TItK CANADIAN KNTOMOLCKJlSf . 29 L 



variation in the size of the black marks, and there is every grade to a 

 nearly black pupa, black marked with white. No two of the melanic 

 examples were alike. Duration of this stage, five to seven days. By 

 the above, it will appear that the pupae also are polymorphic, some being 

 almost wholly white, some almost wholly black, with all sorts of intergrades. 



These resulted from the pupae reared in July and August imagos 

 which came out between 2nd August and 19th : — 

 1st. — From all red larvae 3 orange banded, or Adjutrix 



8 white banded, or Croca/e 

 2nd. — From all black larvae 15 Adjutrix 



3 Croca/e 



From pupae of the succeeding brood of larvae, the imagos out between 

 29th August and 8th September : — 



1st. — All red larva 4 Croca/e 



2nd.' — All black larvae 2 Croca/e 



4 Adjutrix 



3rd. — Red backed larvae. 13 Croca/e 



3 Adjutrix 



1 with a very slight orange tint. 



1 very red and broad band. 

 The last brood of larvae of the year, out of eggs hatched Sept. 15th, 

 hibernated after third moult early in October. As this is exactly the 

 habit of the Phyciodes (as Nycteis and Car/ota), we may assume that 

 the larvye on their waking up early in spring, (Feb. or March, no doubt, 

 at Las Cruces), would be in pupae within two weeks thereafter, to give 

 imagos a few days later. Probably, therefore, the butterflies are on the 

 wing by April, and thereafter a brood will appear at least monthly. If 

 this is so, the first larvye received by me, in July, would have come from 

 the third generation of butterflies of the year. This generation, from 29 

 pupae, gave 18 Adjutrix imagos to 11 Croca/e, or 62 per cent. Adjutrix, 

 and 38 per cent, of Croca/e. The following generation, from August 

 larvae, out of 2S pupae gave 19 Croca/e to 9 Adjutrix (including all red- 

 banded), or 68 per cent. Croca/e and 32 Adjutrix. The proportions in 

 the two generations were nearly reversed, and as the season goes on there 

 would seem to be a tendency to produce the white banded form. It will 

 be of interest to watch the outcome of the hibernating larva?, and I hope 

 by Mr. Cockerell's aid next season to learn which form prevails in the 

 two or three earliest generations. 



As I am correcting the proof of this paper, I can add from a letter of Oct. 21st, 

 from Mr. Cockerell ; — " The Synchlue is still flying here in fair numbers. I find that in 

 a state cf nature the larvie hibernate gregariously in the dead, curled up leaves of the 

 sun-flower. 



