OrK CDMMOX JiUTTJlKILIIiS 



The most coiiinion vSiilpliur in the X()rthea>t has already l)een 

 ineiitioiiecl as beiiii;' soinetiiiies white. It is the Clouded vSiilphur and 

 may be distiiii^uished from the Little vSulphiir l)y the preseiiee of 

 silvery spots on the under surface of the hind \viny:s. Furthermore, 

 the former has a wing expanse of about two inches, while the latter is 

 rarel\' lari;er than one and a half inches. 



In completing; the list of common yellow butterflies we reach the 



Papilios or Swallowtails 



These are the giants of our northern day-fliers. The conspicuous 

 resemblance of their hind \vings to the "swallow-tails" of the sartorial 

 art and their large size distinguish them from all of our I^epidoptera 

 except the pale green night-flying Luna. The Papilio which is largely 

 yellow and has, among other black markings, three or four short black 

 bands on the front half of each front wdng is the Tiger Swallowtail. In 

 a rare form of the female of this species the ^^ellow is replaced by soot}' 

 brown except for the marginal spots. 



THE DARK FORM OF THE TIGER SWALLOWTAIL 

 II 



