p. PANDORUS AND ACHEMON 111 



pull out of the cocoons after making a neat slit in the 

 side of the cocoon at the " exit end." This makes 

 them very valuable birds to have among us ; but if we 

 want woodbine sphingids, it is very trying to see ori- 

 oles fly away with one after another, while we fail to 

 find them in time to save them. 



Famlorus and acliemon are said to be double-brooded, 

 but we have never found them earlier than July in 

 any stage, and the pup* formed from this brood have 

 never given the moth in time for a second brood. 

 Usually our moths have not emerged before the last of 

 June or the first of July of the following year, but 

 occasionally one has come out, when the house has 

 been over-warmed with a furnace fire, in November or 

 December. From early July until October, eggs, 

 larva^, and moths may be found, September being the 

 best month, in New England, for half-grown and full- 

 grown caterpillars. 



