828 THE BUrrEUFLIKS OF NEW ENGLAND. 



that tlie protective coloring arose from its habit of alighting here, while the 

 secondary habit of tihing the wings to heighten the iiiiniicrv arose pari 

 passu with the mottling. 



If all this be true, a knowledge of the out-dot)r life of our friends, lioth as 

 crawling worms and as winged sylphs, may be of tlie utmost aid in 

 attempts to note the interrelationships of nature ; and these as well as fea- 

 tures of actual structure must be accorded due weight in our classifications. 

 But neither should be divorced from its fellow, and if in the present work 

 I shall have done anything toward their proj)er combination and the just 

 valuation of the two I shall have succeeded in one of my aims. 



Table of species of Incisalia, based on the cgy. 



Cell walls coarse, obscuring and diminishing tlie cells niphon. 



Cell walls tine and clean cut, the cells well open irus. 



(Augustus not known.) 



Table of species, based on the caterpillar at birth. 



Body pale green, marked with yellowish brown niphon. 



Body very pale greeuish yellow Irus. 



(Augustus not known.) 



Table of species, based on the mature caterpillar. 



Body marked with lighter lines along the laterodorsal and substigmatal folds. 



The longitudinal lines white or whitish yellow, and so very distinct niphon. 



The longitudinal lines green, and so less distinct from the ground irus. 



No distinct longitudinal lilies (at least none mentioned by H.Edward.*) augustus. 



Table of species, based on the chrysalis. 



AbdonuMi heavily marked with black. 



Black markings of abdomen covering most of the surface above the spiracles niphon. 



Black markings of abdomen mostly conlined to a narrow stripe on either side irus. 



Abdomen with black markings only as small, rounded, disconnected spots on the .sides 



augustus. 



Table of species, based on the imago. 



Darker colors of the basal half of hind wings beneath distinctly limited on the inner side by 



a white or whitish edging niphon. 



Darker colors of basal half of hind wings beneath very indistinctly or not all limited within. 

 Ouler half of hind wings more or less besprhikled, especially near margin, witli pale lilac 



scales, giving it a hoary bloom irus. 



Outer halt of hind wings pretty uniform rust red, darkest next the margin augustus. 



