GEOMETRY. 45 



Hybernia progemmaria Hub. 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 W. Richardson); also 

 probably throughout the south West Riding. 



Hybernia defoliaria Z. Distributed throughout the county 

 and usually abundant. 



Askham Bog {W.F.) ; Barnsley {/.H.) ; Bishop's 

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

 Brovig\i{W.D.E.); Huddersfield (G^. 7! P.); Leeds !(^.^.); 

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

 (/. Saiig); Ripon (/. Waite) ; Scarborough {T.W.); 

 Sheffield {A.D.) ■ Thirsk {G.T.) ■ Wakefield {W.T.). 



Also very variable ; a nearly black unicolorous form 

 occurs occasionally at Shipley Glen, Bradford {/. W.C). 



Anisopteryx aescularia W.V. Common. 



Adel (G.T.) ; Arthington !! (JT. Marsh) ; Askham Bog 

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

 ham ! (/.Sm.); Huddersfield (G.T.F); Leeds ! (A. 

 Denny); Masham (C.S^; Pontefract (B.H.); Raskelf 

 (G.T); Richmond (/ &;^^^) ; Sheffield (A2?.) ; Wake- 

 field (W.T); Weldon Wood (C.S). 



Cheimatobia brumata L. Abundant everywhere. 



Cheimatobia boreata Hub. Probably common wherever 



there is any extent of birch. 



Barnsley (J.H.) ; Bradford !! (/. W.C) ; Bramham ! 



(J.Sm) ; Doncaster ! (W. W) ; Huddersfield ! (GTF) 



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



Scarborough (TW); Sheffield (A.D); Wakefield ( W.T) 



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. 



