18 



unable to make any dissections but as far as we can tell by an exam- 

 ination of the Uncus under the binocular the 

 species is closely allied to frigidata. We 

 note however that the neck is rather broader 

 and shorter, the forks of the bifurcation 

 rather longer and there appears to be a tuber- 

 cle or ridge at the base of the neck much as 

 Fic. 3 in excnlpata; it seems to us therefore that we 



Uncus of H. transRguraia g^g dealing with a distinct species. The gen- 

 eral coloration, while greenish as in frigidata, is much paler, the median 

 band is broader at costa and shows no trace (in our specimen at least) 

 of the black discal shading of frigidata. For further details we would 

 refer the student to Mr. Swett's note (C. Ent. 44, 228). The species 

 occurs in early May in Massachusetts; we incline to think that Mr. 

 Swett's mention of New Brighton, Pa. (Merrick) as a locality (1. c. 

 p. 228) is incorrect and that the only species occurring there is frigi- 

 data; the Merrick Collection (now incorporated in our own) contained 

 no transfigurata but a good series of frigidata and any other specimens 

 we have examined from this locality all proved to be the latter species. 



Hydriomena perfracta Swett. (PI. IV, Figs. 1, 2; PI. VI, Fig. 13; 

 PI. VIII, Fig. 6). 



As already noted the species was described as a color form of 

 ccerulata Fabr. {autumiialis Strom) although later (C. Ent. 44, p. 226) 

 Mr. Swett suggests that plnviata Gn. may be the more correct name 

 for the North American species. We entirely 

 concur with him in this view but for the pres- 

 ent hold perfracta distinct from pluviata as 

 there seem to be differences in the shape of the 

 Uncus which place it very close to transfigur- 

 ata. The species seems to be rare; besides 

 Fic- ■» the type which we figure (PI. VI, Fig. 13) we 



Uncus of H. terf.acta j^^^^ ^^^^ ^^g,^ ^ ^jj^gj^ ^ f ^om the Catskill 



Mts. (type locality) in the American Museum material and another 

 $ in our own collection from the vicinity of Calgary, Alta. (Dod), 

 all three specimens being practically identical in maculation and size. 



We would note that while the maculation of both perfracta and 

 pluviata is practically the same, the former species is much larger 

 (30 mm.) than pluviata which averages 25 mm. in the S sex; the 



