THE CANADIAN ENTOMOLOGIST. 103 



kindly determined by Mr. H. Edwards, which I am altogether unable to 

 distinguish from small specimens of Sphinx Chersis taken in the vicinity 

 of Pittsburgh, at Orono, Me., and various other localities in the United 

 States. The Brooklyn Check List in making Oreodaphue a variety of 

 Chersis, hardly goes far enough. It seems to me there can be no harm 

 done to science by making Oreodaphue a synonym for Chersis. 



Sphinx Vancouverensis, H. Edw. 



I have a specimen of this form, bred by Mr. Behrens and determined 

 by Mr. H. Edwards. It is a male. If taken in Allegheny County it 

 would be unhesitatingly pronounced to be Sphinx Drupi/erartim, Ab. 

 & S. Mr. Grote, in his Check List of 1882, gives Vashti, Strecker, as a 

 synonym for Vancouverefisis. A comparison of Strecker's figure in Lep., 

 Rhopal. & Heteroceres, pi. xv., fig. 4, with the specimen before me, indi- 

 cates considerable difference. In my mind it is very doubtful whether 

 Vashti is correctly regarded as a synonym for Vancouverensis, while it 

 seems clear to me that Vancouverensis is a synonym for Drupiferarum, if 

 my specimen determined by the author of the species is an index. 



Dolba Hylaeus, Drury. 



This moth is exceedingly common in Southern Indiana, where the 

 larva feeds on the Asiniina triloba, or Pawpaw. I have taken as many as 

 ten larvee from a small Pawpaw bush. 



Dilophonota Ello, Linn. The description of the preliminary stages 

 of this species given by Prof Fernald is evidently founded upon Boisdu- 

 val, who derives it from a figure given by Madame Merian on the sixty- 

 first plate of her work, which Boisduval supposes was intended to repre- 

 sent the larva of Ello. The description is exceedingly defective, and in 

 the interest of more exact knowledge I shall venture to give one founded 

 upon a series of beautifully prepared larvae obtained from my valued cor- 

 respondent, Dr. Wittfeld, who accompanied the specimens with a number 

 of interesting MS. notes. 



Egg. — " Dark green ; deposited on the under side of the leaves of the 

 food plant, which is Euphorbia heterophylla.'" (Wittfeld). 



Larva. — The larva presents again the phenomenon of dimorphism, or 

 rather of dichromatism, alluded to in the foregoing note upon H. Tenuis. 

 A part of each larval brood is green from the time of the first moult, and 

 a part remains of a purplish brown color, the color of the newly hatched 

 larvae. 



