CONTENTS. 
Small intestine .. a 
Colon and rectum es wa #e 
Length of the alimentary canal .. ve 
REPRODUCTIVE SYSTEM : 
1x 
Page 
oe os 168 
-- 169 
170 
Correspondence of the structure of the organs in the two 
sexes .. oé ee eis oe 
Male organs: 
General structure and relations 
Mode of dissection .. “ ee 
Female organs : 
Mode of dissection 
Uterus or oviduct and its PRN 
Ovaries : a 
Compared with those of the estes ee 
Ovaries of the workers Je ws 
Sting: 
An attribute of the female sex 
Mode of preparation o. 
Structure in detail ;—darbs, stead 
Poison-bag and poison .. 
Muscular bulb . 34 oe 
Caudal palpi, their probable hadton: es 
172 
172 
174 
er nery (ALO 
ee oo RUB 
vs Son See 
ee at LFS 
vs 178 
ax, See 
sls »- 180 
ee oo "280 
181 
182 
183 
Cuaprer VII.—FORM AND MODE OF CONSTRUCTION OF 
THE NEST. 
The Architecture typical of the species .. oe 
Beginning of the nest ee <a ois 
Its progressive enlargement 
Mode of collecting the materials .. 
Construction of the outer case... ie - 
Observed by marking wasps’ «4. 
Interior arrangements ee e a os 
Extension of the combs... oe ew 
Mode of construction of the cells .. hia 
Theoretical explanation of their hexagonal tier . a 
Direction of the cells ‘i ses oe rv 
Upper surface of the comb .. ee * e 
ve .» 185 
es -. 186 
ve .. 189 
ee val EOE 
193 . 
ae -. 194 
e- ¢ai2 196 
«. 196 
.. 198 
»» 200 
«- 202 
202 
