CHAP. XII.] 



EYE-SPOTS. 



295 



ditch in the Cambridgeshire Fens on the same day the individuals 

 shewn in Fig. 76 were selected. These cases especially illustrate 

 the statements numbered (2) and (5), viz. the order of appearance 

 of the colours and the similar Variation of the two pairs of wings. 

 Satyrus hyperanthus : four specimens (Fig. 77) shewing 



III 



II 



IV 



Fig. 77. Satyrus hyperanthus. Various conditions of ocelli. II. is the most 

 frequent form. 



(From Newman's British Butterflies.) 



different conditions of ocelli in this species from Newman's British 

 Butterflies. A form without ocelli is mentioned by Porritt, Ent., 

 xvi., 1883, p. 188. 



On one day I have myself taken all the forms shewn in Fig. 77 

 (except III.) and others in Monk's Wood, so that here no question 

 of seasonal or local difference is necessarily involved. 



Chionobas. The North-American species of this genus [in general appearance 

 somewhat resembling the British Hipparchia semele, the Grayling] are of a brown 

 colour having eye-spots on some or all of the wings. According to Steecker the 

 number of eye-spots varies extremely, and the following instances are given. The 

 species norma may have two spots on fore wings and none on hind wings ; two on 

 f. w. and one on h. w. ; one on f. w. and one on h. w. ; one on f. w. and none on h. w.; 

 three on f. w. and two on h. w. Of the species uhleri one of the types has three on 

 f. w. and four on h. w., the other has four on f. w. and five on h. w., the subapical 

 being very small ; other examples have only one on f. w. and two or three on h. w. 

 The species ehryxus may have one on f. w. and none on h. w.; or two on f. w. and 

 one on h. w. Strecker, Cat. Macrolepid., p. 155. 



Arge pherusa: a butterfly resembling the British Arge galathea, the Marbled 

 White, has a variety plesaura, in which the eye-spots of hind wing are wanting. 



Specimen figured in which the left hind wing is a third smaller than the right 

 and lacks the eye-spots. Failla-Tedaldi, Nat. Sicil., i. p. 208, PL xi. tig. 8. 



