I.] APPENDIX. 45 



same generation \ The males live longer, and continue to fly 

 when very worn and exhausted. A worn female is very 

 seldom seen ;— ' I believe the female does not live long after 

 laying her eggs, but this takes some days, and probably two 

 weeks.' 



Lycaena violacea. According to Mr. Edwards, the first brood 

 of this species lives three to four weeks at the most. 



Smerinthits tiliae. A female, which had just emerged from 

 the pupa, was caught on June 24th ; on the 29th pairing took 

 place; on the ist of July she laid about eighty eggs, and died 

 the following day. She lived nine days, taking no food during 

 this period, and she only survived the deposition of eggs by 

 a single day. 



Macroglossa skUatarum. A female, captured on the wing and 

 already fertilized, lived in confinement from June 28th to July 

 4th, During this time she laid about eighty eggs, at intervals 

 and singl}^; she then disappeared, and must have died, although 

 the body could not be found among the grass at the bottom of 

 the cage in which she was confined. 



Satitrnia pyri. A pair which quitted the cocoons on the 24th 

 or 25th of April, remained in coitu from the 26th until Ma}' 

 2nd — six or seven days ; the female then laid a number of eggs, 

 and died. 



Psyche graminella. The fertilized female lives some days, 

 and the unfertilized female over a week (Speyer). 



Solenobia triquetrella. 'The parthenogenetic form (I refer to 

 the one which I have shown to be parthenogenetic in Oken's 

 ' Isis,' 1846, p. 30) lays a mass of eggs in the abandoned case, 

 soon after emergence. The oviposition causes her body to 

 shrivel up, and some hours afterwards she dies. The non- 

 parthenogenetic female of the same species remains for many 

 days, waiting to be fertilized ; if this does not occur, she lives 

 over a week.' ' The parthenogenetic female lives for hardly 

 a daj^, and the same is true of the parthenogenetic females 

 of another species oi Solenobia ' (S. mconspiciiella ?). Letter from 

 Dr. Speyer. 



Psyche calcella, O. The males live a very short time ; * those 

 which leave the cocoon in the evening are found dead on the 



^ In the paper quoted above, Edwards, after weighing all the evidence, 

 reduces the length of life from three to four weeks. 



