964 ME. G. r. HAMPSON ON THE OIiASSiriCATION [DeC. 17, 



h. Fore wing, the projection of outer margin acute and 

 hooked ; antennae of male with short branches. 



(2)*Prionoptbrts: elokgata, Zell. Hor. Ent. Eoss. 1877, p. 27, 

 pi. i. f. 9. C. America. 



Type. (3)tPEioNOPTEEYX NEBmiFEEA, Steph. 111. Brit. Ent., Haust. iv. 

 p. 317. Florida. 



Diaihrausta octomaculalis. Fern. Ent. Am. iii. p. 127. 



B. Fore wing with vein 11 free ; the projection of outer margin 

 blunt ; hind wing with vein 4 stalked with 5 ; antennae of 

 male with long branches. 



(4)tPEIO]SrOPTEETX AEEICALIS, n. Sp. 



S . Eeddish brown sufEused with grey ; palpi fuscous at sides ; 

 antennae ringed black and white. Fore wing with diffused grey 

 below median nervure ; an antemedial patch of dark scales above 

 inner margin ; the postmedial line very indistinct, highly angled 

 on vein 5, then inwardly oblique and with streaks of dark scales 

 beyond it ; a submarginal brown line with white inner edge angled 

 outwards to the marginal projection, then with three black specks 

 with triangular white marks between them beyond it. Hind wing 

 paler grey-brown ; the cilia whitish. 



$ . Eather paler arid without the dark marks beyond the post- 

 medial line of fore wing. 



Hah. Accra, W. Africa ; Congo. Exp. cJ 16, $ 24 mm. 



Sect. II. Fore wing with vein 7 absent ; 11 becoming coincident 

 with 12 ; hind wing with vein 4 absent; antennae of male 

 with the branches of moderate length. 



A. Antennae of female simple ; fore wing with the projection 



of outer margin acute and hooked. 



(5)tPEioNOPTEEXx ACHATiNA, ZeU. Mon. ChU. & Cramb. p. 13. 



U.S.A. 



B. Antennae of female serrate ; fore wing with the projection 



of outer margin rounded. 



(6)tPEIONOPT£ETX GEISEOSPAESA, n. Sp. 



$ . Head, thorax, and abdomen fuscous brown, thickly irrorated 

 with grey. Fore wing brown, thickly irrorated with white ; an 

 obscure discocellular brown spot ; a white mark at apex and some 

 white on cilia. Hind wing whitish. 



Hah. Colorado {CocJcerell). Exp. 30 mm. 



List of undetermined Species. 



Prionopteryx texturella, Zell. Hor. Ent. Eoss. xiii. 28, pi. i. f . 10. 



Zanzibar. 

 „ bergii, Zell. Hor. Ent. Eoss. xiii. 30, pi. i. f. 11. 



Buenos Ayres. 



