CONTENTS. 



Page. 

 Chapter I. Introduction, Material and Method 261. 



§ 1 Introduction 261. 



§ 2 Material and Method 263. 



Chaptei- II. Literature 266. 



Chapter III. On the Striicture of the Thoracic Segments 280. 



Chapter IV. On the Number of the Segments and on the Abdominal Legs. 287. 



Chapter V. Nomenciature and Primitive Pattern 290. 



Chapter VI. Systematic Synopsis of the Setal Pattern of Cateipillars . 307. 



(The following caterpillars are described in detail and 

 figured on Plate I — V). 



Hepialus hectus 310. 



Hepiahcs spec. cf lupullnus 312. 



Cossus cossus 317. 



Zeuzera pyrina 318. 



Pygaera bucephala 325. 



Lymantria dispar 331. 



Euproctis chrysorhoca 333. 



Orgyia antiqua 337. 



Lasiocampa rubi 343. 



Bombyx tnorl 345, 



Saturnia pavonia 351. 



Sphinx ligustri 354. 



Smerinthus tilaie 350. 



Smerinthus populi 357. 



Hypocrita jacobaea 359. 



Arctia caja 359 



Spilosoma lubricipeda 361. 



Nonagria nervosa 363. 



Mamestra brassicae 363. 



Acronycta psi 363. 



Thyris fenestrella 367. 



Pieris brassicae 371. 



Pieris napi 375. 



Vanessa urticae 379. 



Serlcinus telamon 381. 



