xiv CONTENTS 



CHAPTER XXXIII 



Page 



The Hymenoptera. 338 



General description and structure — Terebrantia and Aculeata — -Develop- 

 ment — Distinctive characters — Importance — Tenthredinoidea — Currant 

 Worm — Pear Slug — Wheat Stem Borers — Horn-tails — Ichneumonoidea — 

 Their importance — Methods of work — Long-tailed Thalessa — Cynipoidea — 

 Gall production — Alternation of generations — Inquilines — -Parasites — Impor- 

 tance of galls — Chalcidoidea — Habits — Wheat Straw Worm — Wheat Joint 

 worm — Clover-seed Chalcis — Fig Blastophaga — Pteromalus puparum — 

 Serphoidea — Long-tailed Pelecinus — Variation in habits of parasitic Hymen- 

 optera — -Chrysidoidea — Sphecoidea — Vespoidea — Progressive development 

 as illustrated by Wasps — Apoidea — Solitary bees — Leaf-cutter bees — 

 Carpenter bees — Bumble bees — Honey bee — Life of a Honey bee colony — 

 Swarming — Value of bee products — Formicoidea — Composition of ant 

 colonies — ^Location of colonies — Swarming — -Establishment of new colonies — 

 Ants and plant lice, etc. — Unusual habits — Argentine Ant — House Ants- 

 Ants in lawns. 



