188 THE ENTOMOLOGIST. 



say that the first, a female, appeared on the 6th of May, 

 and the last, a male, on the 10th of June. Platypieryx 

 hamula : May 10th, one male; 30th, two males; June 2nd, 

 two males ; 4th, two males ; 5th, three males, one female ; 

 8th, one female; 10th, two females; 11th, one female, one 

 male; 14th, one female. On examining my remaining seven- 

 teen pupae I found the insects well formed, but dead, which 

 I attribute to the unusual coldness prevailing at their time of 

 appearance. P. falcula : I was supplied by a friend with 

 some eggs of this species, which hatched in due course, and 

 the larvae were all full grown and spun up by the first week 

 in July : on the 1st of August the first imago appeared ; 2nd, 

 one ; Sept. 15, one ; 16th, one ; 18th, one ; 21sl, one : these 

 six were all females and unusually large : as late as the 

 24th of October a male came out, followed by another on the 

 27th. The above results prove that in P. unguicula the 

 sexes are equally represented at the time of emergence : in 

 P. hamula the males are the first to appear, and in P. falcula 

 the females are the soonest out. Ennomos illustraria : a 

 female which I bred in May supplied me with about sixty 

 fertile eggs : the young larvae were placed altogether in a 

 cage and fed upon birch ; some of them grew rapidly and 

 soon spun up, and in July I had four males and seven 

 females of the variety sublunaria ; at this period many of the 

 larvae were but half-grown : so that from the eggs of one 

 female 1 had imago, pupae and larvae, as above mentioned. 

 The remaining larvae fed up well, and are now in pupa : 

 a female has just emerged, which differs in no respect from 

 those bred in May. — William Machin ; 22, Argyle Road^ 

 Mile End, November 1, 1866. 



Arctia faligiuoaa seuiidonble-hrooded. — I wish to add a 

 word to the account of the life-history of this insect. It is 

 semidouble-brooded. The second brood apjiears in August. 

 I have this year reared eighteen larvae from eggs from the 

 spring brood. Half produced very fine iniagos about the 

 last days of August ; the other half are hybernating, without 

 spinning up, as full-grown larvae. — [Rev.) E. Halleit Todd. 



Economy of Agrotis aquilina. — The larva of Agrolis aqui- 

 lina is a general feeder, like A. Segetum. Any one who 

 possesses a garden, and has sown, in the s|)ring, radishes, 

 onions, cabbages or borecole, will find the young weeds that 



