x CONTENTS. 
Wasp-paper: 
Its nature .. a a ee os ee ee ee 
The material adapted tothe climate .. oe we ee 
Influence of season and position on the mode of construction 
Limits to the extension .. oe + ee oe 
And duration of the nest .. as oe ee ee 
Specific distinctions of the several nests : 
V. Crabro, Plates VI, VII + <a oa ru 
Ground-nests : 
V. vulgaris, Plate VIII .. ai Si a va 
V. germanica, Plate IX st ee sa a) oe 
V. rufa, Plate X of es ee es es 
Tree-nests : 
V. britannica, Plates V (?), XI, XIII, XIV ats F 
V. sylvestris, Plates VI, XII ib sie By «a 
V. arborea, unknown .. oe oi ais wa Se 
Cuapter VIIT.—SOCIAL ECONOMY. 
Commencement of the colony, oviposition és ee ee 
First larval period to first moulting ve ee es ve 
Second larval period ; movement to the end of the cell.. : 
Organs of larval locomotion ee ve os aw ee 
Structure of the caudal sucker .. o% oe es ‘0 
Mechanism of the larval movements as ee ee 
Formation of the cocoon .. a ad - oe oe 
Second moulting .. ee ee se ee ve oe 
Exuvie of the larva - ses * ee os és oe 
History of the larva of the honey-bee : 
Difficulties of the inquiry .. os ee + oe 
Nature of the deposit in the cell .. a’ ‘e es 
The cocoon, its structure ‘Ne ae ws “s és 
And contents .. 0 ee . oe 
Identity of the history of the sans and wasp- larva.. ee 
Evolution of the perfect wasp .. vs we we sls 
Contents of the deserted cell oe oe ee _ “« 
Its re-occupation .. ‘eo ** oe se ee oe 
Length of the period of development of wasps .. - ve 
Difficulties of observations on larval wasps —«.y ve a 
