and the name common in England has come in popular phrase 

 to be loosely applied to the whole genus. 



There are many hundreds of species and varietal forms, 

 most of which occur in the tropics of the eastern and western 

 hemispheres. There are only three species found in all Europe; 

 there are about thirty found in the United States and Canada. 



GENUS PAPILIO LINN^US 



(THE SWALLOW-TAILS). 







This great genus has been subdivided for purposes of classi- 

 fication into a number of smaller groups or subgenera, which 

 are useful when dealing with the whole assemblage of species, 

 but which in a manual like this, dealing with only a few forms, 

 may consistently be overlooked. 



(1) Papilio ajax Linnaeus. Winter form walshi Edwards, 

 Plate CXII, cf; summer form marcellus Boisduval, Plate 

 CXIII, rf 1 (The Papaw Butterfly). 



The species is more or less polymorphic. Plate CXII repre- 

 sents the form which emerges in the spring of the year from 

 chrysalids which have overwintered; Plate CXIII shows the 

 form which appears in the second brood and in which the tails 



187 





