39(3 Mr. A. G. Butler on new Oenera 



XLIX. — Descriptions of new Genera and Species of Lepi- 

 (foptera in the Collection of the British Museum. By 

 Arthur Gardiner Butler, F.L.S., F.Z.S., &c. 



Family Papilionidze. 

 Genus SpHuENOGONA, Butler. 



1. Sph(vnogona seniijlava, n. sp. 



Primaries above sulphur-yellow, witli a broad oblique broAvii 

 external border, decreasing in -width from tlie eosta to the ex- 

 ternal angle, and very slightly siniuited ahmg its inner margin ; 

 secondaries white, with a broad dentated brown border tVnm 

 the a])ex to the caudate projection ; body greenish grey ; collar 

 with yellowish hairs ; abdomen cream-coloured : wings below 

 mucli as in S. gratiosa ; primaries pale sulphur-yellow, gradu- 

 ally deepening in intensity towards the base, where they be- 

 come saftron-yellow ; secondaries cream-coloured, with the 

 outer border pale sulphur-yellow ; a few ill-defined brown 

 lituras in the usual positions : body cream-coloured. 



Expanse of wings 1 inch 11 lines. 



Hab. Trinidad (//. W. Gaird). Type, B.M. 



S. semijlava is most nearly allied to S. ectriva^ hut in colour- 

 ing it approaches S. gratiosa. 



Genus Terias, Swainson. 



2. Terias hutyroscij n. sp. 



Closely allied to 7'. harina, from which it differs in the con- 

 siderably narrower black-brown border to tlie primaries. 

 Expanse of wings 2 inches. 

 Hab. A ru Islands {Wallace). Type, B.M. 



We have two examples of this species and seven of T. 

 harina in the collection. 



e3. Terias solifera, n. sp. 



J . Wings above bright golden yellow ; primaries witli a 

 broad external dark brown border, nearly as in T. sari ^ ; 

 secondaries with costal and abdominal areas whitish ; a rather 

 broad, internally diffused and undulated dark brown border, 

 tapering to apex and anal angle ; fringe yellow ; body greenish 

 grey ; wings below as in T. senegalensis. 



Expanse of wings 1 inch 10 lines. 



? y. Sulphurous whitish, with the bisinuated excavation in 



