CALLIDRYAS. 25 



under side, at least in tlie females, one or two silvery or ferruginous 

 j)i)ints. They are distinguished from Colias and RJiodoceras by 

 the absence of the rough costal edge of the primaries of the males, 

 of the prominent angles, and by the form of the antennae. The 

 sexual difference is very striking, and this has led some v/riters to 

 describe the two sexes as different species. 



1. C. eufcule Linn. Figured in Boisd. Spec. Gen. pi. 2, B. fig. 6. Cram. 

 120. A. B. 163. A. B. C. Boisd. et Lee. 74, pi. 24. Sm. Abb. I, pi. 

 5. C. marcellina Cram. 



Boisd. in Boisd. et Lee. p. 15, following the example of the old 

 authors, confounded this species vi\{\\ C. marcellina, making the 

 latter the male; but a subsequent comparison of the larvce con- 

 vinced him of his error. 



3Iale Upper side yellov.' citron, with a thin indistinct border 



of yellow, more dull and dentated on the primaries; the fringe of 

 all the wings is marked by distant ferruginous small points. 



Under side more deeply yellow ; primaries, with two ferruginous, 

 geminate points at the end of the discoidal cellule, follovv'ed by a 

 transverse, brownish, zigzag ray. 



JJnder side of secondaries, with two discoidal, silvery points, 

 circled with ferruginous, situated on a sinuous, brownish line, pre- 

 ceded by red ferruginous points, more or less distinct, and followed 

 by a tortuous, brownish, indistinct line. 



Female, or O. euhule of authors, of a more vivid yellow; se- 

 condaries rounded, fringe orange, interrupted by transverse brown 

 lines or spots. Primaries, with a large brown spot on the middle, 

 cut by an orange arc ; border narrow, brown, crenulate, preceded 

 towards the summit by a tortuous, blackish, indistinct ray. 



Under side more intensely yellow than the male, with the same 

 markings more prominent and more ferruginous ; the primaries 

 have two discoidal, united silvery points ; the secondaries have a 

 part of the points of the base united in a tortuous line, so that they 

 have three tortuous, transverse rays, of which the middle one is 

 joined with that of the primaries. 



Body yellowish, with greenish hairs on the thorax ; antennae, 

 and under side of the last article of the pal[)i, rose brown. Ex- 

 pands about two and three quarter inches. 



Florida. 



Boisd. 



