AOIDALIA. By L. B. Prout. 55 



also occurring in Korea; April and again in July. — ab. unicolor ab. nov. lacks the median line and is reddish unicolor, 

 throughout, the discal spots and distal line not prominent. 



stalked 



ternata-group. 



Palpus short. (J antenna with short or quite moderate ciliation. Hindwing with second subcostal not 



A. ternata Schrank (= ? graminaria Fisch.-Rossl. = fumata Steph. = commutata Frr. = saltuata ternata. 

 Spy. = nitidaria Bdv. = gypsaria Bdv.) (4i). Whitish grey with a slight tinge of yellowish or brownish and 

 with dense biit fme blackish irroration. The transverse Imes (on forewing 3, on hindwing 2) usually only 

 slightly darker than the ground-colour, sometimes browner, sometimes greyer, the outer sometimes a little 

 less indistinct than the others, occasionally even quite prominent. Hindwing with distal margin almost regu- 

 larly rounded, only very slightly bent at the end of the third radial. Under surface of forewing more or less 

 infuscated, of hindwing whiter. The $ is smaller than the S, usually rather more yellowish and better 

 marked. — In ab. simplaria Frr. the lines are more distinct, being darker while the ground-colour is as a rule simplaria. 

 less densely irrorated. Beneath the forewing is little or not infuscated. — perfumata Renter is the name which perfumata. 

 has been given to the darker, fuscous-grey specimens which inhabit parts of North Finland and Sweden, but 

 in other circumpolar localities the form differs little from that of Cexitral Europe and it is perhaps not truly a 

 local race. — The species inhabits chiefly mountains or high-lying heathland and is one of the very few 

 Acidaliids which extend into the Arctic regions. In Northern Europe it is of general distribution, in Central 

 Europe more local; its most southerly locality is the Western Pyrenees, further eastward the Alps and Carpa- 

 thians, then the Ural and Altai. It is said to occur also in Amurland and possibly Japan, but the specimens 

 which I have seen from those countries are not true ternata. The egg is nearly cylindrical, both ends being 

 somewhat flattened. It is usually laid on one end, with the micropyle at its apex. Finely ribbed longitudinally, 

 with 17 or 18 ribs, the deep furrows crossed by 14 to 18 very much slighter ribs; the flattened micropylar 

 end strongly pitted. When first laid it is of a pearly-yellow colour, but after a few days it becomes irregu- 

 larly spotted or blotched with crimson. The larva is very slender and elongate, nearly cylindrical, with a di- 

 lated lateral skinfold, the segment-incisions not deep, but the subsegmentation well-marked, about 14 — 16 

 subsegments to a segment. The colour is light brown, with a dark dorsal stripe; spiracles black. It feeds on 

 bilberry and probably on Calluna, Erica, etc., and hibernates nearly full grown or (according to Milliere) 

 small. Milliere has figured but not described the pupa. The moth flies in June and July and is easily started 

 up by day, but flies chiefly at dusk. It is usually plentiful where it occurs. 



A. praecanata Stgr. (3 1) has the forewing rather more pointed than ternata, in this respect, as well as in praecanatai 

 its colder grey colour, rather recalling A. incanata L. Further differs from ternata in the longer cilia of the 

 (J antenna. The dark transverse lines are rather straight, the inner and median weak or wanting, the pale sub- 

 terminal distinct. Underside of forewing infuscated, of hindwing whitish grey with blackish irroration; the 

 postmedian line the most distinct. The $ is unknown to me. The species was discovered by Rijckbeil in 

 the Koko Nor district in 1892—93. 



A. ansulata differs from ternata in shape and markings, though agreeing pretty closely in structure. 

 The forewmg is narrower, its distal margin being more oblique and less convex; the hindwing is more irregularly 

 shaped, the bend at the end of the third radial more pronounced, preceded by an excision (though sometimes 

 in the ^ very slight) between the first and the third radial. The lines are finer, well-defined and less regular, 

 and discal spots are present on both wings, that of the forewing enlarged into a ring. — ■ ansulata Led. from ansulata. 

 Persia has the ground-colour rather strongly dusted with brown, the lines of the forewing all bent or angled 

 near the costa, a brown shade midway between the outer line and the distal margin, the ringspot on the 

 forewing large. Under surface of forewing more strongly mixed with brown, of hindwing whiter, the forewing 

 without the first line and with the cell-mark reduced to a normal dark spot. — adulteraria Ersch. (41) differs adulteraria. 

 not only ia being of an ochraceous or rosy colour and less dusted, but also in the absence of the submargnial 

 band and in having the middle and outer lines of the forewing not or scarcely bent near the costa and the 

 ring-spot much reduced in size. It may well be a separate species, but I have too Kttle material before 

 me on which to bass an opinion, as ansulata is said to vary somewhat in the lines and spots. Western Tur- 

 kestan from the Caspian Sea to Ferghana. — characteristica Alph. was regarded by Christoph as a synonym characieris- 

 of adulteraria, and agrees with it except in the ground-colour, which is pale like that of ansulata, only without ^'"'"■ 

 the brown dusting. In some localities it flies with adulteraria, and might be regarded as an aberration, but in 

 other places, accordmg to Staudinger, it seems to form a local race. Zerafshan to the Hi district. 



