Ninth Report of the State EyTOMOLOGiST 



337 



the bush then, but since a week or ten days many of them have disap- 

 peared: a few, but not nearly all of the missing ones, are on the ground,, 

 dead. They did not occur on any other shrub, although there were a, 

 hundred species of shrubby plants near by." 



Fig. 18. — The caterpillar of Papilio Cresphontes. in natural size. 



Mr, Falconer further stated, that a gentleman whose attention had 

 been called to the larva% identified them with some that had occurred 

 in his garden at Creedmore, L. I., a few years ago on a Fraxinella 

 {^Dictamnus fraxinelld) bush, but on nothing else. Both the Choisya 

 and the Dictamnus belong to the family of Rutacece. 



Other known food-plants of the larva are prickly-ash {Xanthoxylum) ^ 

 hop-tree {Ptelea), orange, lemon, and others of Citrus — all pertaining 

 to Rutacece. The larva is represented in its mature size, and in contrac- 

 tion of its anterior segments, in Figure 18. 



Papilio Cresphontes is a southern species, ranging from the northern 

 part of South America, northward. It has gradually extended its range 

 until now it occurs as far north as the vicinity of Montreal in Canada. 

 The first record of its appearance in the State of New York was in 

 1864, Within late years, from being an occasional visitor, it seems to 

 have established itself in Westchester county, and at Poughkeepsie. 

 In other localities in the State it is occasionally abundant, as in Roch- 

 ester, where, according to Mr, Bunker, it " swarmed," one season, sev- 

 eral years ago. Professor L, M, Underwood has written me that on 

 September 12th, 1882, he saw several examples flying over the low 

 swales near the Rhinebeck and Connecticut railroad in Columbia county. 

 It has not been observed in the neighborhood of Albany, A single 

 example was take'n at New Baltimore, seventeen miles south of Albany^^ 

 in the month of September, 

 1893 43 



