LOPHOSEMA. POLIOTHEIPA. 333 



dark brown defined on each side by greyish towards costa and on 

 outer side towards inner margin, strongly bent outwards below 

 costa, then acutely bidentate to discal fold, excurved to vein 3, then 

 bent inwards to below end of cell and acutely bidentate above inner 

 margin ; subterminal line ochreous white, curved, minutely dentate 

 with slight blackish streaks before it extending to postmedial line 

 below veins 8 and 6 and above 1 and with slight dark streaks beyond 

 it ; a fine black terminal line defined on inner side by a fine ochreous 

 line ; cilia red-brown mixed with ochreous. Hind wing whitish 

 suffused with brown, the interspaces semihyaline except towards 

 termen ; some blackish bars with whitish betAveen them on inner 

 margin at tornus ; cilia ochreous white at base and whitish at tips ; 

 the underside whitish, the costal and terminal areas suffused with 

 brown. 



Hah. Costa Eica, Tuis (ScJians), 1 J ; Fn. Guiana, St. Laurent 

 Maroni. Exj). 44 millim. Type f in U.S. Nat. Mus. 



Genus POLIOTHRIPA, nov. 



Type, P. ameria. 



Proboscis fully deTelopeci ; palpi upturned, the 2ud joint reaching to vertex 

 of head and moderate]}' scaled, the ord long and dilated at extremity ; Irons 

 with pointed conical proaiinence ; eyes large, round ; antennae of female 

 ciliated; thorax clothed almost entiiely Tvith scales and without crests ; tibite 

 moderately fringed with hair; abdomen with dorsal crests on basal segments. 

 Fore wing with the apex rounded, the termen evenly curved and slightly 

 crenulate; veins 3 and 5 from near angle of cell ; 6 from upper angle; 9 

 from 10 anastomosing with 8 to form a long areole ; 11 from cell. Hind 

 wing with veins 3, 4 from angle of cell; 5 fully developed from above angle; 

 6, 7 from upper angle ; 8 anastomosing with the ceil near base only. 



6638. Poliothripa ameria. 



Folia ameria, Druce, P.Z. S. 1890, p. 515; id. Biol. Centr.-Am., Het. ii. 

 p. 487, pi. 94. f. 17. 



2 . Head and tegulae whitish mixed with biown, the latter fus- 

 cous at tips ; 2nd joint of palpi and sides of frons brown ; thorax 

 white with some brown and black scales ; pectus and legs tinged 

 with ochreous brown, the tarsi fuscous ringed with white ; abdo- 

 men whitish dorsally mixed with brown. Fore wing whitish 

 mixed with fuscous black ; subbasal line double, sinuous, from costa 

 to submedian fold ; antemedial line double, sinuous, angled out- 

 wards below vein 1, then oblique to inner margin, the outer line 

 forming a wedge-shaped blackish patch at costa; claviform and 

 orbicular absent ; reniform an oblique blackish lunule with obscure 

 whitish annulus ; medial line indistinct, waved, bent outwards in 

 cell ; postmedial line black, oblique from costa to vein 4 where it 

 is acutely angled, then bent inwards to lower edge of reniform and 

 again slightly outwards above inner margin, some black points 

 beyond it on costa ; subterminal line blackish, angled outwards 



