262 



CIDARIA. By L. B. Prout. 



ericetata. the distal area at times with only quite weak dark shading. Hindwing whitish or very pale grey. — ericetata 

 Steph., the only form known to me from Scotland, is considerably smaller, darker-marked, tlie white band 



norvegica distally to the median generally with a sharper dividing-line, the hindwing darker grey. — norvegica Prout, 

 from Norway, is as small as ericetata but otherwise forms a strong contrast to it, being more tveakly marked 



monticola. than the name-type. — ab. monticola Strand is a rare aberration, with the median area not darkened at all, 

 but only indicated by the lines which limit it. Mentioned from Norway and Scotland. — The larva is stout, 

 tapering at the extremities; pale green or yellow-brown, with yellow-brown or paler dorsal stripe, divided by 

 a dark mediodorsal line and also edged by dark lines; a pale lateral stripe, sometimes reddish bordered; 

 head, prothoracic and anal plates brown. In the seed-vessels of Euphrasia officinalis. The pupa hibernates 

 and is yellow, with the segment-incisions brown and the wings green, minorata flies from the end of June 

 to August, in Scandinavia, Scotland and the mountains of Northern and Central Europe. 



blandiata. C. blandiata Schiff. {^= adaequata Bkh., derasata Schr^ (lOg). Related to minorata but with the band 



between the basal and median obsolete or very shadowy (extremely pale brown) the median band very dark 

 anteriorly but pale in the middle, except on the veins, the hindwing rather more strongly marked. — ab. 



coai c a a. (.Q^f j-^g^g Front has the median band narrowed to a mere thread. — perfasciata form. nov. has the median 

 band dark throughout and appears to form a constant local race in the Hebrides. — The larva is similar to 

 that of minorata, very variable but in general more brightly green with crimson or purple markings and 

 yellow lateral ridge. In the seeds of Euphrasia officinalis. Pupa yellowish green with a crimson dorsal line; 

 hibernates. Imago in June and July, chiefly in mountain districts. Central and Northern Eut-ope, N. Italy,. 

 Croatia, Brusa, Armenia and the Changai Mountains. 



pe^-fasciata. 



alhulata. C. albulata Schiff. (^ ablutata Ev.) (10 g). Related to the two preceding, on an average larger, the 



markings much weaker, brown, hi the name-type the ground-colour is white and the markings quite indistinct, 

 light brown or grey-brown, the median band scarcely indicated except by transverse lines. Our English race 

 is less pure white, generally somewhat suffused with greyish or yellowish, but scarcely needs a separate name. 



qriseaia. — ^^- grJseata Stgr. indicates the more extreme examples of this English race, in which the greyish tone of 



the markings becomes more pronounced and there is even some admixture of fuscous; the ground-colour 



subfasciaria. remains white, but the hindwing is greyish. — subfasciaria Boh. is a small yellowish-grey or brownish-grey 



form, in general weakly marked, and occurs in some of the Scandinavian mountains and in the Shetland 



thules. Islands. — ab. thules Weir is merely an extremely darkened aberration of subfasciaria, perhaps found only in 



dissoluia. the Shetlands. — dissoluta Strand, from Arctic Norway, is paler than the type, perhaps on an average smaller, 

 but not so small as subfasciaria. It occurs also as an occasional aberration in the Swiss Alps, Bucovina and 

 hebudium. Roumania. — ab. hebudium Weir (= niveata Steph. nee Scop., hebrideum Rohs. and Gardn.) is a pure white, 

 markingless aberration of exceedingly rare occurrence except in the Hebrides, where it is comparatively frequent. 

 Transitions have been recorded from, the Caucasus, N. Persia, etc. — Larva stout, tapering; head, prothoracic 

 and anal plates black or dark brown; greenish white or pale yellowish, sometimes with darker dorsal stripe. 

 In the seeds of yeOow rattle.. Pupa stumpy, yellow, hibernating in a stout cocoon, not rarely passing a second 

 winter. The moth flies in May and June and occurs in most parts of Europe and in Transcaucasia. 



maerens. C. tnaerens Siffr. Smaller than albidata, unicolorous dark (blackish) smoke-brown, the forewing with 



2 obsolete, scarcely recognizable lighter lines in the distal part, the underside, especially of the rather long hind- 

 wing, with inconspicuous darker discal lunules. Palpus strikingly longer and more densely scaled beneath than 

 in albulata. Described from Samarkand. I have before me an example from Transcaspia, in which the areole 

 seems to be single; if this be so, it is no Perizoma. 



flavo- C. flavofasciata Thrb. (= decolorata Hbn.) (10 h). Larger than most of the subgenus, distinguished 



fasciata. at once by the light sand-coloured markings. — Larva stout, tapering; head, prothoracic and anal plates 



brown; body dull reddish, in the middle of the dorsal area with a pale band; lateral stripe whitish; ventral 



area pale with small brown spots. The pupa hibernates. The moth flies in June and July; it has a pretty 



wide distribution in Europe and is also recorded from North Africa. 



Subgenus Hydriomena Hbii. (= Ypsipetes Steph). Moderate-sized moths. Face rather prominent, scarcely 

 tufted. Palpus stout, moderate or long cf antenna rather thick, minutely ciliated. Forewing with costal and 

 distal margins curved, apex squared, distal margin commonly shorter than hindmargin; areole double, 5"' sub- 

 costal generally arising from apex of distal areole, 2"'' subcostal near it. Hindwing with discocellulars strongly 

 biangulate. Larva stout, living in spun-up leaves. Biologically and in habitus one of the most natural subgenera 

 (or genera), better recognized by the pattern (basal patch minute, a subbasal line very oblique, no definite 

 median band or subterrainal line, etc.) than by any salient structural characters. The shape is generally distinctive. 



