AMERICAN LEPIDOPTERA. 187 



Ypsolophus pauciguttellus, Clemens, Proc. Ent. Soc. Phil. ii. p. 124; Tin. Nor. 

 Am. p. 228; Zeller, Verh. z.-b. Ges. Wien, 1873, pp. 283-285. 



Chcetochilus conUibernatellus, Fitch, Rep. Nox. Ins. N. Y. no. I, p. 231, no. 3, 

 sec. 44. 



Ypsolophus contubernatellus, Chambers, Bull. U. S. G. & G. Surv. iv. p. 166. 



Ypsolophus flavivittel I us, Clemens, Proc. Ent. Soc. Phil. ii. p. 429 ; Tin. Nor. Am- 

 p. 254; Zeller, Verh. z.-b. Ges. Wien, 1873, pp. 283-285. 



Ypsolophus reedella, Chambers, Can. Ent. iv. p. 222. 



Ypsolophus ruderella, Chambers, Bull. U. S. G. & G. Surv. iv. p. 167. 



Ypsolophus qucrcipomonella, Cham. Can. Ent. iv. pp. 222, 223; Bull. U. S. G. & 

 G. Surv. iv. p. 167. 



? Dichomeris ligu/ella, Hub. Ziitrage, p. 143, — '! = var. contubernale/lus. 



A specimen of this species in Prof. Riley's collection is labelled 

 " Palmer worm-moth." Under this name it was originally described as 

 Rhinosia pometellux by Dr. Harris. It was placed by Dr. Fitch in the 

 genus Chtetochiltis, who also described the variety called the " comrade 

 Palmer worm" (Chsetochilus contubernatellus}, met with in company 

 with the typical form, and regarded by him as a distinct species, although 

 he was not without suspicions that it might be only a variety. Dr. Clem- 

 ens subsequently described the typical form as Ypsolophus pauciguttel- 

 lus and the variety as Ypsolophus Jlavivittellus. Mr. Chambers's type 

 of the Ypsolophus reedella, in the collection of the Peabody Academy 

 of Sciences of Salem, cannot be separated from Y. pauciguttellus, Clem. ; 

 and he himself suggests in his "Index" that it may be a variety of Y. 

 pometellus. Specimens of the same form in Prof. Fernald's collection, 

 obtained from Miss Murtfeldt, are labelled Yjisolojt/tus querc ipomonella, 

 Cham., but do not agree with his description. It would be interesting 

 to know if this name was suggested by Miss Murtfeldt from a knowledge 

 of their larval habits. Their excellent condition suggests the idea that 

 they may probably be bred specimens. 



Professor Zeller {loc. cit.) first drew attention to the probability that 

 Clemens's name pauciguttellus must give way to the earlier name pome- 

 tellus of Harris, and that flavivittellus, Clem., was the same as coutuber- 

 natellus, Fitch. 



From intermediate varieties which have reached me from more than 

 one of my American correspondents, and which show some or all the 

 discal and plical spots as in Y. pometelhis, and have the pale costal halt 

 of the wing more or less clearly defined as in Y. flavivittellus, I am con- 

 vinced that these will be found to be different forms of the same spe- 

 cies. Dr. Fitch {loc. cit.) describes a larva differing from the larva of 

 his Chcetochilus pome'tellus, which he regards as probably that of C 

 contubernatellus ; but as he failed to verify this by rearing the moth 

 from it, evidence of their distinctness in the larval stages is entirely 



