PuU. 25. III. 1913. ACIDALIA. By L. B. Protjt. 65 



submutata. It is rather similar to certain weakly-marked forms of that species (and especially of Glossotrophia 

 confinaria) which lack the distinct dark discal spots, but the marginal line is quite different, being broken 

 into spots and not continued round the apex. Under surface rather well marked, that of the forewing smoky, 

 of the hindwing whiter. Only a single specimen is as yet known, a $ taken at Chia-ting-fu, W. China, in July. 

 The locality is scarcely within the Palearctic Region. 



A. incanata iy. ( = variegata ySco^J. = mutata Tr.) (4i). Although the early entomologists seem frequently incanaia. 

 to have confused this species with marginepunctata, there is really little excuse for so doing. The whitish 

 grey or cinereous ground-colour is always distmctive, the average size is considerably larger, the lines never 

 arise from dark costal spots and although their course is variable they are generally more regular ; in particular, 

 the postmedian line of the forewing does not bend markedly outward near the costal margin, but is either 

 approximately parallel to the distal margin throughout or merely makes a shallow curve proximad between 

 the radials. The subterminal line is of more uniform thickness throughout, sometimes nearly straight, at 

 other times more or less lunulate-dentate, but seldom, if ever, so deeply and irregularly as in marginepunctata; 

 the dark shading proximally to this line, whether weak or strong, is uniform throughout, while in margine- 

 punctata it oftener forms pairs of conspicuous spots. Forewing beneath grey, hindwing whitish; the latter, 

 generally better marked than in marginepunctata, the discal dot nearly always remaining sharply black, the 

 postmedian line generally distinct. — adjunctaria Bdv., described as a separate species from the mountains adjundaria. 

 of Lombardy and since recorded by Millie re from the Maritime Alps, is a darker grey form but apparently 

 not otherwise differing materially; Staudinger and Rebel doubt whether it is more than an aberration. There 

 is in most localities some variation between whiter and greyer forms and either may be more strongly or more 

 weakly marked. — The egg of incanata is laid upright and the upper (micropylar) end is a good deal broader 

 than that by which it is attached; the sculpturing consists of about 18 longitudinal ribs, converging in the 

 deep micropylar depression, and there are also finer and slighter transverse ribs. The colour is yellow at first, 

 becoming spotted with red. The larva is very slender, nearly cylindrical, whitish grey or yellowish grey ; first 

 5 abdominal segments with narrow elongate-oval dorsal markings, pointed at their extremities, bisected by 

 the dorsal line; dorsal stripe especially distinct on the posterior segments; each segment with a pair of dark 

 dots anteriorly and a pair in the middle at the anterior end of each oval. Feeds on thyme, Caryophyllaceae, 

 etc. The pupa is brown-yellow, the blunt cremaster bearing the usual armature. The moth appears in June 

 to July, or in its more southern stations in May with a second brood in August, and inhabits chiefly mountain 

 districts. It is distributed through the greater part of Europ3 (excepting the North-west and extreme North), 

 Asia Minor, Transcaucasia and Altai. 



■ A. grisescens 8tgr. (4 i) is closely related to incanata, with which it agrees in shape and markings. It is grisescens. 



considerably darker, of an almost uniform dark grey, the only distinct marking being the pale subterminal 

 line, though the lines and cell-spots are not absolutely obliterated. The forewing beneath is as above, the 

 hindwing paler with a moderately distinct postmedian line and cell-spot. The cj hindtibia is little thicken- 

 ed (less so than in incanata), the tarsus fully as long as the tibia. Local in Western Turkestan. 



A. bifalsaria nom. nov. (= falsaria Leech, nee H.-Sch.) (3 1, 5 e). Whitish grey with the lines tending to bifalsaria. 

 form, or to be accompanied by, darker bands, particularly the postmedian, which is followed by a character- 

 istic brownish-tinged band reaching to the pale subterminal line. The first line or band does not reach the 

 costa, and is wanting on the hindwing; the second (the median shade) is bent near the costa of the forewing, 

 then fairly direct, crossing the cell-spot on the hindwing. Both wings with black discal dot and distal mar- 

 ginal line. Hindwing beneath paler, both wings with indistinct discal dot and postmedian line. Hindtibia 

 in (J thickened. The antennal ciliation in the (J is longer than in the two preceding species, the forewing slightly 

 less pointed, the hindwing with distal margin slightly bent in the middle. A more brownish admixture further 

 distinguishes it from similarly marked forms of incanxita. Inhabits several localities in Western China, occurring 

 in June and July. 



A. frigidaria Moschl. (= impauperata Walk. = defixaria Walk. = okakaria Pack.) (5 b). Recognizable frigidaria. 

 by its rather broad, relatively short wings, their glossy texture, strong dark powdering and weak markings. 

 From the dark forms of ternata Schr., to which otherwise it would most nearly approximate, it differs in the 

 structure of the hindleg of the (J, the tibia being entirely without spurs, although the tarsus is not shortened. 

 Antennal ciliation in the cJ of medium length. Forewing with inner line rarely discernible. Both wings with 

 median shade rather thick, little darker than the ground-colour; outer line usually more distinct, nearly paral- 

 lel with the distal margin. Underside less densely dusted, especially on hindwing. Originally described from 

 Labrador. I have seen no Palearctic examples, but it is said to occur in Kamtschatka, in a form still more 



IV 9 



