NYTHA. 113 



Genus NYTHA. 



Nytha, Billberg, Enum. Ins. 1820, p. 77 {teste Scudder). 

 Hipparchia, pt., M. fy de N. (nee Fabr.) Butt. Ind. \, 1883, p. 182. 



Type, N. hermione, Linn., from Central and Southern Europe. 



.Range. Palaearctic Region. In India, the Himalayas, Kashmir, 

 Baluchistan. 



3 2 • Fore wing broadly triangular, costa slightly arched, 

 termen and dorsum straight or very slightly convex, apex some- 

 what produced, tornus rounded ; discoidal cell long, well over 

 half length of wing; upper discocellular minute, middle com- 

 paratively long, arched inwards, lower longest, outwardly convex ; 

 veins 10 and 11 from before apex of cell ; vein 12 and median 

 vein greatly inflated at base. Hind wing broadly oval, termen 

 slightly scalloped ; cell well over half length of wing ; middle 

 discocellular longest, curved inwards; vein 3 from well before apex of 

 cell, 4 from apex, 6 closer to 7 than to 5. Antennae comparatively 

 short, not half length of fore wing ; club abrupt, broadly spatulate 

 (except in the aberrant form par y satis, Kollar) ; palpi with long 

 porrect hairs anteriorly to apex ; third joint short ; eyes naked ; 

 intermediate femora with long hair beneath. — tf . Secondary sex- 

 marks present or absent ; when present variable as to size and 

 position, but always of specialized, somewhat densely-packed 

 scales on the fore wing. 



Nytha is very close to Satyrus, but can be distinguished from 

 that genus by the difference in neuration of the hind wing, by the 

 very broadly spatulate form of the club of the antennae, and by 

 the non-hairy eyes. The forms here enumerated under Nytha 

 cannot be placed under Hipparchia, as that genus has the antennae 

 pointed at apex according to Fabricius' diagnosis. 



Key to the forms of Nytha. 



A. Club of antennas short, broad, spatulate, not 



pointed at apex. 



a. A broad, continuous, postdiscal ochraceous 



band on upperside of fore wing. 



«'. c? . Secondary sex-mark of jet-black 



specialized scales in a broad short 



streak in middle of cell on upperside 



of fore wing N. thelepkassa, p. 114. 



b' . (5 . Secondary sex-marks of brown 



specialized scales placed on both sides 



of median vein on upperside of fore 



wing. 



a 2 . Ground-colour of wings dark brown ; 



a subtornal round black spot on 



hind wing N. baldiva, p. 114. 



b 2 . Ground-colour of wings paler brown ; 

 no subtornal black spot on hind 



wing Race lehana, p. 115. 



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