ] 
