224 THE entomologist's record. 



have given all the offspring dark, from normal females all the offspring 

 normal. 



AcKONYCTA psi. — The typical form is prevalent or exclusive over the 

 whole of England, except the London district. In London and its 

 neighbourhood a dark grey form occurs, and in parts of the district the 

 light form is not found. The dark form is reported as occurring rarely 

 in Wigtownshire (Gordon), Linlithgow (Hewett), York (Hewett), Market 

 Drayton (Woodforde), Cheshire (Arkle), Cambridge (Farren), Colchester 

 (Harwood) (at the two latter places only within the last 20 years), Farn- 

 borough (Hewitt) , an intermediate form is reported from Deal (Colthrup). 

 London district — only dark for 35 years, perhaps darker now than 

 35 years ago (Mera), Dulwich, all melanic (Colthrup), Lee, dark com- 

 mon, light still occurs, but more rarely than 50 years ago (Fenn). 



Xylophasia polyodon (monoglypha).- — In the south and midlands 

 the typical light form is prevalent, with some variation in depth of 

 colour. Over the whole of Scotland, in Ireland, especially in the west, 

 and in the northern counties of England, every grade from light to 

 black is found. According to Barrett the black variety was first 

 described from Scotland in 1857, but there is no evidence of its origin. 

 Records of its increase in frequency are given from Paisley, Hartlepool, 

 and less certainly from Huddersfield. Scotland — Loch Earn, type 

 commoner than black (1892, Doncaster). Near Arisaig, it varies from 

 light to black, dark intermediates prevalent (Doncaster). Wigtownshire, 

 light occurs, intermediates prevalent, brown-black generally with lines 

 visible, common, full black less common (Gordon). Paisley, light to 

 black, dark intermediates prevalent ; the dark forms became commoner 

 between 1890 and 1896, but were found on the moors in the neigh- 

 bourhood before 1890 (Stewart). Ireland — dark and black forms 

 widely spread, especially on west coast (Kane, Tutt). Donegal, varies 

 from light to black, dark forms numerous (Johnson). England- — 

 Newcastle and Tyne valley, light common, intermediate prevalent, 

 black about 4%, found especially nearer the city (Rosie). Hartlepool, 

 light, medium, dark, black, all common; black unknown 50 years ago, 

 not common 20 years ago ; now as many can be taken in one night as 

 in a season 20 years ago (Robson). Yorkshire, ranges from light to 

 very dark, latter occurs more or less all over the county, including 

 Hull (Hewett), Huddersfield, dark prevalent, black about 4% (Pprritt), 

 Leeds (Wigin), York (Hewett), black rare, Giggleswick (Podmore), 

 4 black in several hundreds, Sheffield, full black rare or absent 

 (Doncaster, Brady). Lancashire, Burnley, black perhaps 5% (Clutten), 

 Grange-over-Sands, about 20% (Podmore). Black recorded as rare, 

 Derby (Hill), Rugeley (Freer), Church Stretton (Newnham), Market 

 Drayton (Woodforde), Worksop (Alderson). Isolated very dark or 

 black specimens from Ely (Cross), Southend (Whittle), Tenby (Graves), 

 Reigate, Bristol (Prideaux). 



MiANA sTRiGiLis. — The dark form, with no light grey band, seems to 

 occur over the whole range of the species, but the relative frequency 

 varies greatly. There appears to be discontinuity with regard to the 

 presence of the light band, but in both classes the depth of colour 

 varies considerably. Records from Eastbourne (Colthrup), Felixstowe 

 (Mera), Teignmouth (Jordan), mention the light form as prevalent. 

 In Wigtownshire (Gordon), Lincolnshire (Raynor), at Doncaster 

 (Porritt), Lynn (Baker), Colchester (Harwood), Ely (Cross), Farnborough 



