146 THE ENTOMOLOGIST. 



though just along the costa more numerous and darker, as often 

 occurs in euphenoides. 



I cannot entirely get rid of my first impression that this is a 

 hybrid between cardamines and euphenoides. The date of its 

 appearance was a fortnight earlier than euphenoides this year, and 

 three weeks before cardamines, which this year was very late — 

 later than euphenoides, though it is usually earlier. Though these 

 two species are exceedingly distinct, the little I have done to 

 elucidate this specimen leaves me with an impression that a 

 series of these species, and of griineri, damon, and one or two 

 others from a sufficiently great number of different stations, 

 would result in some difficulty being experienced in precisely 

 demarcating them. Under this impression the further hypothesis 

 as to my specimen arises, that it is an atavistic aberration of, 

 say, cardamines that occurs in Eastern Europe as the denned 

 species griineri, which has at least two forms — that I saw in 

 M. Constant's collection, and that, that is well represented in the 

 British Museum. 



Betula, Eeigate : April, 1899. 



[Dr. Chapman has been good enough to allow us to examine this 

 very interesting specimen, and we are quite disposed to believe with 

 him that it is a hybrid cardamines x euphenoides. In general respects 

 the specimen is perhaps more cardamines than euphenoides, but at 

 the same time it exhibits fairly strong traces of certain euphenoides 

 characters. 



With regard to yellowish colour, it may be mentioned that carda- 

 mines (thibetana, Oberth.) from Western China is of this tint, whilst 

 some examples of cardamines from Syria (coll. Leech) have traces of 

 a black internal edging to the apical patch. — Ed.] 



RYALE OR ED USA. 

 By Henry H. Brown. 



This vexed question is revived in the ' Entomologist ' for May. 

 I propose to call a witness who has not hitherto been directly 

 adduced in the controversy — Prof. Bergstrasser. The second 

 part of his ' Nomenclatur und Beschreibung der Insecten in der 

 Grrafschaft Hanau-Munzenberg,' published at Hanau in 1779, 

 contains well-executed figures of two species now included in 

 Eurymus (Colias). These are thus named by him : — 



Plates 2 (figs. 3 and 4) and 18 (fig. 1) : 



Hyale P. D. C. alis integerrimis rotundatis flavis, posticis 

 macula fulva, subtus puncto sesquialtero argenteo. Linn. S. N. 

 2, 764, 100 ; Fabric. 477, 148 ; Bai, 112, 6 ; Mouffet, 100 ; Uddm. 

 Dissert. 56. 



