222 PROCEEDINGS OF THE NATIONAL MUSEUM vol. iis 



Gates Clarke of the U.S. National Museum and Mr. J. D. Bradley 

 of the British Museum (Natural History), who placed the materials 

 in their charge at the author's disposal. Acknowledgments go also 

 to Dr. J. G. Rozen, Jr., and Dr. F. H. Rindge of the American Museum 

 of Natural History for providing the necessary working facilities. 

 The work on this paper has been made possible because of a grant 

 from the National Science Foundation. 



Pseudomeritastis^ new genus 



Meritastis (not Meyrick, 1910). — Meyrick [1912], Trans. Ent. Soc. London, 1911, 

 p. 677 (voluta Meyrick); 1912, in Wagner, Lepidopterorum catalogus, pt. 

 10, p. 36 (voluta); 1913, in Wytsman, Genera insectorum, fasc. 149, p. 34 

 (voluta); 1932, Exotic Microlepidoptera, vol. 4, p. 261 (heliadelpha Meyrick). — 

 Obraztsov, 1954, Tijdschr. Ent., vol. 97, p. 186 (voluta). —Clarke, 1955, 

 Catalogue of the type specimens of Microlepidoptera in the British Museum 

 described by Edward Me5Tick, vol. 1, pp. 154, 326 (heliadelpha, voluta); 

 1958, op. cit., vol. 3, p. 156 (voluta). 



Tortrix (in part). — Walsingham, 1914, in Godman and Salvin, Biologia Centrali- 

 Americana, vol. 42 (Lepidoptera-Heterocera, vol. 4), p. 276 (cordigera 

 Walsingham). 



Type species: Tortrix cordigera Walsingham, 1914. 



Head roughly scaled. Antenna in male slightly serrate, densely 

 short ciliated; in female simple, with short setae. Labial palpus 

 rather long, ascending, almost equally broad, scaling smooth; basal 

 segment slightly dilated; second segment long; terminal seginent 

 thick, exposed. Ocellus absent. Proboscis well developed. Thorax 

 with posterior crest more or less developed. 



Forewing broad; costa arched; apex rotundate; termen straight, 

 almost vertical; tornus broadly rounded; dorsum straight, gradually 

 curved in basal portion. No costal fold in male. Twelve veins, all 

 separate; vein S gently curved; Ri from behind middle of discal cell; 

 R2 widely remote from Ri and R3, slightly more approximated to 

 the latter; veins R3 through Mi almost equidistant at base; R4 to 

 apex; Mi and M2 widely separated, at termen slightly approximated to 

 each other ; upper internal vein (generally underdeveloped) originates 

 between Ri and R2 and ends at R5; veins M2 through Cuj distinctly 

 bent upwardly, at base almost as widely separated from each other 

 as R3 through Mi; Cui originates slightly before lower angle of 

 discal cell; Cu2 distinctly from before two-thirds of discal cell, but 

 always from behind its middle; Ai in median portion generally indis- 

 tinct; basal fork of A2+3 slightly shorter than one-third of entu'e vein. 



Hindwing rotundate-subtrapezoidal, as broad as forewing or 

 slightly narrower; costa gently arched; apex broadly rotundate; 

 termen almost straight; tornus very flatly rounded; dorsum broadly 

 rounded, in basal portion slightly sclerotized. Eight veins; S almost 

 straight; R and Mi closely parallel in basal portion, or stalked; M2 



