GEOMETRiE. 45 



Hybernia progemmaria Hiib. Abundant everywhere. 



The dark, almost black, form of both male and female, 

 variety fuscata Mosley, is common at Huddersfield 

 {G.T.F.); and at Wakefield {C. IV. Richardson); also 

 probably throughout the south West Riding. 

 Hybernia defoliaria L. Distributed throughout the county 

 and usually abundant. 



Askham Bog {^W.P.) ; Barnsley {J.H.); Bishop's 

 Wood {G.T.); Bradford !! (/ W.C.) ; Bramham ! {/.Sm.); 

 Bro\ig\-i{lV.D.R.); Huddersfield (6^. 7^ P.); Leeds!(^.^.); 

 Pateley Bridge {G.T.F.) ; Pontefract {B.H.) ; Richmond 

 (/. Sang); Ripon (/. IVai'tc) ; Scarborough (T. JV.) ; 

 Sheffield (A.D.) ; Thirsk {G.T.) ; Wakefield (JJ'T.). 



Also very variable ; a nearly black unicolorous form 

 occurs occasionally at Shipley Glen, Bradford (/. IV.C). 



Anisopteryx aescularia JV.V. Common. 



Adel {G.T.); Arthington!! {H. Mars/i) ; Askham Bog 

 {IV.F.); Barnsley (/.^) ; Bradford (/. ^F.C.) ; Bram- 

 ham ! {J.Sni.); Huddersfield {G.T.F.) ; Leeds ! {A. 

 Denny); Masham (C.^.) ; Pontefract (^.i^.) ; Raskelf 

 {G.T.) ; Richmond (/. Sang) ; Sheffield (A.F>.) ; Wake- 

 field ( JKT.) ; Weldon Wood (C.S.). 



Cheimatobia brumata Z. Abundant everywhere. 



Cheimatobia boreata Ifnb. Probably common wherever 

 there is any extent of birch. 



Barnsley (/.-ff.) ; Bradford !! (/. JF.C.) ; Bramham ! 

 i/.Sni.) ; Doncaster ! (Ji: IV.) ; Huddersfield ! (G.T.F.) 

 Meanwood, Leeds {W.H.T.); Richmond (/. Sang) 

 Scarborough (r.^f-:); Sheffield (^.Z>.); Wakefield ( JP: 7!) 

 York !! ( W.F.). 



Oporabia dilutata W.V. Abundant everywhere. 



The dark-brown variety, obscurata Stand., is as 

 common or more so in the south West Riding as the 

 type. 



