itnrro(///H{f- 

 ria. 



262 ORTHOLITHA. By L. B. Prout. 



11. Genus: Ortliolitlia Hlm. 



(Soe Vol. ), p. 15S: V,;]. 10. p. S().) 



I have remarked elsewliere that it is doubtf'ul whether this is a natural gemis. Its diffeientiation t'roin 

 ■ Xanthorhoe has been niade de])en(lent chiefly on the elongate custal niargin of the forewing, but this sliow.s 

 every intermediate giadatioii in the Afriean, Australian and New Zealand faunae. As regards the o genitaUa, 

 the so-called canalicuhis of Pierce ("central projecting lip or groove of the juxta"') was not considered by 

 the late Mr. Burrow.s a satisfactory character and the otlier given distinction — the broad. platelike chitiniz- 

 ation of the costa of the valve - seeins also too inconstant to be of use; indeed Janse's investigation of the 

 South A{rica.n Ortholitha a.nd Xanthorhoe, published since I dealt with them in Vol. 10. has discovered no definite 

 line of deniarcation between the two genera. I therefore only leave here the fe\\ Indian and Cliinese species 

 wliioh may liave leal affinity with those that have been called Ortholitha in Vol. 4. 



A. ,^ a n t e n n a b i p e c t i n a t e. 



,i.ii.<:i)n-a. 0. nasifcfa Warr. (Vol. 4, pl. 11 a) lias quite the facies of several of the Palaearctic Ortholitha. but 



may easily be distinguished by the s i n g 1 e sharply-pointed central projeetion of the median area distally ; 

 the median area, as in similaria and others, is divided by a whitish central stripe into two narrow dark bands; 

 apieal dash developed. Kashniir to Simla. local, type froni Thundiani. 



siiiiilar'ui. 0. similaria Leerh (Vol. 4. pl. IIa) is lighter, browner. witli the median area of the forewing broad 



at Costa and at the bilobed central part, but with a rather dee}] curve inward between these two parts, though 

 scarcely so dee\) in this W. Chinese race as in the subspecies erschoffi Alph. (Vol. 4, p. 161). Distributed in 

 Szechuan. 



0. junctata (Vol. 4, pl. 7 g) microgynaria Hmpv. (26 d). Narrower-winged and somewhat greycr than 

 the name-typical race, which was described from the Ala Tau and is widely distributed in Central Asia; cell- 

 mark of forewing as a rule smaller than in any but rare aberrations of j. junctata. The V is notably small and 

 narrow-winged. Kashmir. chiefly in (Jurais Valley. 



iirihiiri. 0. arthuri sp. n. (2() e). o -i** mm, + 37 mm. Evidently related to niicrogynaria; larger, costa of fore- 



wing and apices (both wings) somewhat more romided, colour a little darker, greyer (less brown); forewing with 

 subbasal line more curved outward, antemedian with a pronounced outward h&\ in the cell; fringe more notice- 

 ably chequered with brown, especially on its whitish distal half. Underside also dark compared with that of 

 microgynaria. the postmedian line of the hindwing (when visible) more beut in the middle. Kashmir: (Jurais 

 Valley (type S) '^nf' Koksar (a pair) all from the Leech collection, taken by H. Mc Arthtr. 



roscii-uia. 0. roseicilia Hmps. (26 d). This very distinct sjjecies was referred by its author to the jjresent genus, 



under its synonym of Eubolia. and is retained here until its affinities have been explored. Wings broader and 

 of a more delicate texture, the unmarked hindwing and almost unmarked underside. as also the palpus, pect- 

 inations and venation, conformable to Ortholitha. Described from Bhotan. since received from Sikkim-Tibet, 



(irrltodea. evidently a lügh-altitude species. — ab. arrhodea nov. absolutely lacks the rosy scaling of the bands and fringes, 

 which remain of the ground-colour. C'hundjitang, Tibet, 13 000 feet, a o iii the British Museum, collected with 

 a typical, strongly rosy-marked J. 



niscijd.ir'iii. 0. roseifascia Hmps. (26 e). Wings .slightly less broad and more robust. Head, thorax and base of 



abdomen above more strongly sufltused with rose-colour. Forewing very much yellower, the rosy bands more 

 deeply coloured, the median decidedly broader and with its distal edge more sinuous, more strongly projecting 

 between 3rd radial and 2nd median, subterminal white spots on the whole smaller, with scarcely any trans- 

 verse connecting shade ; forewing beneath with much less extended smoky suffusion. Sikkim, 12 000 feet (Knyvett), 

 tyi^e ? and another; Kulu (Capt. Graham Young), 1 $. Notwithstanding the strong superficial dissimilarity, 

 I feel confident that this will prove to Vie the V to the preceding (of which I only know ^^), but as it bears 

 the prior name I am loth to make the union luitil both sexes have been collected in one locality. 



(Iiijili(ala. 0. duplicata Warr. (26 e) was another immistakable species luitil the closely similar eurypeda (see below) 



was tliscovercd. T'he name-typical form, here figured. has the hindwing very weakly marked on the upperside. 



.subiimhrin- Sikkim-Tibet; the Originals came from the Chumbi Valley. -- subfimbriata Front (Vol. 4, pl. 12 b. as duplicata, 



'"■ Suppl.-Vol. 4, pl 7 b) has a better developed smoky band at or dose to the termen of the hindwing above, divided 



by the white subterminal line; in the $, sometimes also in the ^, the postmedian of the hindwing is also more 



or less developed on the upperside. Szechuan, etc. 



eiinjpcda. 0. curypeda Front (Suppl.-Vol. 4, pl. 8 g) is somewhat larger, the pale areas of the forewing almost 



entirely without a yellowish finge, the hindwing very white, even more weakly marked than in cl. dnpUcata, 

 bands of forewing perhaps slightly browner, the whitish subterminal line more slender, generally cuntinued 



