306 THK ENTOMOLOGIST. 



Mr. Arnold, and he distinctl}^ saw the markings ; and states that 

 amongst the flowering myrtles and geranium bushes of the 

 warmest part of England it did not look out of place. This is 

 the ninth specimen of A. 'plexippus recorded as having been seen 

 in England this year. No doubt numbers have been seen, and 

 their appearance has not been recorded. 



I have been in correspondence with Messrs. Anderson and 

 Jenkin, and in each case, of the four Cornish specimens, there 

 seems no reason to doubt but that they were actually bred in this 

 countr3\ It is, therefore, probable that some impregnated females 

 crossed the Atlantic, and deposited their eggs on a plant capable 

 of affording food to the larva. 



Anosia plex'q)pus, according to Professor Riley, in the * Third 

 Annual Report on the Noxious, Beneficial, and other Insects of 

 the State of Missouri' (1871, pp. 143-152), is in that State 

 double-brooded. The hybernating female appears in May, lays 

 eggs, and the first butterflies emerge about the middle of June ; 

 these lay eggs again, and the second brood appears on the wing 

 in October. Probably in the region of Hudson's Bay, from which 

 I have received the insect, it is but single-brooded. The inclement 

 climate of the latter district does not affect the size of the imago 

 indeed I have one from Moose rather larger than a specimen 

 Mr. P. Crowley gave me from Fiji, both males. 



Two of the plants on which the larva feeds, viz., Asclepias 

 tuherosa and A. purpurascens, a,Ye hardy in this country; audit 

 would be very desirable to ascertain whether either of these 

 plants are grown in any of the gardens near the spot where the 

 specimens under consideration were captured. 



Professor Riley, in the same report, states that the imagines 

 often appear in immense swarms, millions filling the air to the 

 height of three or four hundred feet. If but a few of these 

 descended and hybernated on board an ocean steamer trading to 

 this country, they might even cross the Atlantic several times 

 before they awoke from their winter's sleep. 



The chrysalids are suspended in a similar manner to those 

 of the well-known species of Vajiessa and Pyrameis, and, like 

 them, the chrysalis state lasts but a short time. The emergence 

 takes place in about ten days from the period of transformation 

 of the larva. 



There appears to me to be a fair chance th&t Anosia jilexlpp us 



