COLIAS. By J. Bobcr. 91 



on the hindwing, the median spots of the under surface are smaller, as also those of the upper surface, the latter 



often absent. The ? is above yellowish white with only narrow, proximally diffuse dark margin to the forewing. — lahrado- ^4>/f 



labradorensis Scudder can scarcely be distinguished. The cj has narrower distal margin, which is almost broken rensis. 



up into spots by small stripes of the ground-colour, and the $ has no dark distal margin, ab. moeschleri Gr.- moesclilcri. ^^^ 



Grsh. is darker yellow, almost orange-yellow. — In Dr. St audinger's collection there are specimens which might 



be treated as hybrids of peJidne and nastes: upper surface greenish j^ellow, veins black-brown, the dark margin 



sharp. This form may be named standfussi. — felidne is not a constant form, but on the other hand does not standfussi. :fK^ 



vary very much, so that no positive characteristics can be given for skinneri Barnes. — Chippewa Edw., from skinneri.^/7 



the Mackenzie Eiver (British North America), appears to be a transition between felidne and palaeno; Steecker '^ ^Ppeua.ffO 



considers it a form of palaeno; it is an aberration very difficult to differentiate. The $ is more like a $ of palaeno 



than of pelidne. 



C. philodice Godt. {= dorippe Godt., palaeno Cr., europome Steph.) (^Ta) (the Common Sulphur or Puddle philodice. ^^' 

 Butterfly), is distributed from New England to Florida and westwards to the Rocky Mountains. This species is very 

 common and often occurs in swarms, enlivening the edges of the roads and clover fields. It only varies a little in ^.f^ 



the width of the black margin. White $$ are distinguished as ab. 2\\s2iSigr. i. I. — ab. anthyak Hbn. is a form with '^nthiiah' ^^^ 

 narrow dark margins. — In Guatemala occurs guatemalena Stgr. i. I., a deeper yellow form with somewhat guatemalma /jT 

 broader dark margin to the upper surface. The under surface is somewhat more strongly dark-marked. — • 

 Egg light yellow to red, iridescent. Larva slender, green, with light green longitudinal stripes; lives on clover. 

 Pupa light green. 



C. chrysomelas Hij. Edw. ('27a, b), from the coast districts of North California, is larger and in the chnjsomcla.s. sTil 

 male more glossy, also with broader dark margin than philodice. The under surface is dark orange, light yellow 

 in the middle of the forewing. The $ is much lighter yellow and has in the broad distal margin of the forewing. 

 larger, but diffuse yellow spots. The under surface is light yellow. 



C. hageni Edic. (27b), from- Canada, has the forewing narrow and pointed, particularly in the male, hageni. /"'ff 

 The upper surface in the $ is beautifully yellow, the black distal margin of the forewing, contrary to that of 

 other allied species, broadest at the inner angle. The ground-colour of the under surface is but little different 

 from the upper. The $ is grey-yellow, has broader grey-black distal margin, in which large yellow spots are 

 placed, the under surface is grey-j^ellow. 



C. alexandra Edw. (27b) (the Alexandra Sulphur), from Colorado, is in the <5* above similar to philodice, alexandru. -^ -^ 

 but has more glossy yellow ground-colour with orange-yello-^ tinge, particularly on the hindwing. The under 

 surface, however, is very different in both sexes, namely silver-grey on the hindwing with silvery median, spot. 

 The $ is light yellow, has a small dark distal margin to the forewing or none at all, but black median spot, and 

 is sometimes suffused with orange-yellow. 



C. edwardsii Edw. (27b), from Virginia, has the ujiperside lemon-yellow mixed with orange, with narrow edivardsii. ^ ^^ 

 dark margins. The under surface is as uniform as in alexandra, but yellow, sprinkled with black on the hind- 

 wing, the distal margin is reddish. Probably a form of alexandra. 



C. harfordi Hy. Edw., from California, is lighter yellow above, with narrower dark distal margin, inter- hurjordi. ^^^ 

 sected by the yellow veins, and is still less marked beneath, in the female showing the beginning of a submarginal 

 macular band on the forewing and narrower distal margin (proximally dentate) than barbara B.y. Edw. (27b, c), harbara. f^'S 

 which also occurs in California. The lemon-yellow $ has narrow dark distal margins, the almost sulphur-yellow $ 

 only a diffuse distal margin to the forewing. The under surface is similar to that of philodice. 



C. boothii Curt. (27c), from arctic America (Boothia felix), occurring up to lat. 75°, appears to be very boothii. ^if 

 rare. The markings in the sexes are not so different as is the case in the allied species. The $ has besides the 

 dark distal margin on the forewing an almost complete submarginal band and on the hindwing the beginning ^ 



of one. The under surface, particularly in the^, is strongly greenish. In ab. chione Curt, (as in the Palaearctic chiote. /^ y 

 na.stes ab. insignata, vol. 1, pi. 2.5c) the dark distal margin of the forewing is wanting. — Flies from the middle 

 of July to the middle of August amd is fond of resting on the flowers of Oxytropis arctica and campe- 

 stris (Curtis). 



C. interior Scudd. (= occidentalis Scudd., emilia Edw., astraea Ediv.) (27c), from South Canada and interior. ^^ 

 the Eocky Mountains (the Pink-edged Sulphur), is very similar to philodice, but the dark distal margins are 

 much narrower and the yellow ground-colour runs into them in streaks, the fringes are rose-red. On the under- 

 side the apex of the forewing and the anterior part of the hindwing are rusty orange-yellow. The $ has almost 

 white upper surface and broader, but diffuse, distal margin to the forewing. 



C. scudderi Eeak. (27c) (= Scudder's Sulphur), from Colorado, Utah, Montana and British Co- scudderi. S^O 

 lumbia, has broader, but grey-besprinkled dark distal margin. The $ is usually white, very rarely yellowish, 

 and has only traces of dark margining. The under surface of the $ is yellow, dusted with grey-green at the 



