122 THE BUTTERFLIES OF NEW ENGLAND. 



Table of genera, based on the caterpillar at birth. 



Summit of licad regularly rounded, without tubercles ; appendages of body strongly bent. 



Appendages of the body very short, not one-half the length of the segments Oeneis. 



Appendages of body long, much longer than the segments Cercyonis. 



Each side of head surmounted by a rounded tubercle ; appendages of body straight. 



Appendages of anterior halt of body short, not one-third the length of the segments. 



Appendages of a few terminal segments no longer than the segments — Satyrodes. 

 Appendages of a few terminal segments twice as long as the segments... Neonympha. 

 Appendages of anterior half of the body long, nearly or quite as long as the segments. 



Head with slight conical coronal tubercles Enodia. 



Head with prominent globular coronal tubercles Cissia. 



Table of genera, based on the mature caterpillar. 



Body stout, not greatly constricted behind the entire head. 



JBody longitudinally and conspicuously striped with broken bands ; width of head about half 



the greatest width of the body Oeneis. 



Body longitudinally and inconspicuously striped with continuous bands ; head nearly as 



broad as greatest width of body Cercyonis. 



Body slender, tapering forward to form a distinctly constricted neck; head crowned with sum- 

 mit tubercles. 

 Summit tubercles of head large, conical, tapering, nearly as high as rest of head. 



Head stout and, including tubercles, half as high again as broad Enodia. 



Head slender and, including tubercles, twice as high as broad Satyrodes. 



Summit tubercles of head slight and inconspicuous (in New England species). 



Larger papillae of head distant and scattered Neonympha. 



Larger papillae of head closely crowded together Cissia. 



Table of genera, based on the chrysalis. 



Thorax regularly rounded ; head not prominent, its anterior and inferior surfaces not forming less 

 than a right angle. 



Cremaster abreviated, without booklets Oeneis. 



Cremaster normal Cercyonis. 



Thorax regularly rounded; head thrust forward, its anterior and inferior surfaces forming less 

 than a right angle. 



Abdomen destitute of longitudinal carinae. 



Front of head entire between the ocellar tubercles. 



Abdomen tapering rapidly, beyond the wing cases much shorter than they. Enodia. 

 Abdomen tapering gradually, beyond the wing cases as long as they ...Satyrodes. 



Front of head distinctly emarginate between the ocellar tubercles Neonympha. 



Abdomen with a pair of distinct longitudinal carinae Cissia. 



Table of genera, based on the imago. 



Antennae gradually incrassated on the apical third or fourth. 



Eyes naked Cercyonis. 



Eyes pilose. 



Spines of middle tibiae infrequent; antennae composed of more than forty joints 



Enodia. 

 Spines of middle tibiae very numerous; antennae composed of less than thirty-six 



joints Satyrodes. 



Antennae gradually incrassated from just beyond the middle. 



Costal nervure of fore wings scarcely tumid at the base ; hind wings consideraljly elon- 

 gated Oeneis. 



Costal nervure of fore wings very tumid at the base; hind wings well rounded. 



Antennae composed of less than forty joints ; outer border of hind wings more 



rounded than in fore wings Neonympha. 



Antennae composed of more than forty joints; outer border of fore and hind 

 wings similarly rounded Cissia. 



