Some results of recent experiments in hybridising 

 Tephrosia bistortata and T. crepuscularia. 



Price 2/0 net. 



The detailed and tabulated results of crossing these species in considerable 

 numbers by Dr. Riding and Mr. Bacot, with conclusions bearing on the stability, 

 comparative antiquity and peculiarities exhibited by these species. 



The Drinking Habits of Butterflies and Moths. 



Price 1/6 net. 



A most fascinating and interesting summary of the observations made by 

 different authors on this subject in various parts of the world, its possible origin and 

 meaning, and its bearing on the habitat chosen by many species as well as on their 

 peculiar habits. 



The Nature of Metamorphosis. 



Price 1/6 net. 



A technical essay on the peculiar phenomena presented by metamorphosis in 

 the different orders of insects. The nature of metamorphosis. Its origin. Its value 

 in the struggle for existence to the species and race. 



The Scientific Aspect of Entomology. 



Parts I and II, 1/- each part, net. 



Discussions on the various methods to be pursued to obtain scientific results from 

 the study. The various lines of entomological work and other important factors are 

 considered in detail. 



Other Pamphlets obtainable are : 



Notes on Hybrids of Tephrosia bistortata and T. crepuscularia . . . . 1/- 



The Lasiocampids . . .. .. .. .. .. .. . .. 1/6 



A gregarious butterfly — Erebia iverine . . . . . . . . . . . . 1/- 



Catalogue of the Palsearctic Lachneides. Families, subfamilies, tribes, 



genera, species, varieties and aberrations .. .. .. 1/- 



Catalogue of the Palsearctic Dimorphides, Bombycides, Brahmseides and 

 Attacides. Families, subfamilies, tribes, genera, species, varieties 

 and aberrations . . . . . . . „ . . . . . . . . -/6 



Monograph of Peronea cristana and its aberrations. 



(With beautiful chromo-lithograph plates). 



By J. A. CLARK, F.E.S. 



Price 2/- net. 



This monograph must be in the hands of all students of the Tortricid moths. 

 It contains an account of the biology of the species, its literature, synonymy, copies of 

 the original descriptions of the type and all its 64 named aberrations wherever and 

 whenever described, besides descriptions of a large number of aberrations named, 

 described and figured here for the first time, of which no fewer than 26 new forms 

 are beautifully figured. 



