316 Canadian Butterflies. 



wings 2 to 2^ inches. Tlie female differs from tlie male in having 

 the black marginal band of the anterior wings broader, more 

 deeply dentated internally, and divided by a series of large greenish 

 yellow spots. 



Some varieties of the male have only one pupil to the eyelet on 

 the posterior wings, and are smaller than that described. Exam- 

 ples of the female sometimes occur, in which the parts usually 

 yellow are greenish white, a circumstance which has led some 

 authors to describe it as distinct under the name of Helice. 

 American specimens differ but slightly from European, but are not 

 of quite so deep a tint as the latter. 



The caterpillar is green, with a lateral stripe varied with white 

 and yellow, and with an orange dot on each segment. It feeds (in 

 Europe) on medicago lupulina, cytisus austriacus, various species 

 of trifolium and other leguminous plants. 



The chrysalis is green, with a lateral yellow line, and several 

 ferruginous dots. 



This handsome species appears in spring, and a second time in 

 autumn. It is not a common species in this country. We took 

 a very fine female on Montreal Mountain, September 10th, 1856. 

 It was flying in a very sluggish manner, and we caught it under a 

 hat. Boisduval says it is found in Europe, Egypt, the coast of 

 Barbary, Nepaul,. Cachemere, Siberia and North America. In 

 England, it occurs in the southern counties in considerable plenty, 

 in certain years, while in others, scarcely an example is to be met 

 with. It seems to prefer the vicinity of the sea, having been 

 found more copiously along the south-eastern coast, particularly 

 in the neighborhood of Dover than elsewhere. 



Species 2. — Colias Chrysotheme. The small clouded yellow. 



Colias Chrysotheme, Godart, Encyclop. method. Ins., t. ix, pars 

 1, p. 103, n. 42. Paris, 1819-1821. 



Colias Chrysotheme, Boisduval and Leconte, Ico. &c., des Le- 

 pidopteres de I'Amer., Sept. t. 1, p. 63. Paris, 1838, 



Papilio Chrysotheme, Hubner, Europ. Schmett, tab. Ixxxv, f. 

 426-428. Augsburg, 1*796-1835. 



This species resembles Edusa a little, but it is much paler, with 

 the margin browner, divided on the anterior wings by fine yellow 

 nerves ; the fore wings have, moreover, the costa broadly yellow. 

 The discoidal spot is narrower, transverse, slightly marked, and 

 edged with a little red. The under side of the anterior wings 

 nearly as in Edusa and the allied species, except that the discoidal 



