NOTES ON DANAID BUTTERFLIES — CLARK 533 



plexippus plexrppus, D. p. megalippe, D. herenice herenice^ D. h. 

 strigosa. D. eresimus, D. deofhera, and D. jamaicensi^. In order to 

 facilitate the identification of these forms in localities where informa- 

 tion on the tropical American danaids is not easily accessible, it has 

 seemed advisable to include a key to them. 



At the suggestion of Mr. Clarke the description of an interesting 

 new species from Peru allied to D. nivosxis is appended. 



KEY TO THE NORTH AND MIDDLE AMERICAN SUBSPECIES OF DANAUS PLEXTPPUS 



ff\ Larger, fore wing more than 45 mm. long; fore wing with two light spots 



beyond end of cell; black border of hind wing with more or fewer small 



white spots. 



&\ Two spots beyond end of cell on fore wing and two larger spots between 



these and apex light dull orange contrasting with small white spots on 



costal border; apical portion of fore wing with more or less dull orange; 



two rows of small white spots in blacli border of hind wing. 



plexippus (pi. 71, fig. 1) 



&^ Two spots beyond end of cell on fore wing and two larger spots between 



these and apex white ; apical portion of fore wing with little or no dull 



orange : small white spots in black border of hind wing obsolete or lacking 



except at the outer and anal angles. 



c\ Groimd color of wings dull orange meg:alippe (pi. 71, fig. 2) 



&. Ground color of wings pale lavender-brown tobagi (pi. 71, fig. 3) 



a*. Smaller, fore wing less than 45 mm. long; fore wing lacking the two light 

 spots beyond end of cell ; no small white spots in black border of hind wing. 



portoricensis (pi. 72, figs. 3, 4) 



DANAUS PLEXTPPUS PLEXIPPUS Linnaeus 



Plate 71, Figure 1 



Range. — Trinidad, British West Indies; Cuba; Peru; from Costa 

 Rica (San Jose and Juan Vinas), the Gulf coast, and southern Flor- 

 ida northward throughout North America to Vancouver Island, the 

 Northwest Territories, the Red River Valley, Fort Providence (west 

 of Great Slave Lake), Lake Athabasca, the western shore of Hudson 

 Bay, Moose Factory (on southwestern James Bay), southern Quebec, 

 and Nova Scotia; Bermuda; the Canary and Cape Verde Islands; 

 casual in the British Isles and western Europe; also, as a relatively 

 recent immigrant, from the Hawaiian Islands and eastern Polynesia 

 Avestward to the Andaman Islands, southward to northern New 

 Zealand and eastern aiid southern Australia, and northward to 

 Formosa. 



S^pecimens from tropical America examined. — Mexico: Coatepec, 

 1 9 (William Schaus) ; San Juan, Veracruz, 1 9 (W. Schaus). 

 Costa Rica: San Jose, 1 $ ; Juan Vinas, 2,500-3,500 feet, October 

 1906, 1 $ (W. Schaus and John Barnes). Peru: No further data. 



