COLIAS IV. 



him at Leipzig, upou Dimorphic species of Lepidoptera in America, in which C 

 Eurytheme is discussed at lengtli. Mr. Boll has, in addition, given me a series 

 of examples of the several forms of the species to. illustrate his paper. 



Kenvaydia was originally separated as a species from examples received prin- 

 cipally from Texas and Mississippi. Large nunibei's from Texas were of this 

 form, while from Mississippi all received were of the form Eurytheme. These 

 last were taken late in the season, but the significance of that fact, I, of course, 

 could not then apprehend. \\\ California, Mr. Edwards and Dr. Behr were con- 

 fident that two distinct species existed, Keewuydin flying early and the other 

 late in the season. This w'as long ))efore anything was known to us of seasonal 

 dimorphism in butterflies, and before any knowledge whatever bearing upon this 

 phenomenon or even of simple dimorphism had been gained by breeding from 

 the egg. At the time, the late Mr. B. D. Walsh, living at Rock Island, Illinois, in 

 correspondence with me, strenuously combatted the idea of two species, asserting 

 that it was a case of variation as in PhUodlce, and that all the varieties were 

 flying at the same time, and must be from the same brood. Tiiis he gave as the 

 result of twelve years' femiliarity with the species. Mr. Walsh was undoubtedly 

 right as regarded the district he had collected in. 



I received from Mr. Dodge, 10th June, 1870, several larvi^ nearly mature, 

 but they had suffered from want of food on the journey and but one lived to 

 make chrysalis. This gave butterfly 17th June, Keewayd'ui i. In 1877, Mr. 

 Dodge sent me three butterfhes, 2S 19, all undoubted Keeioaydin, which had 

 emerged from chrysalis early in July, from eggs laid by 9 Keeioaydin, 4th June. 

 And he also sent eleven butterflies, oS 6?, from eggs "laid by 9 Keewaydm, 

 18th July, 1877, and which emerged from chrysalis between 15th and 20th 

 August, and of these butterflies, 4(? 39 are Eurytheme, 1<? 39 are Keeioaydin. 

 In 1876, I received from Mr. Bean larvre bred from eggs laid by Eurytheme 

 17th Sejitember. These larvae would natui'ally have hybernated when about 

 half grown, but being pi-otected in a warm room, they proceeded slowly to 

 chrysalis, and the butterflies emerged between 1st and 15th February, 1877, 4(f 

 39. Mr. Bean retained several of same lot of larvaa, and from them obtained 

 nine butterflies, SS 19, the first one emerging 23d December. These sixteen 

 butterflies are all of one type. They are as large as the average Keeioaydin, 

 and with as broad a border, but the coloration of the upper side is that of 

 Ariadne, the orange being restricted to a patch on the inner margin of prima- 

 ries. On the under side the color of secondaries is greenish, heavily dusted 

 with gray scales ; tlie discal spot is duplex, large, feiTuginous, more or less 

 suffused with pink ; and the extra-discal points form a complete series on each 

 wing. In these respects this variety is most like the typical Ariadne. It is an 

 intergrade which I designate as Var. A. (Figs. 4, 5.) 



