Publ. 20. VIII. 1913. PLUSIDIA; CHRYSOPTERA. By W. Warren. 357 



P. intermixta spec, nor. (64g). This species bears a very close resemblance to orichalcea F., with intermixta. 



which it has been hitherto confused; but the forewing is broader, with the l.ermen less oblique; the outer 

 and subterminaJ lines more strongly expressed; the brassy wedge shaped projection not reaching inner line, 

 and bluntly rounded at extremity: the orbicular stigma oblique, long and narrow. The species occurs in 

 China and Japan; also, along with orichalcea F., in India and the Malay Islands to Australia. 



5. Genus: Plusidia Btlr. 



Tongue well developed; irons smooth; palpi upturned, the second segment large and roughly haired 



below, the third shorter; forewing with bluntly rounded apex; foretibiae heavily fringed with hair externally, 



the others smooth ; forewings without metallic markings, but with dark basal and apical blotches. Type : 

 P. cheiranthi Tausch. 



Sect. I, Palpi less strongly developed. 



P. cheiranthi Tausch (= eugenia Ev., abrostoloides Btlr.) (65 g). Forewing pale grey brown with a pink cheiranthi. 

 Hush and some fine brown striae; a deep chocolate brown blotch beyond subbasal line from costa to vein 1, and a 

 thick bar of the same colour from base of wing to inner line below vein I ; inner and outer lines finely brown 

 double, tilled in with pink, below vein 1 with white; the inner bent on subcostal vein, then incurved; the 

 outer obliquely curved outwards to vein 6, there angled and shortly incurved, then straight to inner margin, 

 followed at costa by a dark chocolate brown hook-shaped mark and a paler brown apical blotch, separated 

 by the pale curved subterminal line, which is interrupted below the hook and then vertically waved to inner 

 margin, preceded by an olive cloud; a dark brown marginal line; veins and outlines of stigmata finely brown ; 

 the orbicular conjoined to a similarly shaped blotch at base of vein 2; a slight diffuse median shade; hind- 

 wing luteous fuscous, with a pale median band; a rare form, ab. obscurata Spul. (65 h) has both the median obsmrata. 

 and outer fields darkened. Larva green, with dorsal humps on segments 4 to 11; the thoracic segments with 

 three white dorsal lines and a white lateral line, which are enlarged on the remaining segments to oblique 

 white streaks; spiracles white in black rings; head green; feeding on Thalictrum and Aquilegia in spring. In 

 Europe the species occurs in N.E. Germany, Silesia, North Hungary, Galicia, St. Petersburg and the Ural Mts. 

 in Russia; and in Asia, in Armenia, the Altai Mts., Mongolia, Amurland and Japan. 



Sect. II. Palpi more strongly developed. 



P. separanda spec. nov. Slightly larger than cheiranthi, more rosy pink, the dark chocolate brown, separanda. 

 blotches replaced by olive brown and green; the outer line is more bluntly angled below costa, the shade 

 bevond broader. Ichikishiri, Yesso. 



6. Genus: Chrysoptera Latr. 



Closely allied to Phytometra Haw., but the palpi are much larger and longer, reaching well above head, 

 and clothed with long rough hair. The larva also, that of moneta F. certainly, seems to differ in habit, feeding up 

 in spring and early summer (? without hybernating) in the unopened flower shoots. Type: C. C-aureum Knock. 



C. C-aureum Enoch (= concha F.) (65 h). Forewing grey brown with dark brown lines and shading; C-aureum. 

 the apex and termen below middle, and a patch on inner margin before outer line pale golden; inner line 

 double, dark brown, angled on subcostal and curved below middle, preceded by a brown band which below 

 costa contains a golden dash; outer line double, dark brown, oblique outwards and angled on vein 6, then 

 incurved; stigmata dull brown with dark outlines, the reniform emitting a dark diffuse streak into the angle 

 of outer line: median shade dark brown; an obscure dark edged mark at base of vein 2, containing on its 

 lower edge a golden C; submarginal line waved, obscure; hindwing pale fuscous, with dark median line and 

 terminal border. Larva pale green; segments 5, 6, 7, 10, 11, somewhat swollen in front; on segments 4 to 

 10 the pale tubercles stand in two triangular dark green spots edged with pale yellow, which on segment 11 

 become coalescent: lateral line broadly white; feeds on Thalictrum and Aquilegia. Occurs in Finland and 

 South Scandinavia, throughout North and Central Europe, N. Italy, Hungary, and S. Russia, the Ural Mts., 

 Armenia, the Altai Mts., the Ussuri district, Amurland, and Japan. The form found in this last locality, - 

 mikadina Btlr., has the golden patches all paler, the C-mark larger, the outer line more deeply sinuate, mikadina. 

 and the golden patch bounded by it on inner margin much broader; the discoidal spots narrower and 

 more angular. 



HI 46 



