THE CANADIAN ENTOMOLOGIST 71 



The forms of D. citrata and mulleolata, together with related 

 species I have seen, may be listed as follows: — 



1. Dysstroma citrata Linn, (gray central band). 



(a) Ab. piinctum-notata Haw. (white central band). 



(b) Ab. immanata Haw. (black central band). 



(c)' Ab. simpliciata Walk, (black central band, white spots at 

 margins). 



(d) Ab. tysfjordensis Strand (black central band, gray spots at 



margins). 



(e) Ab. insoJida Prout. (gray central band, black at edge). 



?(f) Ab. rufibrunnea Warren (white centrally, suffused with 



reddish brown). 

 ?var. brunneafa Pack, (blackish central band, brownish basally 



and extradiscally). 

 Syn.? suspectata Moesch. 



2. Dysstroma midleolata Hulst. 



(a) Ab. sobria Swett. 



(b) " subiimbrata Swett. 



(c) " ochrofiiscaria Swett. 



3. Dysstroma hersiliata Gn. 



" ab. mirandata Taylor. 



4. " ivalkerata Pears. 



5. " occidentata Taylor. 

 " ab. mutata Taylor. 



6. " ethela Hulst. 



7. " casloata Taylor. 



8. " boreata Taylor. 



9. " decor at a Taylor. 



10. " htilstata Taylor. 



There are other species to be added, but I ha\e not had the 

 opportunity to examine them in series, so will omit them for the 

 present. The aberrations simpliciata Walker and tysfjordensis 

 Strand, I have doubtfully referred to our fauna, but at least we have 

 very closely allied forms which, if not identical wdth the European 

 forms, are hardly distinct enough to warrant description. A very- 

 interesting fact is brought forth by Edelston (Zool., XXI, page 

 8784), viz., that truncata is normally double brooded and passes 

 the winter in lar^"al form, while citrata is single brooded and passes 



