404 BRITISH LEPIDOPTERA. 



5. With the costal part reduced to median spot, the inner-marginal part 

 obsolete—ab. pallida-centripuncta, n. ab. 



6. With the band entirely obsolete—ab. pallida-obsoleta, n. ab. 



Ground-colour reddish-grey or red (strongly tinged with green). 



1. With complete transverse median bandzrztzliae*, Linn. 



2. With band broken medially into costal and inner-marginal partszrab. 

 ■maculata, Wallgrn. 



3. With only costal part of band, inner-marginal part obsolete=zab. costi- 

 puncta, Clark. 



4. With only inner-marginal part of band, costal part obsolete—ab. margine- 

 puncta, n. ab. 



5. AVith the costal part reduced to median spot, the inner-marginal part 

 obsolete=z:ab. centripuncta, Clark (mab. ulmi, Bartel). 



6 With the band entirely obsoletezzrab. obsoleta, Clark. 



Ground-colour entirely red or red-brown. 



1. AVith complete transverse median bandz=ab. brunnea-transversa, n. ab. 



2. With band broken medially into costal and inner-marginal partsrrzab. 

 brunnea, Bartel. 



3. AVith only costal part of band, inner-marginal part obsolete:=ab. brunnea- 

 costipuncta, n. ab. 



4. With only inner-marginal part of band, costal part obsoletemab. brunnea- 

 marginepuncta. n. ab. 



5. With the costal part reduced to median spot, the inner-marginal part 

 obsoleteinab. brunnea-centripuncta, n. ab. 



6. With the band entirely obsolete—ab. brunnea-obsoleta, n. ab. 



Ground-colour entirely green (or very faintly tinged medially with 



reddish). 



I. With complete transverse median band=ab. virescens-trcuisversa, n. ab. 



2 AVith band broken medially into costal and inner-marginal parts=ab. 

 virescens-7?iaculata, n. ab. 



3. With only costal part of band, inner-marginal part obsolete—ab. virescens- 

 costipuncta, n. ab. 



4. With only inner-marginal part of band, costal part obsoletezrrab. virescens- 

 marginepuncta, n. ab. 



5. With the costal part reduced to median spot, the inner-marginal part 

 obsolete—ab. virescens-centripuncta, n. ab. 



6. AVith the band entirely obsoleter=ab virescens-obsoleta, n. ab. 



The following appear to be the described forms of this species : 



a. ab. obsoleta, Clark, " Ent. Rec," i., p. 328, pi. A., fig. 1 (1891) ; CklL, 

 " Ent. Rec," ii., p. 16 (1891). Tiliae var., Newm., "Ent.," viii., p. 194, tig. 

 (1875). Immaculata, Bart., " Die Palseark. Gross-Schmett.," ii., p. 149 

 (1900). Exstmcta, Staud., "Cat.," 3rd ed., p. 100 (1901). — Anterior wings 

 of a delicate fawn-colour, with the basal area and transverse lines slightly darker, 

 the central area having the faintest tinge of pink, without the trace of a transverse 

 band ; the extreme ouiyr area strongly tinged with green. Posterior wings orange- 

 coloured, with a dark brown central band, united to the dark scales of the base 

 (Clark). Belgium (teste Bartel). France: Indre — La Chatre (Sand). Germany: 

 Saxon-Altenburg — Altenburg. Russia : Kasan Govt, (teste Bartel). 



Staudinger's diagnosis, under the name exstincta reads : " Al. 

 ant. sine fasciis nee maculis, saspius fere uhicoloribus " (Cat., 3rd ed., 

 p. 101). Bartel's diagnosis runs: " cf , ?. In examples of this 

 aberration, the small dark spot in the middle of the upperside 

 of the forewing and found in ab. ulmi is entirely wanting. In place 

 of it there is a light-coloured area which occupies the median area 

 of the wing and extends somewhat towards the margin of the 

 wing." Robson records (Proc. South Lond. Ent. Soc, 1895, P- 4 1 ) an 

 example with no trace of the usual dark band across the forewing. 



* Linne's original description (ed. x., p. 489) defines the type as " fasciatis " ; 

 in his xiith ed. he calls it " subfasciatis," which \vc suspect is Wallengren's ab, 

 maculata (see antect, p. 400, and postea, p. 400). 



