in the Basin of the Amazons. 255 



branch and lower radial curved, apparently from the same point at 

 the end of the median ; disco-cellular absent ; upper radial from 

 the end of the subcostal nervure, which is slightly bent down- 

 wards and running much further than usual from the costa. Hind 

 wing with the costal and subcostal nervures united for a short 

 distance at the base ; subcostal with two branches ; median with 

 three branches ; no transverse vein ; the first and third median 

 branches starting together from where the lower end of the cell 

 should be ; the second out of the third. Palpi very long, recurved, 

 the last joint expanding internally into a brush ; tongue strongly 

 developed ; maxillary palpi not visible. Antennae short but stout, 

 slightly swollen near the middle, and with the first joint enlarged ; 

 each joint with two long sharp-pointed lateral bristles, and finely 

 but shortly pubescent beneath. Fore leg with the tibiae and upper 

 part of the tarsi roughly clothed with long hairs. 



The genus is distinguished from Gaberasa, Wlk., and 

 Pteroprista, with which it agrees in the incision in the 

 hind margin of the fore wings, by the excavated costa 

 and tuft of scales. Guenee enumerates four species, 

 viz., pterophoralis , alucitalis, orneodalis, and sueralis, 

 which appear to represent different degrees of departure 

 from typical wing-form. Thus P. sueralis has no distinct 

 incision in the hind margin, but only a simple indenta- 

 tion, and the costal cavity small and filled up with a 

 fringe of hairs just level with the costal outline. Aluci- 

 talis has the incision strongly-marked, but the costal 

 cavity small, with a fringe projecting slightly beyond 

 the costal outline. In orneodalis and pterophoralis, 

 besides the deep incision in the hind margin, the costa 

 is strongly concave from the base, and the crest of hairs 

 in the centre assumes a much greater prominence. It 

 is worthy of notice that all the examples at present 

 known of the three genera, Tortricodes, Gn., Gaberasa, 

 Wlk., and Pteroprista are males. 



The British Museum Collection at present possesses 

 no species of Tortricodes. But besides the single <? of 

 T. alucitalis here mentioned from the Traill collection, 

 there is a single S' of T. orneodalis in the Zeller 

 collection. T. pterophoralis and sueralis are still un- 

 represented. The Zeller collection also contains two 

 perfect males of Walker's Gaberasa ambigualis. I now 

 give the description of T. alucitalis, Gn. : — - 



