South American Micro-Lepidoptera. 29 



long, recurved, second joint thickened with whorls of scales roughly 

 projecting beneath or with whorls forming separate acute projecting 

 teeth of scales, terminal joint as long as second or somewhat shorter, 

 slightly thickened with scales, acute. Maxillary palpi minute, 

 filiform, appressed to tongue. Posterior tibiae clothed with rough 

 projecting hairs above and beneath. Forewings with 16 furcate, 

 2 from angle, 2-5 parallel, transverse vein very oblique outwards 

 from 2 to 5, faint between 5 and 6, 6 and 7 stalked, 7 to costa, 8 

 separate, approximated to 6 at base, 11 from Jiear middle. Hind- 

 wings V, narrow-trapezoidal, apex acute, more or less strongly pro- 

 duced, termen emarginate beneath apex, cilia 4 ; 2 remote, 3 and 4 

 nearly parallel, 4 from angle, 4 and 5 somewhat approximated, 6 

 and 7 approximated at base. 



Type spinigera. A remarkable genus, differing from the 

 whole of the family in having vein 8 of the forewings 

 separate instead of stalked with 7; the structure is un- 

 questionable, since all the veins are present, and is alike in 

 both species. Nor can there be any question that the genus 

 belongs to this family, and to the most advanced type of 

 it, since the highly characteristic hindwings (similar to 

 those of Aristotelia) are found in no other. The genus must 

 be supposed to have arisen from Aristotelia or a form of 

 similar structure, and the peculiarity of neuration can be 

 explained by the reduction and eventual absorption of 

 the stalk of 7 and 8 and apparently in this way only. 

 I regard it therefore as a proved instance of a struc- 

 tural change which is certainly rare, and would usually be 

 difficult of demonstration. 



Anomoxena spinigera, n. sp. 



cj $. 10 mm. Head ochreous-whitish, crown with a few dark 

 fuscous specks. Palpi white, second joint with eight rather long fine 

 whorl-teeth edged with black above, terminal joint with black rings 

 near base and above middle. Antennae white ringed with black, 

 towards apex with several narrow grey black-dotted bands separated 

 by single white rings. Thorax ochreous-whitish, dorsally finely 

 striated transversely with blackish. Abdomen blackish-grey. 

 Forewings narrowly elongate-lanceolate ; pale ochreous irregularly 

 irrorated with blackish; an inwardly oblique slender fascia of 

 blackish suffusion from costa at §, not or scarcely reaching dorsum; 

 costal area from this to apex fulvous, without dark irroration, with 

 four oblique fine wedge-shaped pale ochreous streaks posteriorly 

 edged with black : cilia grey, round apex whitish with three curved 



