LIST OF LEPIDOPTERA PECULIAK TO THE BRITISH ISLANDS. 115 



British form. Of a more ochrcous tint than the whiter continental 

 type. A. AB. INFUSCATA, Haw. — A rare melanic form of A. aceris, the 

 win<?s being strongly suti'used with fuscous. 



AcRONicTA LEPORiNA AB. sEMiviRGA, TuTT. — A rare aberration with 

 the space between the undulated transverse line and hind margin 

 suffused with black scales. 



CuspiDiA MEGACEPHALA AB. ocHREA, TuTT. — The ground colour of 

 the anterior wings strongly suffused with oehreous. C. ab. nigra, 

 Shaw. — Forewings totally black. 



JocHE.ERA alni AB. OBSOLETA, TuTT. — The orbicular stigma entirely 

 obliterated. 



Trlena tridens AB. viRGA, TuTT.^With a suffused band parallel 

 to the hind margin. T. ab. rosea, Tutt. — The wings suffused with 

 a delicate rosy tinge. T. ab. bidens, Tutt. — With the basal mark 

 not produced beyond transverse line. T. ab. quinquedentata, Tutt. — 

 The basal mark with two bifurcations. T. ab. juncta, Tutt. — With 

 united stigmata. 



T. psi ab. virga, Tutt. — With the areas directly outside the 

 angulated line darker, forming a transverse band. T. ab. (et var.) 

 suFFusA, Tutt. — The whole of the ground colour suffused, the posterior 

 wings also dark. Has now become the predominant race in the London 

 district. Darkening due to protective needs. T. var. bidens. Chap- 

 man. — The basal dagger having only two wings, and the outer line 

 passing straight to costa instead of sloping towards base — in both 

 respects resembling P. vum/aiithidis. T. ab. rosea, Tutt. — The whole 

 of the anterior wings suffused with rose-colour. T. ab. juncta, Tutt. — 

 With united stigmata. T. ab. bivirg*, Tutt. — With two partially 

 developed transverse bands. 



Arctomyscis euphorble var. myric.e, Gn. — The British form is 

 suffused, much darker than the lowland type of the continent, but very 

 close to the mountain form var. montiraija. The type does not occur 

 in Britain. 



Pharetra menyanthidis ab. OBSOLETA, TuTT. — With faint and indis- 

 tinct markings. P. var. scotica, Tutt. — Larger, brighter, and more 

 distinctly marked than the type. P. ab. suffusa, Tutt. — A suffused 

 and melanic form ; some of the Yorkshire specimens are nearly black. 



Pharetra auricoma ab. similis, Haw. — More ashy than the type. P. 

 AB. menyanthidis, Haw. — The ,^-like mark largely developed. 



Pharetra rumicis ab. salicis, Curt. — A melanic form, with most 

 of the white markings absent." P. ab. euphrase.t:, St. — Paler than the 

 type. 



Arsilonche albovenosa ab. ochracea, Tutt. — The ground colour 

 reddish-ochreous, the wingrays pale oehreous. 



Leucania conigera ab. intermedia, Tutt. — Redder than the type. 

 L. AB. SUFFUSA, TuTT. — The grouud colour dusky ferruginous-red, not 

 bright yellow-orange like the type. L. ah. flavipuncta, Tutt. — 

 The characteristic white spot on the forewings oehreous. 



L. lithargyria ab. pallida, Tutt. — Wainscot with a pinkish 

 tinge. L. ab. fulvescens, Tutt. — Deep ochreous-fulvous, almost ochre- 

 ous-brown. L. ab. extralinea, Tutt. — An additional transverse line 

 between the reniform and the dots parallel to hind margin. L. ab. 



* Since recorded by Schultz from Germany, see Ent. Rec, xiv., p. 84. 



