of Deilephila euphorbiae, which bears a stigma on the meso- 

 thorax as well as on the metathorax. 



A list of the illustrated works I consulted follows, the exact 

 titles are to be found in the bibliography; the date given refers 

 to the beginning of the publication. 



* Buckler 1886. 



SCUDDER 1888. 



HoFMANN 1893 see Spuler. 



* Packard 1895. 

 Beutenmuller 1900. 

 Forrester 1907. 

 TONGE 1907. 



* Spuler 1910. 



De Reaumur 1737. 

 Sepp 1762. 

 HCbner 1786. 

 Ratzeburq 1840. 

 duponchel 1849. 

 HoRSFiELD and Moore 1857. 

 *MlLLlfeRE 1858. 



Wilde 1861. 



In chapter VI I have given a systematic synopsis of the cater- 

 pillars which I have examined. Of those families, of which I had 

 no specimens at my disposal, I have given an account taken from 

 the literature on the subject. 



CHAPTER 11. 



Literature. 

 The studies by Weismann which I have mentioned before, were 

 made to prove the correctness of the ideas introduced by Darwin 

 on the transformation of the organisms. He had two reasons for 

 his choice of the pattern of caterpillars as a test-object for his 

 theoretical conceptions: 



1. because with them sexual selection is out of the question. 



2. because only the colouring of caterpillars was considered to 

 be of value for the life of their bearers and not the pattern, which 

 has nothing to do with the colour. 



For special reasons Weismann confined himself to the Sphin- 

 gidae. His terminology is as follows: 



1. Linea dorsalis, placed in the middle of the dorsum. 



2. Linea stigmalis or linea suprastigmalis and infrastigmalis. 



3. Linea subdorsalis, just between 1 and 2. 



