EXPLANATION OF PLATE 45. 



Wing patches and folds found in male butterflies. 



From pencil drawings by J, H. Emerton. Reproduced photographically by the gelatine process by the Boston 

 Photogravure Co. 



1. Erynnis sassaeus ^. (the margin itself at the right), with the fold 



2. Thanaos hrizo Y- Cross section of the cos- opened to expose the androconia. 



tal fold, involving tvro veins. 5. Laertias philenor ^. The same, showing a 



3. Thanaos brizo Y- The same fold opened, the cross section, with the inner flap of the fold turned 

 costal edge uppermost. back to Its usual position ; the inner edge of the 



4. Laertias philenor ^. A piece from the inner wing is at the left, above, 

 margin of the upper surface of the left hind wing G. TJiymelicus aetna ^. 



