no THE ENTOMOLOGIST, 



presented itself in the spring, however: though apparently 

 quite healthy, they absolutely refused io grow, and this sort of 

 thing continued until the end of the summer, and long after 

 the imagos should have been out, the larvae being even then 

 little more than a quarter of an inch in length. Indeed, as it 

 appeared evident they would hybernate a second time, I got 

 thoroughly tired of them, and either tiu'ned them out or gave 

 them away, I do not remember which. The other brood is 

 from a few eggs I obtained last summer, and the larvae thus 

 far have acted in precisely the same manner as did the 

 former ones : when examined yesterday many of them seemed 

 quite healthy, but show no disposition to feed, though there 

 has been food growing in the cage throughout the winter, and 

 now looks beautifully fresh. The cage has been kept during 

 the winter in a greenhouse (no artificial heat) in the garden. 

 Larvaj of various Acidalia and other species, kept under 

 precisely the same conditions, have been feeding several 

 weeks. — Geo. T. Porritt ; Hudderftfield, April 2, 1874. 



Breeding TcBniocampa opima. — I have read your corre- 

 spondent Mr. W. H. Tugwell's account of the way in 

 which he successfully reared the larvae of Taeniocarapa 

 opima last year (Entora. vii. p. 86). I was equally successful 

 with my brood of that species, though with a totally different 

 kind of treatment. The previous year I had lost every cater- 

 pillar, I supposed through having kept them rather closely 

 confined (the plan which has succeeded in Mr. Tugwell's 

 case), so last year 1 kept them in a roomy cage, which was 

 placed close to a small, constantly-open window ; this kept 

 the larvae nearly always in a draught, sometimes a strong 

 one. The brood was a large one, and fed up fast on willow, 

 and a healthier or finer lot I think I never saw; scarcely one 

 seemed to be lost. Has not the season something to do with 

 it? Opima seems to have been much easier to rear last year 

 than it was the previous one. Willow, too, seems decidedly 

 the most satisfactory food. — Id. 



Migration of Butterjiies. — Mr. Belt, in his interesting 

 work, 'The Naturalist in Nicaragua,' pp. 152 — 154, speaking 

 of this curious fact, says that the butterflies (Timetes Chiron) 

 were all flying in a south-easterly direction, and that the 

 beautiful day-flying moth (Urania Leilus) also joins in this 

 annual movement. Many other travellers have observed 



