228 Mr. Warren on the Pyralidina collected 



both of which a fissure occurs in the hind margin of the 

 fore wing, which thereby becomes bilobed, and at first 

 sight appears fractured; but on closer inspection the 

 marginal fringe is seen to be continued along both sides 

 of the fissure. As might be expected, the neuration is 

 modified and distorted ; the nervules, which, were it not 

 for the fissure, would run straight to the hind margin, 

 are deflexed round its extremity, and curved down- 

 wards into the inner margin of the upper lobe. So 

 unusual a departure from ordinary wing-structure would 

 seem to warrant the separation of the species thus 

 modified as a separate family. 



The next group to which I would direct attention is 

 that to which Azamora penicillana, Wlk., of the present 

 collection, and Lederer's Amhlyura corusca belong. The 

 members of this group are all characterised by the 

 possession of a membranous scale-clad pouch on the 

 upper surface of the fore wing of the male near its base, 

 extending usually half across the wing, but in one 

 species embracing its whole width. 



The number of species is probably very considerable ; 

 the British Museum Collection possesses as many as 

 thirteen, and several more are figured in Felder's work ; 

 but the main point on which I wish to insist is that 

 these species present us with every variety in the form 

 of labial palpi that occurs in the Pseudo-deltoids : and 

 I therefore come to the conclusion that the proper place 

 for the family is in that group, and not, where Lederer 

 would locate them, among the Pyralidina. 



In conclusion, I will just call attention to the peculiar 

 genus Diastreptoneitra, in which the neuration is curved 

 and distorted ; and to the four new genera, Dysglyptogona, 

 Erehostrota, Trionimatodes, and Atopomorpha, the species 

 of which, both from their superficial appearance and 

 their neuration, arouse a suspicion that, just as the 

 Noctuids pass into the Pseudo-deltoids, so these may in 

 reality be nothing but abnormal GeometridcB. One thing 

 is certain, that like the Rliopalocera, the Heterocera of 

 South America are among the most variable and erratic 

 in the world. 



