70 



TRANSFORMATIONS OF INSECTS. 



are so difficult to resolve into such shapes, except with very good 

 microscopes, handled by first-rate histologists — are dried drops of 

 some secretion which is upon the scale when the whole wing is 

 moist, immediately after metamorphosis. 



All the Lcpidoptcra, although the name implies to the contrary, 

 have not their wings perfectly covered with scales. The wings of 





r 



SCALES OF DIFFERENT GENERA OF LEriDOPTERA. 



I, 2. Papilio machaon. 3, 4. Morpho menelas. 5. Pamphila aracanthus. 6. 

 Sesia apiformis. 7. Zygsena filipenduite. 8, 9, 10. Sphinx ligustri. 11. Pterophorus 



pentadactylus. 



some are more or less transparent, and this is because they are 

 not covered with scales ; nevertheless these elegant structures are 

 to be found on the margins, upon the nervures, and on some parts 

 of the wings. They are never entirely deficient, and must be 

 looked upon in all the Lcpidoptcra as structures superadded during 

 the second metamorphosis. 



The legs of the Lcpidoptcra are almost always very slender in 

 proportion to the size and weight of the body. The adult insects. 



