1914.] 229 



that in these remote northern localities it is not a resident species, but 

 a migratory straggler. On the Pacific coast it reaches at least as far 

 north as Vancouver Island, where it is no doubt resident, although I 

 did not have the good fortune to see it when I was there in 1882. In 

 South America its range extends southward from the Isthmus to the 

 estuary of the Eio de la Plata, where, at Monte Video, I saw it 

 commonly in 1880, and, on the authority of Berg (Scudder, I.e., p. 728), 

 through Southern Argentina into Patagonia. On the western side of 

 the continent, where it assumes the form nigrippus, Haensch (Seitz, 

 I.e., p. 113), characterised by having the fulvous subapical spots in the 

 fore- wings replaced by white, it appears to stop short at Southern Peru, 

 being for some unaccountable reason absent from Chili. Finally, 

 the stormy winds of the South Atlantic have in one instance at least 

 carried the southern representative of D. plexippus as far as the 

 Falkland Islands, in lat. 52° S, long. 69° W. In the " Proceedings of 

 the South London Entomological Society " for May 26th, 1892, we read 

 that " Mr. J. Jenner Weir exhibited a specimen of A nasi a plexippus, L., 

 var. erippus, Cramer, which had been obtained by one of the employes 

 of Captain Parke in the Falkland Islands .... During Captain 

 Parke's residence in these islands for about twenty years he had never 

 seen a specimen of the Anosia in question ; it therefore appears that, 

 like its northern representative, the true Anosia plexippus, the southern 

 form had the migratory habit similarly developed." 



Taking the interval between the extreme northern and southern 

 points at which it has been observed, it will be seen that Danaida 

 plexippus has the wonderful range in latitude of over 110°. This is at 

 least as great as that of the cosmopolitan Pijrameis cardui, whose 

 range extends as far north as, and perhaps beyond, the Arctic Circle, its 

 limits to the south being New Zealand and Tasmania. 



Observations of Danaida plexippus and other Insects 



at Sea. 

 The observations on insects alighting on ships in the open 

 ocean, commencing with the classical instance recorded by Darwin 

 (Naturalists' Voyage, ed. 1901, p. 158) of a large grasshopper or 

 locust which flew on board the " Beagle " when 370 miles from the 

 African coast, are too numerous for quotation, but I venture to give 

 here my own experiences in this respect. On the outward voyage of 

 H.M.S. " Kingfisher " in 1880, in about lat. 44° N., long. 23° 30' W., 

 my diary notes — " a Sphinx convolvuli seen flying wildly and strongly 

 about the ship," the nearest islands to windward being Graciosa and 



