PATTERNS CONSPICUOUS IN NATURE. 



413 



togethei' and migrate in immense swarms. Salatura was intro- 

 duced into this table because it shows a considerable resemblance 

 to the next type to be considered. The bands of dark tone 

 crowning the central light area have been drawn too boldly and 

 of too dark a tone, which makes the resemblance closer than it 

 xeally is. 



Text- figure 18. 



'Tj'pes of all the genera illustrated in ' Lepidoptera Indica ' wlncli present patterns 

 of the second tj'pe undea' consideration. 



1. Farliestina. 2. Pnrantica. 3. Orinoma. 4. Caduffa. 5. Penthema. 6. Par- 

 anticopsis. 7. Delias. 8. Calinaga. 9. Cadugoides. 10. Caduga. 11. 

 Neurosigma. 12. Metapnria. 13. Hestina. 14. Kadena. 15. Prioneris. 

 16. Salio'i'a. 



Examples of the second type of pattern which must render 

 the insect conspicuous in oSTature are shown in text-fig. 18. It 

 can be seen that the insects present an uninterrupted margin, 

 the pattern nowhere reaching the margin, and that at the 

 margins there is an area of dark tone, whilst the centre of the 

 wings is much lighter in tone. As before, there is no scalloping 

 ■or irregularity of the margin. It follows that this pattern 



