both above and below, the black band along the interior margin small and 

 very faint. Fxpands 1% to 1% inches. Gulf States. 



T. Jucunda, B'dvl. Very close to the above but can be easily distingu- 

 ished by being white on the underside of secondaries, and having no pink oil 

 underside of primaries. Expands \% to 1% inches. Grulf States. 



We are inclined to consider Delia and Jucunda as forms of the same spe- 

 cies, the difference consisting only in the presence or absence of the pink 

 shadings on the underside. We have the same difference in el. >sely alli'-d sj ie- 

 cies, T. Nicippe and T. Mexicana, and it is especially striking in varieties of 

 Colias Cpesonia. 



T. Westwoodi. B'dvl. Male ; upperside chrome yellow, borders black ; 

 underside of primaries yellow, immaculate, of secondaries yellow, a black 

 point near base, and two discoidal points of same color ; across the disk a mac- 

 ular band, irregular, of brown atoms. Female ; paler than male, with an 

 orange tint along the hind margins of secondaries ; the borders of primaries 

 brownish, broader than in $ ; underside as in S except that the apex of each 

 wing has a patch of red ferruginous. Expands same as Nicippe. Texas. 



T. Nicippe, Oram. Male ; upperside bright orange, with broad black 

 borders, broader on secondaries ; discal spot on primaries black ; underside 

 pale orange, secondaries more or less strongly marked with ferruginous. 

 Female ; paler, borders broader, but more suffused ; underside same as male. 

 Expands 1% to 2 inches. New York to Grulf ; Mississippi Valley. Arizona. 

 6 and 9 yellow variety. 



T. Proterpia, Fab. Male ; upperside bright orange, veins black and a 

 slight border of pale brown, outer edge of secondaries angular in the middle ; 

 a broad black costal band on primaries ; underside of primaries pale orange. 

 of secondaries yellow. Female ; uniform pale orange ; the border on prima- 

 ries is much like Nicippe, but extends further along the costa ; border of 

 secondaries black but slight ; underside same as male. Expands 1% to 2 in- 

 ches. Texas. 



T. Mexicana, Bdvl. Male ; upperside pale yellow ; primaries with a 

 broad black border on outer margin, interrupted near the middle by the 

 ground color ; secondaries, the middle of the exterior edge prolonged to a 

 prominent angle, in the form of a tail ; a slight border of black not reaching 

 the internal angle ; costal edge powdered with bright yellow ; underside of 

 primaries pale yellow, of secondaries yellow sprinkled with ferruginous, a 

 transverse band' of ferruginous. Female ; same as male, but paler ; the den- 

 tation in the black border of primaries more quadrangular. Expands 1% to 

 1% inches. Texas to Arizona, California, Nebraska. 



