26 Dr. T. A. Chapman on 



"As the egg is much like stygne's I will not go through all the 

 details again, but will note the points of difference. 



"Size. All those observed were distinctly smaller. Height, 

 1"0 mm. to 1 - 1 mm. Greatest width, 085 mm. 



" Colour. Whiter. 



"Number of vertical ribs, 22 to 24, none with less than 22. 



" The arrangement of cells at the top of the egg is on the whole more 

 regular, and the top looks smoother, but this is not always the case. 

 None of the eggs have anything like a eentral pimple, however, as 

 seen in a few stygne. I do not consider this is a good distinction, 

 for I have noticed that in some Satyrids the top of the egg varies in 

 the same species. S. cordula, for instance, has sometimes a decided 

 cone around the micropyle owing to the bunching of the lumpy 

 extremities of the ribs ; in other specimens the top is fairly level. 



" The specks beneath the shell are less numerous, and rather 

 smaller. The groins are better defined, not so straggling ; they 

 are browner, not so pink. The same movement is observable. 



"Before hatching, the eggs underwent similar changes to those 

 noted in stygne but without becoming quite so dark. Hatching 

 commenced on July 23rd, and all the young larvae were out by the 

 afternoon of the next day. 



"Larva is smaller than stygne. Length, when first hatched, 

 2-6 mm., when walking, about 2'8 mm. Width of the head, about 

 0-6 mm. 



" The larva is darker in appearance than stygne and 

 that is on account of the stripes which are more strongly 

 marked, especially the supra- spiracular stripe. The 

 ground-colour is the same in both. If the larvae are 

 mixed together it is quite easy to separate them without 

 any possibility of a mistake. 



" I gave these larvae Brachypodium pinnatum, but was 

 unable to get any with fresh shoots. I also tried them 

 with a Festuca which I had in a pot, but it had only a 

 very few green blades. I tried them with a third grass, 

 but nothing suited them, and they quickly dried up, with- 

 out having eaten anything at all, as far as I could see. 

 They perished several days before the stygne larvae. 

 Stygne ate Brachypodium and another grass, and if they 

 could have got some fresh shoots I have no doubt they 

 would have lived." 



It may be proper to give a short diagnosis of : 



Erehia palarica. 



Colour and markings like E. stygne, except in the inner margins 



