318 THE BUTTERFLIES OF NEW ENGLAND. 



BIBLIOGRAPHY. 



Darwin, C. The descent of man, and selection in relation to sex. London, 2 vol., 187L 



(Cf. chap, xi.) 

 Scudder, S. H. Antij^eny, or sexnal diniorpliisni in Imtterflies. Boston, 1877 (Proc. 



Araer. acad.). 



Table of species of Polijr/onia, based on tlie egg. 



Egg more than a fourtli liigher than broad interrogationis. 



Egg less than a fourth higher tluin broad. 



Egg of equal height and breadtli faunus. 



Egg about one-fifth higher than broad. 



Vertical ribs eleven in nuniljer comma. 



Vertical ribs ten or less in number progne. 



(Gracilis and satyrus not seen). 



'Table of species, based on the caterpillar at birth. 



Papillae of body dark but not blacl<. 



Papillae brownish fuscous interrogationis. 



Papillae dark green faunus. 



Papillae of body black. 



Body varying from pale straw to dark green, the anterior margin of the segments livid 



comma. 



Body grass green, the anterior margin of the segments very pale green progne. 



(Gracilis and satyrus not seen). 



Table of species, based on the mature caterpillar. 



Upper surface uniformly variegated throughout. 



Lateral spinules emitted from below the middle of the coronal head-spines, interrogationis. 

 Lateral spinules emitted from the middle of the coronal spines. 



Coronal spines stout, the lateral spinules coarse and about as long as the central spine 



beyond the circlet comma. 



Coronal spines slender, the lateral spinules slender but not so long as the central spine 



beyond the circlet progne. 



Dorsum of most of the abdominal segments white, in striking contrast to the sides. 



White dorsal patch extending over all the abdominal and some of the thoracic segments. . 



satyrus. 

 White dorsal patch not extending in advance of the second abdominal segment. ..faunus. 



(Gracilis not seen). 



Table of species, based on the chrt/salis. 



Ocellar prominences conical throughout; laterodorsal tubercles of fourth abdominal segment 

 strikingly larger than the others. 

 Mesonotal tubercle quadrate. 



Laterodorsal tubercles of fifth to seventh abdominal segments subcqual 



interrogationis. 

 Laterodorsal tubercles of fifth to seventh abdominal segments decreasing in size regu- 

 larly and considerably satyrus. 



Mesonotal tubercle triangular comma. 



■Ocellar prominences equal on basal half ; laterodorsal tubercles of fourth abdominal segment 

 not very much larger than the others. 



Notch between ocellar prominences deeper than broad faunus. 



Notch between ocellar prominences broader than deep progne. 



(Gracilis not seen). 



