PROXENUS. — MESOTROSTA. 437 



4130. Proxenus tristis. (Plate CXXXIII. fig. 2'3.) 



Can,, I, -inn tristis, Brein. Lep. Ost-Sib. p. 49, pi. 5. f. 9 (1801) ; Staud. Cat. 



Lep. pal. p. 198. 

 HydriUa lugens, Staud. Eom. M6m. vi. p. 490 (1892). 



Head and thorax whitish suffused with pale brown ; palpi fuscous, 

 whitish at tips ; tarsi with slight whitish rings ; abdomen whitish 

 tinged with brown. Fore wing ochreous white suffused and irro- 

 rated with brown, the costal area whiter ; subbasal line absent ; 

 faint traces of a waved antemedial line ; orbicular represented by a 

 small elongate black spot in cell, the reniform bv minute black 

 lunules on inner and outer sides; postmedial line very indistinct, 

 bent outwards below costa, then dentate, incurved below vein 4 ; 

 subterminal line absent ; a terminal series of faint dark points. 

 Hind wing white, the veins tinged with brown ; a fine brown 

 terminal line ; the underside with the costal area irrorated with 

 brown. 



Ah. 1. lugens. Darker. 



Hah. E. Siberia, Amurland, 1 $ , Ussuri ; Kashmir, Goorais 

 Valley (Leech), 1 d, Xubra (McArthur), 1 $. Exp. J 30, $ 28 

 niillim. 



Genus MESOTROSTA. 



Type. 

 Mesotrosta, Led. Nbct. Eur. p. 190 (1857) signalis. 



Proboscis fully developed ; palpi obliquely upturned, the 2nd joint reaching 

 to about middle of frons and moderately scaled, the 3rd short; frons with 

 rounded prominence ; eyes small, elliptical ; antenna; of male ciliated; thorax 

 smoothly clothed almost entirely with scales and without crests ; tibiae mode- 

 rately fringed with hair ; abdomen without crests. Fore wing with the apex 

 rounded, the termen evenly curved and not crenulate; veins 3 and 5 from 

 near angle of cell; 6 from upper angle; 9 from 10 anastomosing with 8 

 to form the areole ; 11 from cell. Hind wing with veins 3,4 from angle 

 of cell; 5 obsolescent from just below middle of discocellulars; 6, 7 from 

 upper angle ; 8 anastomosing with the cell near base only. 



4131. Mesotrosta signalis. 



Scopula signali.% Treit. Schmett. Eur. vii. p. 70 (1829), & x. 2, p. 149 ; 

 Fr. Neue Beitr. iv. p. 124, pi. 360. f . 5 ; Dup. Lep. Fr., Suppl. iv. 

 p. 529, pi. 90. f. 7: Herr.-Schan". Eur. Schmett., Noct. ff. 176, 177 ; 

 Staud. Cat. Lep. pal. p. 233. 



Head and thorax dark brown mixed with some grey ; abdomen 

 grey thickly irrorated with brown. Fore wing brown thickly 

 irrorated with grey, the veins, discal and submedian folds faintly 

 streaked with red ; antemedial line obsolete on costal half, then 

 indistinct, dark, defined by greyish on inner side, sinuous and 

 somewhat oblique ; orbicular yellow defined by red, small, round ; 

 reniform pure white defined by brown, narrow above, constricted 

 at middle and expanding below ; postmedial line faintly defined by 



