List op lepidoptera peculiar to the British islands. 147 



List of Species, Varieties, and Aberrations of Lepidoptera so far 

 only recorded from the British Islands. 



By J. W. TUTT, F.E.S. 



Hydrilla palustris ab. lutescens, Farren. — Ochreous-brown 

 form, comprising about one-third of the British captures. Very near 

 the Lapland form. H. ab. fusca, Farren. — Basal two-thirds of the 

 forewings, blackish-fuscous. Very near the Amurland form. 



Caradrixa MORPHEUS AB. oBscuRA, TuTT. — Deep gi'eyish-fuscous, 

 inclining to black. 



Caradrina taraxaci ab. suffusa, Tutt. — A blackish-fuscous form 

 from Sligo. 



RusiNA uMBRATicA (tenebrosa) ab. OBSCURA, TuTT. — A deep uni- 

 colorous blackish-brown form. Occasionally in England ; more 

 common in Scotland, where it often replaces the type altogether. 



Peridroma ypsilon ab. pallida, Tutt. — The Hebridean form with 

 the outer area of the anterior wings of a whitish colour. 



Agrotis lunigera, a species confined to Britain, the south coast of 

 France and Sicily, is now supposed to be specifically identical with 

 the more widely distributed A. tru.c. The forms of A. luny/era peculiar to 

 Britain appear to be : — Agrotis lunigera ab. pallida, Tutt. — Pale 

 whitish-grey, an extreme form of the male apparently confined to the 

 chalkhills of the Isle of Wight. A. ab. suffusa, Tutt, and ab. nigra, 

 Tutt. — Both melanic forms, the latter unicolorous black. A. ab. 

 RUFESCENS, TuTT. — A rare aberration suffused with red. 



A. vESTiGiALis ab. NIGRA, TuTT. — A blackish-f uscous aberration. 

 A. ab. lineolata, Tutt. — With the cuneiform dashes extending to the 

 hind margin of the wing. 



A. obelisca var. grisea, Tutt. — The Isle of Wight race of this 

 species, which is finely dusted with grey scales. 



A. NIGRICANS ab. PALLIDA, TuTT. — Pale grey, almost unicolorous. 

 A. AB. RUFA, Tutt. — A pale reddish obscurely marked form. A. ab. 

 QUADRATA, TuTT. — With red-browii ground-colour, and dark quadrate 

 spot ; bears a superficial resemblance to A. obelisca var. hastifera. A. 

 AB. fuscovariegata, Tutt. — Dark reddish-brown with a purple tinge and 

 ochreous transverse lines and markings, Kent. 



A. cuRsoRiA AB. CjErulea, Tutt.- — A very rare, pale, slaty-grey 

 form. A. AB. oBsoLETA, Tutt. — Yellowish-grey with obsolete mark- 

 ings. A. AB. ocHREA, TuTT. — Yellowish-ochreous, with pale longi- 

 tudinal markings. A. ab. brunnea, Tutt. — Deep suffused reddish- 

 brown, with the transverse lines ochreous outlined with fuscous. A. 

 AB. sagitta, ? H.-ScH., TuTT. (sAGiTTATA, Staud.). — A beautiful streaked 

 form from Scotland and Shetland Isles. 



A. TRiTici ab. OBSOLETA, TuTT. — Pale grey with no distinct mark- 

 ings, very rare. Deal. A. ab. c^rulea, Tutt. — A pale slate- or dove- 

 coloured form, very rare. Deal. A. ab. pallida, Tutt. — Pale greyish- 

 white, with the normal transverse lines edged with fuscous. A. ab. 

 nigra, Tutt. — Unicolorous blackish, with still darker transverse lines. 

 A. ab. subgothica. Haw. — Greyish-fuscous with space between stigmata 

 dark, no cuneiform spots, and pale costa. A. abs. sordida, Haw., 

 pupiLLATus, Haw., ochracea, Tutt, valligera, Haw., cuneigera, 

 Stephs., albilinea, Haw., lineolata. Haw., venosa, Stephs., 

 hohtorim, Stephs., costanigra, Tutt. None of these forms of this 



