2 20 European Butterflies and ^Tot/is. 



a slight and obtuse W ; liind-w iiiLjs dark grey, lighter at the base, with a dark zigzag angulated 

 line. There is also a grey variety, varied with whitish, called Xantliocyaiiccx (Hiibn.). Expands 

 about \\ inches. Widely distributed in Central and Eastern Europe in May. The larva feeds 

 on Si/eiie nutans in July and August. 



3. D. Tcphroleiica (Boisd.). — Resembles Filigranuna ; fore-wings olive-brown, varied with 

 bluish-white, but not dusted with yellow ; the transverse lines bordered with whitish, the sub- 

 terminal line better defined, with blacker and sharper arrow-heads in front, and the orbicular 

 stigma small, round, surrounded with black, and with a brown centre ; hind-wings as in Fili- 

 granima. Expands about i^ inches. A scarce species, found in Switzerland, Piedmont, and the 

 Pyrenees in July. 



4. D. Magiiol.'i (Boisd.). — Fore-wings dark olive-brown, dark grey in the central area and 

 before the hind margin ; the transverse lines are black, single, sharply dentatcd, and narrowly 

 bordered with white ; the subterminal line is sharply white, slightly zigzag, and spotted with 

 black in front ; the two stigmata have brown centres and are surrounded with black, and the 

 orbicular stigma is small and round; hind-wings as in Filigranima ; thorax varied with white. 

 Expands from I J to \\ inches. Tlie larva, which resembles that of Albiniacnla, feeds on 

 Silcne nutans in August and September. {D. Conspnrcata, Freyer, from South Russia and 

 Siberia, has brown fore-wings, with an ochreous spot at the base, and the transverse lines 

 ■Waved ; the borders of the stigmata and a row of marginal dots are white. E.xpands about 

 1^ inches.) 



* 5. D. Albiuiaciila (Borkh.). — Fore-wings olive-brown, with single sharply-dentated black 

 transverse lines, narrowly bordered with white, and a fine white zigzag subterminal line spotted 

 with black in front ; the orbicular stigma and an angulated spot beneath it white, the former 

 with a brownish centre ; hind-wings yellowish-grey, with the hind margin brownish ; the thora.x 

 varied with whitish. Widely distributed in Europe and Northern and Western Asia in May, 

 but not common. The larva is pale reddish-grey, with a dark macular stripe on the back, 

 transverse stripes projecting forwards, and a pale stripe on the sides. It feeds on Silene nutans 

 in July and August. The transformations are figured at PI. 37, Fig. 5, a—c. 



* 6. D. Barrcttii (Doubl.). — Fore-wings brown, with a pale spot at the base, and a broad 

 oblique interrupted pale band running from the middle of the costa to the hinder angle. 

 Hind margin pale, bordered by the indistinct paler subterminal line, which forms a rather 

 obscure W towards the hinder angle. The transverse lines are indistinct, but connected by a 

 very distinct black line, emitting a branch which divides the oblique pale fascia into two 

 unequal parts, of which the upper is the larger ; the fringes are spotted with brown and white. 

 The stigmata are indicated by two pale spots, but the markings of the fore-wings are much 

 obscured by their being dusted all over with brown. Hind-wings brown, with a paler curved 

 line. Expands from 1} to 1^ inches. It is found on the sea-slopes of the Hill of Howth, near 

 Dublin, in June, flying over Silcne. The larva is flesh-colour, with a paler shining plate 

 behind the head. It feeds in the roots and occasionally in the seed-capsules of Silene 

 viaritiina from July to September. This insect is now believed to be a local form of D. 

 Lutcago (No. 17, injra). 



* 7. D. Conspcrsa (W. V.). — Fore-wings dark grey, with dark double slightly-dentated 

 transverse lines, and a white zigzag subterminal line, which widens into a large spot at the 

 tip; the large orbicular stigma and the angular spot beneath it pure white; hind-wings as in 

 Albiiiiacitla ; thorax much varied with white. Expands about \\ inches. Common in Europe 

 and Northern and Western Asia from May to August. The larva is yellowish-grey, with a 



