( Ixiv ) 



not yielded imagines at the end of October, bu1 on being 

 brought indoors produced these early in November. Had 

 they been left out of doors they would certainly not have 

 hatched till the following spring. Consequently in S. Devon, 

 so far as I can judge from three years' experience of breeding 

 specimens and from special observation of living specimens, 

 as well as from more general observations of these during 

 earlier years, the following facts seem to be true : — 



(1) There are always or generally two forms of the spring 

 brood of egerides, a lighter (earlier) and darker (later) one. 



(2) The former is from over-wintered pupae, the latter from 

 over-wintered larvae. 



(3) In some seasons a dark form appears even before the 

 lighter (earlier) spring form, and probably results from pupae 

 which normally should have hatched (as a second brood) 

 during the preceding summer, but have failed to do so. 



(4) As the spring forms overlap in their time of appearance, 

 no doubt interbreeding between them takes place. 



(5) No definite tendency to dimorphism, such as is seen in 

 spring, has been observed in the second generation. 



(6) Owing to the facts stated above, perfectly fresh examples 

 of the spring butterflies can be found from March till well 

 into June, the later ones not being a second brood, but the 

 imagines from larvae that have hibernated, when still very 

 small. It follows from this that the true second or summer 

 brood is likewise very protracted. 



(7) Whether there is a third brood, except as an entirely 

 abnormal' occurrence, is doubtful, at least under natural 

 conditions. 



(8) The second brood specimens resemble the darker (later) 

 spring form rather than the earlier one. 



How far these observations apply to the butterfly in other 

 localities I do not know, but in Somerset and Gloucestershire 

 I do not think the facts will prove greatly, if at all. different. 



A flight of Winged Termites at Barrackpore. — Prof. 

 Poulton said that lie had recently received the following 

 letter from Mr. <i. A. .lames Rothney, referring to Dr. 6. B. 



