THE TRIBE OF THE YELLOWS 97 



Pacific Slope, ranging from Alaska southward, several of 

 them being especially abundant in the western mountain 

 regions. About eight species are recognized as belonging 

 to our fauna, some of which have several well-marked 

 varieties. 



Synopsis of the Orange-tips 



Falcate Orange-tip {Synchloe genutia, Anthocaris genutia 

 or Euchloe genutia). Expanse 1| inches. Tips of 

 front wings projecting in a hooked angle. Orange 

 blotch on upper surface near tip in male, absent in 

 female. 



Olympian Orange-tip (Synchloe olympia, Euchloe olympia 

 or Anthocaris olympia) . Expanse 1^ inches. Wings white 

 above in both sexes with greenish black markings at base 

 of all wings and along front margin of front wings, especially 

 at apex. No orange patch. 



THE TRIBE OF THE YELLOWS 



A large proportion of our most abundant and conspicu- 

 ous butterflies belong to the Tribe of the Yellows. Some- 

 times it is called the Tribe of the Red-horns because the 

 antennae of the living insects are so often red. These in- 

 sects vary in size from the large Brimstones or Cloudless 

 Sulphurs, expanding three inches, to the delicate little 

 Dainty Sulphur, expanding scarcely an inch. The dis- 

 tinctive characteristics of the tribe are found in the very 

 gradual enlargement of the joints of the antennae that 

 form the club, and the stout palpi, the last joints of each of 

 the latter being short. 



