POLIA. By W. Warren. 71 



P. contigua Vill. (= ariae Esp., spartii Brahm, dives Haw.) (16 d). Forewing pale ashgrey, suffused contigua. 

 with olive brown ; a black streak from base below cell, with a pale costal blotch above it ; claviform stigma 

 dark, followed by an ochreous white patch at base of vein 2; orbicular stigma whitish, with grey centre, 

 forming with the pale patch beyond claviform and a large pale blotch on inner, margin beyond outer line 

 a kind of oblique pale bar; reniform with lower lobe blackish, followed by a fulvous tinge; submarginal 

 line strongly dentate, the teeth on 3 and 4 reaching margin; hindwing whitish grey, the veins and termen 

 darker. — Found in Britain, France, Spain, Italy, Germany, and Russia; also in Armenia, E. Siberia, and 

 Japan. — The form subcontigua Ev. (16 d) is a dark suffused insect, without the pale patches, from the Ural 

 Mts. in Russia, but similar examples occur in other parts; - ab. amurensis Spul. from Amurland is more subcontigua. 

 delicate in the outlineo f wing, reddish grey in colour, with the markings less distinct. Larva dull yellowish 

 green, mottled with orange and reddish brown; dorsum with a row of dark V-shaped markings; spiracular amurensis, 

 line reddish brown; feeding on birch. 



P. genistae Bkh. (= dives Bon., rectibnea Haw.) (16 d). Differs from contigua in having no pale genistae. 

 blotch at base of vein 2, or on inner margin beyond middle; pale pearl grey, or brown grey, or purplish 

 brown; median area dark brown; a pale blotch at base of costa, a black streak from base below median 

 vein, and another below claviform to outer line; upper stigmata large and pale; space between outer and 

 submarginal lines forming a pale fascia; hindwing dull grey, darker towards termen. General throughout 

 Europe, also occurring in Armenia, Persia, Turkestan, and Siberia. — Larva brownish yellow, or grey, or 

 greenish; dorsal line dark with pale central thread; a row of dark V-shaped marks along dorsum; head 

 yellow green with two dark lines. On numerous low plants; feeding up in summer. 



P. thalassina Bott. (= gemina Hbn. part) (16 e). Differs from the two preceding species in having thalassina. 

 no pale grey tints; the red brown ground colour varying only to dark grey; the claviform stigma is produced 

 as a dark dash to outer line; upper stigmata pale with partial black outlines, a black basal streak with pale 

 patch above it; hindwing pale fuscous, paler at base; the form achates Hbn. (16 e) has the forewing uniform achates. 

 red brown; while humeralis Haw. (16 e) is fuscous grey with the red tints absent; ab. nigrifusa nor. (16 e) humeralis. 

 is wholly suffused with black, the orbicular stigma and traces of outer and submarginal lines remaining pale nigrifusa. 

 gre} r . Larva green or reddish yellow, with two dark oblique stripes ou each segment, with 2 dark spots or 

 blotches in front of them; lateral lines pale grey with red edges; on numerous low plants. 



P. altaica Leal. (16 f). Forewing grey, shaded with greyish fuscous and powdered with black; inner altaka. 

 and outer lines fuscous with pale edging; submarginal line whitish, generally with dark shades on each side, 

 the teeth on veins 3 and 4 reaching margin; stigmata with black outlines, the claviform dark grey, the two 

 upper pale grey; hindwing fuscous, darker towards termen; the fringe pale. A large species, with long 

 narrow wings, having a powdery appearance, somewhat like a grey brassica; occuring in Siberia, Turkestan, 

 and Mongolia. 



P. dissimilis Enoch. (= leucographa Esp., dens-canis Haw.) (16 f). Forewing uniform dull red brown, dissimilis. 

 with all the markings obscured, even the black basal streak sometimes obsolete, as well as the usually plain 

 pale submarginal line with its two sharp teeth on veins 3 and 4; hindwing dull fuscous, paler towards base 

 with the veins darker; the form suasa Bkh. (- aliena Dnp. nee Hbn.) (16 f), the commonest of all, is pale leather suasa. 

 brown, with distinct markings, a black basal streak, blackish claviform stigma, a dark cloud at lower end 

 of cell, and black marginal area; the upper stigmata paler; of this laeta Beuter (16 g), from Scandinavia, la-eta. 

 Finland, and the Baltic coast, but occurring also elsewhere, is an extreme form, showing a pale patch at base 

 of costa and black wedgeshaped marks preceding the pale submarginal line; w-latinum Esp. nee Hfngl. (16 g) w-latinum. 

 resembles the type form in obscurity of markings, but is brownish grey instead of reddish; confluens Ev. confluens. 

 (=? pavida Guen. nee Boisd.) (16 g) is the darkest form of all, being entirely blackish fuscous, with the 

 markings just outlined and the submarginal line sometimes broken up into dots; a pale greyish-red form 

 from Turania, ab. turanica Spul, has the markings more or less obsolete, but the submarginal line distinct; turanica. 

 finally extincta Stgr. from Amurland is also a dark form with the pale markings yellow instead of white, extincta. 

 The species occurs throughout Europe and in Siberia, and the Amur district in Asia. Larva reddish yellow, 

 dotted with white and dark grey; dorsal and subdorsal lines grey, the last obscured by dark streaks; lateral 

 lines yellow with blackish edges; feeding on all kinds of low herbage. 



P. aliena Hbn. (— permixta H. G.) (16 g). Forewing grey brown, in some cases reddish-tinged; the aliena. 

 lines and upper stigmata paler, the latter with grey brown centres; claviform dark, with a slight pale patch 

 beyond it; submarginal line pale, with the teeth on veins 3 and 4 not reaching margin; a slight dark streak 

 from base below cell; hindwing fuscous. Widely distributed in Europe, though not found in Britain; also 

 in Armenia, Siberia, Turkestan, and Japan; — the* ab. amurensis Stgr., from Amurland and Japan, is markedly amurensis. 

 darker. — Larva yellow brown; dorsal and subdorsal lines conspicuously dark; spiracles white edged witli 

 black, lying on a dark lateral shade; venter and feet greenish grey; head and thoracic plate yellowish green: 

 feeding on low plants. 



