30 THE ENTOMOLOGIST. 



the sudden change of temperature just at the time they were 

 about to emerge from the pupae. On the 24th of July I received 

 from Illinois fifty eggs of C. imperialis. These hatched the very 

 day they arrived, and the following ; but, although they were 

 very active and looked healthy, they all died within a few days. 

 My American correspondent was equally unsuccessful with the 

 rearing of larvae of the same brood. On referring to my article 

 in the ' Entomologist,' on the rearings of 1881, it will be seen 

 that I was very successful that year rearing the larvae through all 

 their six stages. I had that year artificial heat to force the moths 

 out of the pupae, the temperature being from 20° to 25°, some- 

 times 28°, centigrades. 



Dryocampa [Anisota) rubicunda. — -With a quantity of pupae of 

 this species I was unsuccessful also, obtaining one moth only on 

 the 1st of June, the remaining pupae having dried up. 



Orgyia leucostigma. — Ova of this interesting little species I 

 received from Iowa during the winter or early spring. The larvae 

 I bred most successfully, so did several British and continental 

 entomologists. The larvae began to hatch on the 12th of June, 

 and the first moth appeared on the 5th of August. I bred a 

 large number of the larvae under glass ; some were placed on 

 trees in the garden for their acclimatisation, with what result we 

 may perhaps learn next year. 



Hemaris tenuis. — I had this year fourteen pupae of a little 

 sphinx sent to me as being H. tenuis, but which Mr. Kirby 

 identified as being H. diffinis. Eight moths were obtained from 

 these pupae from the 7th to the 18th of June, but, in spite of all 

 my contrivances, I could not obtain a single pairing. Only two 

 eggs were found, which did not hatch. 



Apatura clyton. — Larvae of this species were sent to me from 

 Illinois, and I received them in their dormant state on the 28th 

 of March. They were fastened in groups to dried leaves of the 

 Celtis occidentalis, commonly called the nettle tree, on account of 

 its leaves resembling those of the tall or stinging nettle, Urtica 

 urens. Most of the larvae were on the under surface of the leaves, 

 and there were about five or six dozens of them. Shortly after 

 their arrival (I did not take notice of the exact date) these little 

 larvae commenced to come out of their state of lethargy, a few 

 only on the first days ; and in the course of two or three weeks 

 all were alive. The difficulty, as soon as they had begun waking 



