Pnhl. 25. r. I'jjs. HYPOOHROSIS; OSIOERDA; PLAGODTS. By I.. B. Prout. 337 



T, citrina Warr. (= praetoraria Hmpsn. nee Feld.). Coloration of delectans Btlr. (17 e) or with citrina. 

 more yellow, markings almost as in crocoptera, postmedian line rather more sinuous, subterminal marked with 

 shallow dark lunules between the veins. N. India and Omei-shan. 



T. delectans Btlr. (17 e). On an average somewhat smaller than crocoptera, much less mixed with delectans 

 orange, the pale costal area of forewing broad, violet-grey (not white), weakly irrorated, both wings much 

 clouded (but very variably) with slightly darker violet grey, an oblique yellow postmedian band or patch bet- 

 ween the 3rd radial and 2nd submedian of the forewing and an antemedian patch on the hindwing. Japan 

 to W. China. — ab. marginata Warr. is somewhat smaller and has the yellow margins free from dark irrora- maryinaia. 

 tion. W. China. 



67. Genus: Sypochrosis Gum. 



Scarcely separable in structure from Osicerda, distal margin of forewing not bent in the middle; typi- 

 cally the 1st subcostal is connected by a bar with costal while in Osicerda it oftener anastomoses, but both 

 genera vary in this respect. Hindwing concolorous with forewing, underside less unicolorous than in Osicerda. 

 An Indo- Australian genus; the species here described, with longer palpus, is perhaps not strictly congeneric. 



1 H. mixticolor spec nov. (17 g). Face fuscous. Palpus of moderate length, porrect, reddish, darker mixticoJor. 



above. Vertex of head pale. Forewing with 1st subcostal anastomosing with costal. Coloration of upper- 

 side nearly as inpulchraria Rothsch., rather more mixed with reddish, the green less decided, much more restricted, 

 ill-defined proximally, followed distally by some paler olivaceous shading; a minute dark cell-dot placed beyond 

 middle of wing, the cell being rather elongate; a sinuous dark postmedian line bounding the green shade. 

 Hindwing with rather larger celldot and vague grey lines and shades. Underside very variegated; forewing 

 basaUy orange spotted and clouded with purple grey, the rest of the wing predominantly purplish, with 

 some remnants of the orange ground, especially subterminaUy between the 3rd radial and 2nd median; 

 hindwing more largely orange yellow, the purple mottlings and cloudings strongest anteriorly and apically; 

 both wings with cell-dot and traces of postmedian line, on the hindwing forming black spots at costa and near 

 inner margin. Omei-shan, August, type (cj) in my collection. 



68. Genus: Osicerda Walk. 



Characters of Plagodis, but with the face rather smoother and less prominent, the antenna in both 

 sexes bipectinate, forewing and generally hindwing with the 1st discocellular much longer, 2nd discocellular 

 of hindwing commonly more oblique. An indo-Australian genus, which scarcely reaches the Palearctic Region. 

 Colouring generally still brighter than in Plagodis, under surface as a rule uniform bright orange. Gxjenee 

 and Hampspon wrongly call this genus Prionia Hhn. 



0. rosearia Leech (17 g) is distinguished by the strong rosy suffusion of the upper surface and the rosearia. 

 fairly regular yellowish lines. Distributed in E. China and Formosa. 



0. paupera Btlr. is the dullest coloured species, pale drab above, slightly more ochreous beneath; paupera. 

 the black costal spots present on the upper side only. Japan. 



0. berytana Ebl. is reddish violet-grey, with transverse rows of dark scales, the costal spots of herytana. 

 the forewing quadrate, olive-brown, more distinct rows of blackish scales running from them; fringes olive- 

 brown. Beyrout, one example, April. Unknown to me. 



69. Genus: Plagodis Hhn. 



Face and palpus shortly rough-scaled, the latter rather short or moderate. Antenna in ^ generally 

 bipectinate, in $ simple. Femora scarcely hairy. Forewing elongate, elbowed or toothed at end of 3rd radial; 

 1st subcostal sometimes arising from 2nd, always anastomosing or connected with costal. Hindwing npt broad, 

 distal margin usually sinuous. Larva with head rather small, notched; thoracic segments and 5th ^b,domiral 

 swollen dorsaUy. A small genus, but found in the Palearctic Region, N. India and North America. All the 

 species are, more or less, similarly coloured. 



P. dolabraria L. (= ustulataria Hujn.) (17 g). Forewing with innumerable fine, slightly oblique, dolabraria. 

 transverse striae, no distinct lines ; the postmedian on both wings indicated by a thick dark fuscous shade 

 posteriorly, distally to which (especially on hindwing) there is defined an iU purplish blotch reaching to the 

 hinder angle. — ab. atrox Zerny is a melanotic form, forewing mostly dark chestnut brown, towards the base atrox. 

 and hinder angle black. — Larva twig-like, brownish, somewhat variegated, thorax darker dorsally, hump on 5th 

 abdominal and a transverse mark near the tail also dark. On oak, birch and sallow, the pupa hibernating. 

 Moth in May — June, Central and E. Europe, Transcaucasia, S. E. Siberia and Japan. 



IV 43 



