OMORPHIXA; MESOTROSTA; MICRAESCHUS. By W. Warren. 259 



S. viola Stgr. (50 h [7]). Forewing rufous suffused with purplish white and dusted with black scales; viola. 

 an oblique diffused rufous band from middle of eosta to near tornus, inwardly angled below cell to near 

 base, preceded by an olive yellow streak in cell, and its outer odge indented by an olive yellow patch 

 in submedian interval; an oblique rufous fascia from apex to vein 5, with olive yellow beyond it; terminal 

 line rufous: fringe with white tips: hindwing dark bronzy brown, greyer towards base; a diffused crimson 

 patch below end of cell; an obscure dark cellspot; fringe white, crimson at base; underside of forewing 

 white suffused with crimson, of hindwing crimson, both with dark cellspots and diffused black terminal 

 patches not reaching apex. W. Turkestan. 



"21. Genus: Omorphiiia Alph. 



Tongue well developed; frons smooth, shining: palpi upturned, second segment long and roughly 

 haired beneath, the third fairly long, acute; antennae of $ lamellate, rough, pubescent only; head, thorax 

 ami abdomen rough-haired: femora and tibiae fringed with hair: the legs long; forewing triangular, the 

 apex prominent, the termen well curved, hardly oblique. Type 0. aurantiaca Alph. 



0. aurantiaca Alph. (50 h). Forewing fulvous brown, in basal half suffused with darker, more olive aura niiaca. 

 brown, rendering the markings less distinct: inner line -thick, oblique outwards and vertical below middle; 

 outer line finely brown, irregularly sinuous, indented on both folds; submarginal line thick, dark, nearly 

 straight from apex to lief ore anal angle; orbicular and reniform stigmata cloudy, the latter larger and 

 paler externally: traces of a dark median shade below middle; fringe brown; hindwing bright orange; 

 the base and inner margin with black scales; a' narrow and concise deep black terminal border; fringe 

 orange with the base dark; underside of both wings bright orange with black borders; the forewing with 

 large black cellspot. From Kuku Xor and Arndo, Tibet. 



22. Genus: Mesotrosta Led. 

 Tongue well-developed; frons with rounded prominence; palpi obliquely porrect upwards, the 

 second segment thickly scaled, the third short; antennae of $ ciliated; thorax and abdomen smoothly 

 scaled, without crests. Type Mesotrosta sig?ialis Tr. 



M. signalis Tr. (50 h). Forewing brown with dense grey irroration, the veins and folds streaked signalis. 

 with red; inner line indistinct, obsolete above middle, below with a grey line before it; outer line also 

 obscure, slightly whitish on outer side; subterminal line equally indistinct, with a small yellow spot on 

 costa; orbicular stigma small and round, yellow ringed with red; reniform pure white, outlined with brown, 

 narrow above and expanding below; hindwing brownish grey; a fine dark terminal line; fringe of both 

 wings tipped with white. Austria, Hungary, the Ural Mts. in Russia. — Larva flesh coloured above with 

 the segmental incisions yellow; the sides yellow; the ventral surface whitish; a dark dorsal line; the warts 

 brown; head brown; the thoracic plate yellowish. 



Subfamily Erastrianae. 



In the previous subfamilies vein 5 of the hindwing of the imago is subobsolete, a false not a true 

 vein (whence Guenee's term Trifidae), and the larva has 5 pairs of prolegs; in those which follow (Guenee's 

 Quadrifidae) vein 5 of the hindwing is as well developed as the other veins, while in the larvae one or 

 both- of the two first pairs of prolegs is aborted or absent. The insects composing the present subfamily, 

 the Erastrianae, have all, as far as present knowledge goes, larvae in which the prolegs are deficient, and 

 nearly all have the radial of hindwing strongly developed, the exceptions being found in a few American 

 genera which still retain the weaker vein of the Trifidae. They are all small insects, — some quite small 

 and of tender structure, — often gaily coloured and. flying by day; more numerous in tropical climates 

 and comparatively few in the Palaearctic region; of the 1200 and odd insects referred here by Hampson 

 scarcely one-seventh occur in it. They agree with the Amphipyrinae in having the tibiae without spines 

 and the eyes naked, without cilia; the larvae feed usually on low plants and grasses, a few on lichens and 

 coccidae, pupating in a spun cocoon above ground. 



1. Genus: Micraesclius Btlr. 

 Tongue aborted, small; frons smooth; palpi obliquely porrect, smooth and slender, the terminal 

 segment small; antennae of £ ciliated; thorax and abdomen smoothly scaled, without crests; tibiae smooth, 

 the spurs long; forewing with apex prominent, the termen bent or gibbous below vein 4; veins 8, 9, 10 

 stalked; hindwing with termen rounded; veins 3, 4 stalked. Type Micraeschns elataria Walk. 



Insects of small size and delicate structure, somewhat sparsely scaled. 



M. lutefascialis Leech (= solitaria Stgr.). (51a). Forewing brownish grey with slight pale irroration; lutefascialis. 

 inner hue marked only by a slight dark costal striga; outer line fine, black, excurved above and incurved 



