1G 



brilliant. A few species, diverging considerably from the general 

 facies, are found in the Andes of South America, and one species 

 occurs at the Cape, but the Indo-Malay and Australia regions have 

 no representative. 



The species form a very distinct group, and anyone who knows 

 E. edusa would not fail to recognise any member of the genus. In 

 his "Catalogue of the Rhopalocera " of the world, Kirby, in 187 1-9, 

 enumerated forty-seven species and numerous forms. Some of these 

 have fallen as species with extended knowledge. Ruhl, in 1895, in 

 his "Palaearctic Gross-schmetterlinge," gives thirty-six species and 

 many varieties. Six years later Staudinger names thirty-seven species 

 for the same area, while in 1901 Dyar, in "Catalogue of North 

 American Lepidoptera," gives sixteen species. Thus at the present 

 time there are probably some sixty species, with a very considerable 

 number of seasonal and geographical races. 



The general coloration of all the species is yellow of various shades 

 and depths as a ground, running into suffusions of deep orange, and 

 often shot with purple. In the ? of many species dimorphism is 

 found, in which case the second form of the female has a white or 

 very pale ground colour. In some species the female always has a 

 similar basal colouring to the male. All the species have more or 

 less pronounced black borders, which in the females are always 

 spotted with the ground colour, and generally finely grained with 

 lighter shade. The discoidal spots are invariably black and prominent 

 on the forewings above, large, silvery, and with a rusty margin on the 

 hind wings below. 



The larvpe of all the species, so far as they are known, feed on 

 Leguminosse, generally species of clover ; and the underside of the 

 hind wings of the butterfly, when the insect is at rest with its wings 

 closed, is said to resemble a faded clover leaf with a central fungus 

 spot. 



I have also put in the box wings of both E. edusa and E. hyale, 

 which have been denuded of scales by the Waterhouse process, in 

 order to show the neuration. It will be readily noted that they are 

 extremely alike, although slight differences are apparent. Below is a 

 general sketch of the neuration of a Lepidopteron to show in what 

 way a Eurymus (Colzas) differs from it and has its own special 

 character. 



The subcostal vein has only four branches instead of five. The 

 first branch arises before the end of the cell, the second branch at 

 the end of the cell, the third and fourth fork including the apex ; 

 the upper radial arises from the subcostal at some distance from 

 the cell. 



