250 



CIDARIA. By L. B. Prout. 



segments show also oblique longitudinal streaks running laterally. It feeds on various species of Galiiun and 

 is said to hibernate. The moth is double brooded. 



trianguli- C. triangulifera Moore (8e). This species and the 9 which follow, together with some Indian species, 



fera. probably form a biologically natural genus more nearly related to Lygtis or Eustroma than to Cidaria. The 

 face is generally broader and smoother, the palpus longer, with 2"'' joint rougher-scaled above and 3"* joint 

 distinct, sometimes longer, the anastomosis of the costal vein of the hindwing on an average shorter, the cf 

 abdomen rather slender, with light dorsal line or stripe, the wings smoothly scaled, with different pattern, in 

 particular with some wedge-shaped or oblong dark markings in the subterminal area of the forewing recalling 

 fhose of Lygris pnmata. triangulifera is characterized by the form of its median band. Dharmsala to Assam. 



demirrens. C. decurrens Moore (=z oblongata Wall: nee Guen^ is distinguished by its very oblique white face, 



which ends in a pointed tuft, long palpus, rounded forewing, with intricate pattern of fine, very oblique white 

 lines on the median area, two fine lines beyond, meeting at costa, fine white line from apex, crossing an 

 equally fine white subterminal about the P' radial vein, and especially by having the entire distal area from 

 the 3'''' radial to the hindmargin whitish, clouded with yellowish and ferruginous; only at the distal margin 

 itself the fuscous ground-colour reappears as interneural streaks. Hindwing grey with a pale line (sometimes 

 indistinct) quite near the distal margin, otherwise almost or altogether unmarked. Under surface paler, but 

 still not so pale as in silaceata; forewing with the markings of the distal area faintly showing through; hind-^ 

 wing with a postmedian line nearly as in silaceata and a discal dot, usually smaller than in that species, distal 

 area weakly marked. Antenna scarcely ciliated. N. India, Central and W. China and Japan, May, June and 

 August. 



ilUtata. C. illitata Wileman, of which only the type specimen is known, is probably an extraordinary aberration 



of decurrens, certainly a very close ally. Forewing in proximal half fuscous (irregularly bounded), with two 

 short white streaks at costa; distal area anteriorly as in decurrens, in the middle with a long whitish blotch, 

 which reaches right to the cell, posteriorly with thD ferruginous colour rather more extended proximally. Ohoki, 

 lyo, Japan, taken in May. 



capitala. C. capitata H.-Sch. (= balsaminata Frr., mariesii Btlr., pryeri Btlr.) (10 k). Very near silaceata, 



on an average somewhat smaller, slightly rounder-winged (intermediate towards decurrens), thorax (except the 

 tegulae) and abdomen pale ochreous dorsally, the dark markings of the forewing on an average darker, median 

 band never white-intersected on the veins, its proximal margin less deeply angulated, posterior half of distal 

 capitulala. area weakly marked, and with some light ferruginous clouding somewhat recalling that of decurrens. — capitu- 

 lata Stgr. is smaller, the distal area of the forewing duller, dirty grey, not brownish; subbasal area and hind- 

 wing also somewhat darkened. Amur and Ussuri districts and as an aberration in Japan (Hakodate). Butler's 

 type of mariesii is somewhat transitional. — Larva closely similar to that of the following species, perhaps 

 rather more slender, but I know of no certain distinction. On Irapatiens. Pupa brown with dark markings 



hibernating. 



Imago in April — May and in August, local in Central Europe and Japan. 



silaceata. C. silaceata Schiff. (= posticata F., cuneata Don., albolineata Pack). We have neglected to figure 



the name-typical form of this species, which, however, only differs from the ab. insulata in lacking the white 

 veins on the median area, cf antenna, as also in the preceding species, with minute ciliation. Thorax dorsally 

 insulata. more mixed with fuscous than in that species, abdomen dark-spotted, with pale central line. — ab. insulata 

 Haw. (101, as silaceata). The median veins, which even in the type-form are usually white at the distal edge 

 of the median band, are here while right across it, sometimes narrowly, sometimes more broadly; at times also 

 the 3'''* radial is white. Ab. insulata occurs chiefly in the first generation, the name-type chiefly in the second; 



umbrosaria. hut the variation is not entirely seasonal. — umbrosaria Motsch. (= deflavata Stgr) (101, as deflavata) 

 is a darker form, chiefly, if not entirely, alpine and boreal, with the blackish brown colour predominant, not 

 being mixed with brownish or yellowish scales. In extreme examples the thorax and abdomen are wholly 

 fuscous. Pyrenees, Alps, Lapland, the mountains of Central Asia, Dhaiiiisala, Japan, etc. Perhaps intergrades 

 oblongala. with the following. — oblongata Guen. (= substituta Walk., ? subfalcata Wurr.). On an average larger, 

 somewhat longer-winged, distal margin of forewing perhaps straighter, colour intermediate between the type 

 and umhrosaria, band of forewing more deeply indented distally on the median veins, hindwing shining whitish, 

 the grey shade at inner margin restricted; underside less pale than in the pale-hindwinged European examples. 



angustaria. N. India and Tibet. — angustaria Leech, from Pu-tsu-fong, is even longer-winged, the forewing very dark, with 

 whitish veins as in insulata, the hindwing glossy, mixed white and brownish-grey, more sharply marked than 

 the other forms. — Larva long and thin, variable in colour, green or flesh-colour, thoracic and last 4 abdominal 

 segments with red or blackish mediodorsal line, the middle segments with blackish dots, venter with white line, 

 sometimes pink-edged. On Epilobium, Circaea and Impatiens. The pu|)a hibernates and is compact, brownish 

 green, marked like those of Lygris. The moth appears in May — June and (except in northerly localities) again 

 in August. Central and N. Europe, with local forms in Asia. 



