COLIAS IV. 
him at Leipzig, upon Dimorphic species of Lepidoptera in America, in which C 
Eurytheme is discussed at length. Mr. Boll has, in addition, given me a series 
of examples of the several forms of the species to illustrate his paper. 
Keewayclin was originally separated as a species from examples received prin¬ 
cipally from Texas and Mississippi. Large numbers 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. In California, Mr. Edwards and Dr. Behr were con¬ 
fident that two distinct species existed, Keewaydin flying early and the other 
late in the season. This was long before 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 Philodice, and that all the varieties were 
flying at the same time, and must be from the same brood. This he gave as the 
result of twelve years familiarity with the species. Mr. Walsh was undoubtedlv 
right as regarded the district he had collected in. 
I received from Mr. Dodge, 10th June, 1876, several larvae 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, Keewaydin $. In 1877, Mr. 
Dodge sent me three butterflies, 2 $ 19, all undoubted Keewaydin , which had 
emerged from chrysalis early in July, from eggs laid by 9 Keewaydin , 4th June. 
And he also sent eleven butterflies, 5d 69, from eggs laid by 9 Keewaydin , 
18th July, 1877, and which emerged from chrysalis between. 15th and 20th 
August, and of these butterflies, 4J 39 are Eurytheme, 1$ 39 are Keewaydin. 
In 1876, I received from Mr. Bean larvae bred from eggs laid by Eurytheme 
17th September. These larvae would naturally have hybernated when about 
half grown, but being protected in a warm room, they proceeded slowly to 
chrysalis, and the butterflies emerged between 1st and 15th February, 1877, 4 J 
39. Mr. Bean retained several of same lot of larvae, and from them obtained 
nine butterflies, 8<? 19, the first one emerging 23d December. These sixteen 
butterflies are all of one type. They are as large as the average Keewaydin , 
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; the discal spot is duplex, large, ferruginous, 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.) 
