147 



ish, with a slightly brown margin. In all old collections are many 

 specimens collected by Abbot ; at Francillon's, Donovan's and 

 other sales, some of these have been dispersed, and have crept 

 into collections nominally British only. At Milne's sale, a large 

 number of Abbot's insects were bought by the British Museum. 

 The large Sphinx I mentioned in Abbot's drawing, of which 

 one was sold at his sale, is Labruscce. You have thus, Brontes, 

 Labruscce, quinquemaculatus and Chionanthi, with at least two 

 other large Sphingidce to add to your list. Kirby's Smerinthm 

 Cerisyi is only a variety of 8. geminatus, I imagine. 



HARRIS TO DOUBLEDAY. 4 



CAMBRIDGE, Aug. 31, 1840. 



Eudryas grata changes to pupa in the earth without forming 

 a cocoon ; the pupa is quite different from that of any other 

 moth known to me ; it approaches, however, somewhat to that 

 of Dryocampa, being very dark colored and rough, or granu- 

 lated, and almost serro-dentate around the edge of the ventral 

 segments. 



This summer I have made the interesting discovery of the 

 larva of Papilio Pldlenor in Massachusetts, having found 

 them just hatched on the Aristolochia sipJio in the Botanical 

 Garden, on the 5th of this month (August). Pldlenor has 

 never, to my knowledge, been observed before in the New 

 England States, though it is common in New Jersey, near 

 New York City. Aristolochia sipho grows wild in the woods 

 about New Haven, which is the nearest locality to Cambridge 

 of this genus of plants. It is possible that Philenor may be 

 found there, and from thence an impregnated female may have 

 migrated, or may have been carried by the winds to this place. 

 In the Middle and Southern States Pldlenor inhabits Aristo- 

 lochia serpentaria. The young larvae of Philenor, before the 



