EXPLANATION OF THE PLATES. 



PLATE I. Synopsis of Nomenclature, 1886-1916. 



Fig. 1. Myacelia orsit (Nymphalidae). Instar /, Immediately before rooultin^. 

 To show the arrangements of the primary setae and the place of 

 the secondary scoli. After W. MCller (1886, Taf. 3, Hg. 14). 



» 2 and 3. Acraea pellenea. HObn. (Nymphalidae). Instar /. To show 

 the prinoary setae on the metathorax and the 2nd and 3rd abdo- 

 minal aegmenU, after W. MtlLLER (188C, Taf. 1, flg. 1). 



» 4. Hepialus lupulinus, after H. G. Dyar (1894, p. 197). Observe the 

 three setae above the stigma. 



» 5. The arrangement of vomicae is of the "Arctian type", marked 

 according to H. G. Dvar's system (1894, p. 198). 



» 6. An abdominal segment of a Psychid larva. Adapted from a figure 

 by H. G. DvAR (1884, p. 198). Observe the three setae above the stigma. 



» 7. Thoracic scheme, marked according to Dyar's system (1894 b). 



t 8. Thoracic scheme after 0. ElomiNN (1898). The subprimary setae are 

 marked with an asterisk. H. G. Dyar himself agreed with this 

 system in 1901. The difTerences between his opinion at this date 

 and that of 1894 are given in Roman cyphers. 



» 9 and 10. Melanchria nutans. (Noctuidae). Instar 11. The setae on a 

 metathoracic and an abdominal segment, after the ideas of A. Quail 

 (1904 b). Mark seta III H. 



» 11 and 12. Metathorax and abdomen with primary setae, according to 

 the system of W. T. M. Forbes (1910), cited by St. B. Fracker (1915). 



» 13. Pieris brassicae L. Instar V. The rows of pigment-spots, with the 

 names given by J. F. van Bemmelen (1913, p. 115). 



» 14. Hepialus humuli. Metathorax and 1st abdominal segment of a 

 mature larva. Adapted from a figure by Y. H. Tsou (1914, Pi. X, 

 fig. 1 c, rf)- Compare figure 4, 22, 23, 24. 25 of this plate. 



» 15. Hypothetical type showing twelve primary setae. The three usual 

 subpriraaries are dotted in. The spiracle is shown in both protho- 

 racic (thor.) and abdominal (abd.) positions. After St. B. Fracker 

 (1915, PI. I, fig. 1). 



