EXPLANATION OF THE PLATES. 



PLATE X. Synopsis of Nomenclature, 1886-1916. 



Fig. 1. Myscelia orsia (NympJialidae). Instar/, Immediately before moultiri!^. 



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



the secondary scoli. After W. Muller (1886, Taf. 3, fig. 14). 

 » 2 and 3. Acmea pellenea. Hübn. (Nymphalidae). Instar /. To show 



tlie primary setae on the metathorax and the 2nd and 3rd abdo- 



minal segments, after W. Muller (1886, Taf. 1, fig'. 1). 

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



three setae above the stignna. 

 » 5. The arrangement of verrucae is of the '-Arctian type", marked 



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

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



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

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

 V 8. Thoracic scheme after O. Hofmann (1898). The subprimary setae are 



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



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



and that of 1894 are given in Roman cyphers. 

 » 9 and 10. Melcmchria nutans. (Nociuidae). In.star 11. The setae on a 



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



(1904 6). Mark seta III B. 

 » 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 humiili. Metathorax and Ist abdominal segment of a 



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



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

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



sLibprimaries 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). 



