DEETHISA. By W. Warren. 119 



U. hirta Hbn. (20(1). Porewing olive-fuscous or olive-rufous, speckled with black; the veins, a costal hirta. 

 streak, the two lines, and the stigmata paler, sometimes whitish; the lines broadly whitish, conversely black- 

 edged, the outer bent on vein 6, then oblique to middle of inner margin; claviform stigma large, often promi- 

 nently pale; the orbicular and reniform small, flattened, with dark centres and pale black-edged annuli, the 

 orbicular sometimes a pale point only; submarginal line pale, preceded by a dark band, often containing black 

 teeth between the veins, and followed by a paler area; hindwing fuscous or rufous grey, with traces of a dark 

 outer line. The $ is ochreous brown tinged with fuscous. S. France, Sicily, Dalmatia, Eumelia, Bulgaria, and 

 S. Russia; Algeria; Armenia, Asia Minor, Syria. — ■ Larva bone colour; dorsal and subdorsal lines yellowish, 

 slender; spiracular line yellow, broad; head yellowish; feeding on grasses. 



Sect. II. Wings of $ partially aborted, the costa arched and fringed with hair. 



U. scillae Chret. Forewing purplish fuscous; median area ochreous white on costa and inner margin; scillae. 

 outer area purplish red; veins of median area pale ochreous; inner and outer lines blackish, double, filled in with 

 ochreous, the inner strongly curved; claviform stigma large and dark; orbicular round, purple, with black outline; 

 reniform ochreous, containing a white line on discocellular, edged with black, angled inwards on median vein: 

 the cell dark; hindwing brownish ochreous, darker towards termen, with dark curved outer line; $ forewing 

 redder; the median area redbrown throughout; veins without pale streaks; reniform stigma redbrown; sub- 

 terminal line pale, with a series of whitish points; terminal area redbrown. Bone, Algeria. — The ab. datini dalini. 

 Obcrth. (28 c) has the forewing much paler; brownish ochreous, with a slight fuscous suffusion; the inner line is more 

 oblique from costa to submedian fold; claviform stigma paler; orbicular and reniform ochreous with black out- 

 lines, and confluent on median vein; the outer area brownish ochreous; hindwing ochreous white, suffused 

 with brown only along termen. Tunis. 



20. Genus: Derthisa Wlk. 

 Tongue absent; palpi obliquely porrect, hairy beneath, 3rd segment short; vestiture hairy; differs 

 from the two preceding genera in the frons being slightly rounded and roughened in front; wings of $ equally 

 developed as of £. The imagos are inert in habit, flying little, and only at midnight; the larvae hybernate 

 and feed up in spring, the perfect insect emerging in autumn; they feed on plants of the order Liliaceae. 

 Type Derthisa trimacula Schiff. 



In the first 4 species the upper stigmata are large and extend below the median vein. 



D. sareptana Alph. (29 e). Forewing grey brown with darker dusting and with a slight reddish tint; sareptana. 

 inner and outer lines thick, blackish, conversely edged with pale; cell deep brown; upper stigmata large, grey, 

 the orbicular confluent below cell with another pale mark; submarginal pale, preceded by a faintly darker shade, 

 more marked on costa; hindwing brownish white, darker along termen. — Sarepta, S. Bussia. The species 

 may be distinguished by the dark brown head and thorax contrasting with the paler abdomen. 



D. trimacula Schiff. (29 e). Forewing brownish-grey, dusted with darker; median area more or less trimacula. 

 suffused with dark fuscous except along costa and inner margin ; a dark streak from base below vein 1 ; the cell 

 always darker; the stigmata large, of the pale ground colour, reaching below the pale median vein and confluent 

 with a large blotch along vein 2; lines dark, wide apart; the inner obliquely curved, the basal area within it 

 pale; the outer oblique and sinuous from 4 , '5 of costa; submarginal line indistinct, denoted by difference of tint 

 merely; fringe broad, concolorous; hindwing dull grey; — hispana Bsd. (= meridionalis Calb.) (29 e) is a fiispana. 

 large pale grey form with a bluish tinge, with the pale stigmata and veins well developed ; — dentimacula Hbn. (29 e) dentimacala 

 is a small form; pale stone grey in tint, with the dark suffusion confined to the edges of the inner and outer lines 

 and to the cell, where it forms dark spots on each side of the orbicular; — glaucina Esp. (29 f) is a more or less glaucina. 

 uniform rufous insect, with the dark markings greyish olive and indistinct; — tersa Schiff. (29 f) is pale yellowish tersa. 

 or ochreous, with all the dark markings obsolete except the dark blotches in cell on each side of the orbicular; 

 gruneri Bsd. (= albida Oberth.) is the same form with a white ground colour, found in Sicily and Morocco; gruneri. 

 tersina Stgr. seems to be the same, but with the ground colour grey; in unicolor Dup. (29 f) even these marks tersina. 

 have disappeared and the insect is wholly pale yellowish or ochreous. Generally distributed in S. Europe; 

 occurring also in Algeria and Morocco; in Armenia, Asia Minor, and W. Turkestan. — Larva grey brown, with 

 a violet sheen; dorsal line pale, indistinct; spiracles black; thoracic and anal plates shining dark brown; feeding 

 on Muscari racemosum, Anthericum liliago, and Ornithogalum. 



D. lederi Chr. (29 f). ^ Forewing pale grey' with a luteous tinge; the lines black, interrupted by the lederl. 

 veins, the inner followed, the outer preceded by brownish fuscous scaling; the cell brown; stigmata of the 

 ground colour, large, and reaching below the median vein; veins paler across the dark tints; hindwing luteous 

 whitish. $ darker, suffused with brownish fuscous, the median area darker; hindwing brownish grey; — ab. 

 discors Stgr. (= declinans Stgr.) is more ochreous in the $ with less defined stigmata, the brown suffusion discors. 

 in median area absent; the lines less plain; the fringe rufous; the $ is whiter, with indistinct markings, the 

 hindwing whitish tinged with brown; — in rubellina Stgr. the forewing is uniform reddish; in concors Stgr. nearly ™^" ,a ' 

 wholly whitish. An Eastern species, occurring in Asia Minor, Armenia, Palestine, Transcaucasia, and 

 W. Turkestan. 



