AMERICAN LEPIDOPTERA. 191 



to this possibly distinct variety, and is equivalent to Pigritia ochrocom- 

 ella, Clemens. 



Genus 151, AS I OB ISIS. 



104, 741, 742. Blastobasis glandulella. 



Geleehia glandule/la, Riley, Can. Ent. iii. p. 18? 



Blastobasis nubilella, Zell. Verh. z.-b. Ges. Wien, 1873, p. 297; 1875. p. 139. 

 Holcocera glandulella, Riley, Can. Ent. vi. p, 18, Ac, see " Index." 

 Blastobasis glandulella, Chambers, Index. 



Prof. Zeller (Verh. z. b. Ges. Wien, 1875, p. 139) suggests that most 

 probably his Blastobasis nubilella is the species described by Riley as 

 Holcocera glandulella. I have several specimens of B. glandulella 

 which undoubtedly agree with Zeller's figure and description of B, 

 nubilella ; but Prof. Riley's own authority is desirable to confirm the 

 opinion that they are one species. 



Genus GRACILARIA. 

 1029. Gracilaria swederella, Thnb. 

 Gracilaria alchimiella (Wocke, Cat. 2317). 



Gracilaria superbifrontella, Clem. Proc. Ac. Nat. Sci. Phil. 1861, p. 5: Tin. Nor. 

 Am. p. 91, &c, see " Index." 



Gracilaria packardella, Cham. Can. Ent. iv. p. 27, Ac, see " Index." 

 Gracilaria elegantella, F. A B. S. e. Z. xxxiv. pp. 202, 203. 



This specimen in Mr. Goodell's collection is labelled U G. packar- 

 della, Cham." 



Although the pale costal patch occupies a larger proportion of the 

 fore wing than is usual in our European swederella, it seems extremely 

 doubtful whether this can be regarded as specifically distinct. G. sweder- 

 ella varies in this respect, and often approaches very closely to the speci- 

 men before me. I have received others from Miss Murtfeldt as G. 

 packardella, Cham. ; there is a similar specimen in the Peabody Acad- 

 emy of Sciences at Salem, received from Mr. Chambers himself, under 

 the same name. 



These differ from the present example in the somewhat less extended 

 costal patch, being incised beyond the middle of its lower margin by a 

 projection from the darker dorsal portion of the wing. G. swederella 

 often approaches this form also ; and until more evidence has been ob- 

 tained, the distinctness of G. packardella from G '. superbifrontella must 

 be at least open to doubt. 



I find these two varieties referred to in my notes on Dr. Clemens's 

 types of G. superbifrontella, written at Philadelphia in 1872, where 

 they were both placed under the' same name. 



Dr. Clemens himself suggested (Tin. Nor. Am. p. 91) that G. super- 

 bifrontella, Clem., must be closely allied to the European G. swederella ; 



