NEOTROPICAL MICROLEPIDOPTERA, VII — OBRAZTSOV 227 



genitalia. The interspace between the larger (external) blotch of the 

 forewing and the curved, subterminal fascia is not divided by a shadow. 

 The inner margin of the mentioned blotch is straight in the new species, 

 and slightly incurved in valuta. The hind wing is distinctly pale 

 yellowish; in voluta it is gray whitish, tinged with fuscous reddish 

 towards apex. The shape of the uncus is quite different. The middle 

 process of the gnathos has two well-developed, lateral appendages 

 missing in voluta. Instead of a longitudinal carina of the sacculus, 

 observed in the new species, voluta has a brush of setae. The aedeagus 

 of the new species is of a unique shape, unknown in any other species 

 of the gen vis. 



This new species is named for its discoverer, my friend and colleague, 

 Dr. J. F. Gates Clarke of the U.S. National Museum. 



Pseudotneritastis heliadelpha (Meyrick), new combination 



Plate 4 (Fig. 1) 



Meritastis heliadelpha Meyrick, 1932, Exotic Microlepidoptera, vol. 4, p. 261. — 

 Clarke, 1955, Catalogue of the type specimens of Microlepidoptera in the 

 British Museum described by Edward Meyrick, vol. 1, p. 154. 



Types: Holot3'pe, male, Rio Zongo (Songo), Bolivia, 2,500 ft.; 

 Naturhistorisches Museum, Vienna (not seen) . One female paratype 

 (abdomen missing), same data, 1930; British Museum (Natural 

 History). 



Remarks: The female paratype corresponds well with the original 

 description, and undoubtedly belongs to the type lot which was 

 erroneously described by Meyrick (1932) as consisting of two male 

 specimens. The forewings of this paratype are in a less than fresh 

 condition, but the markings are recognizable; the hindwings are deep 

 orange, as in no other species of the genus. 



Pseudomeritastis orphnoxantha, new species 



Plate 4 (Figs. 2, 3) 



Male: Antenna, labial palpus, head, and thorax light gray ; terminal 

 segment of labial palpus brown. Forewing light gray, paler than 

 thorax; markings brownish ferruginous, edged and in part transversally 

 strigulated with dark brown, arranged as follows: a blotch (somewhat 

 rubbed off and not quite distinct in the examined specimen) on dorsum 

 towards base; its upper projection (or perhaps a separate streak) reaches 

 to upper vein of discal cell; a second larger blotch, also resting on 

 dorsum externad of former blotch, occupies most of external half of 

 forewing and extends almost to tornus; upper margin of this blotch 

 widely excavated; upper portion of blotch, externad of excavation, 

 large and rounded; upper portion of blotch, basad of excavation, acute 



