LEPIDOPTERA 267 



The falcate orange-tip, Anthocharis genutia. — In this species the apex 

 of the fore wings is hooked, reminding one of the hook-tip moths. In 

 the males there is a large apical patch. This butterfly is found through- 

 out the southeastern part of the United States, not including Florida. 

 It occurs as far north as New Haven, Conn. It is nowhere abundant. 

 The larva feeds on rock-cress, bitter cress, shepherd's purse, Sisymbrium, 

 and other Cruciferas that are slender in form. 



The olympia orange-tip, Synchlce olympia. — In this species the 

 orange patch is wanting in both sexes. There is a conspicuous black bar 

 at the end of the discal cell of the fore wings, and the apical portion of 

 these wings is gray including a large irregular white band. 



The larva is striped lengthwise with pale slate color and bright yellow; 

 the feet, legs, and head are grayish-green. It feeds on hedge-mustard 

 and other Cruciferse. 



THE YELLOWS 



The yellows are easily recognized by their bright yellow colors, al- 

 though in some species whitish forms occur. They abound almost every- 

 where in open fields, and are common about wet places in roads. To this 

 group belong the larger number of our 

 pierids. 



The roadside butterfly or the clouded 

 sulphur, Eurymus philodice. — The wings 

 above are rather pale greenish-yellow, with 

 the outer borders blackish -brown. Figure 

 464 represents the male; in the female the 

 border on the fore wings is broader, and 

 contains a sub-marginal row of yellow 

 spots. The discal dot of the fore wings is 



, , « , , r 11 1-1 • • Fig. 464. — Eurymus plnloaue. 



black, that of the hmd wings is orange. 

 The under surface is sulphur-yellow. 



This species is dimorphic. The second form is represented only by 

 the female sex, and differs, in having the ground-color of the wings white 

 instead of yellow. 



This butterfly often occurs in large numbers in muddy places in 

 country roads, for this reason it may be known as the roadside butterfly. 

 It is also known as the clouded sulphur. Its range extends from the 

 mouth of the St. Lawrence to South Carolina and westward to the Rocky 

 Mountains. Its larva feeds upon clover and other Leguminosae. 



The orange sulphur, Eurymus eurytheme. — This species closely re- 

 sembles the preceding one in size, shape and markings. The typical form 

 differs from E. philodice in being of an orange color above instead of 

 yellow. This butterfly is found chiefly in the Mississippi Valley and west 

 to the Pacific Ocean; it is also found in the Southwestern States, and 

 occurs very rarely north to Maine. It is one of the most polymorphic 

 of all butterflies; the forms differ so much in appearance that four or 

 five of them have been described as distinct species. The larva feeds on 

 clover and allied plants, and is sometimes a pest in alfalfa fields. 



The dog's head, Zerene ccesonia. — The wings are lemon-yellow above 

 bordered on the outer margin with black. On the hind wings the border 

 is narrow, but on the fore wings it is broad. The outline of the yellow of 



