the Life History of Agriades ther sites. 301 



parting from the pupa case and some air being present 

 between; this pupa shows the abdominal incisions 2-3 

 (doubtful), 3-4, 4-5, 5-6 and 6-7 (distinctly) open dorsally, 

 4-5 and 5-6 all round. By " open " I mean the stretching 

 that occurs at this stage, when the adjacent segments 

 are " free." 



This pupa, emerged at 11 '55. 



Another pupa (3 j9.m.) shows very evidently the under- 

 side spotting of the upper wing, two others very dark, 

 about same stage, show only uniform black colouring. 



For 24 hours before emergence the ends of the antennae 

 are seen to recede about 0'3 or 0'4 mm. from the extremities 

 of their cases. 



Feb. 22. First butterfly {^) emerged. This not from 

 the earliest larva, as it died when laid up for pupa, probably 

 from being kept too dry. 



Feb. 23. Two larvae that passed the winter out of doors 

 are now full grown ; one has very distinct and bright, but 

 slender yellow lines along the dorsal and lateral flanges, 

 as usual looking like threads sunk some way beneath the 

 surface. 



The dates of emergence are (not including larvae started 

 at later dates) as under. These are only of interest as 

 showing relative proportions and dates of emergence of 

 the sexes. 



After these I had two males emerge and from larvae 

 given to friends 1 male and 3 females appeared, making 15 

 males and 8 females. 



Feb. 28. 11.55 cr.w. Observed the emergence of a butter- 

 fly, a $. The thorax split dorsally, and by the usual 

 vermicular movements of the abdomen, the abdomen 

 progressed forwards, pushing the thorax in front of it, 

 but the head remained capped by the pupal headpiece, so 

 that the effect was to bend the butterfly in such a way 

 that the thorax protruded dorsally, the pupal thoracic 

 pieces being forced widely to each side, until the wings 



