168 Lord Walsingham's revision of the 



be taken to agree, so far as its condition enables a com- 

 parison to be made. The antennae are very strongly 

 bipectinate, each tooth fringed with slender hairs on 

 both sides. The lateral claspers are elongate, evenly 

 rounded at the end, and of even width throughout, so 

 far as they can be seen beyond the terminal segments 

 of the abdomen. The uncus is double, with the points 

 parallel, but not closely approximate. It measures 

 32 mm. in the expanse of the fore wings. 



The specimen figured by Eogenhofer came from 

 Ypanema, and was collected by Natterer ; the label on 

 Zeller's specimen shows that it came from the same 

 locality. 



Felderia pygmcsa, n. s. (PI. VIII., figs. XX, XXn'. 



Palpi recurved, overarching the thorax, clothed with long mixed 

 cinereous and brownish fuscous scales. Antenna; strongly bi- 

 pectinate, the pectinations placed widely apart, fringed with slender 

 hairs. Head and thorax cinereous, strongly shaded with brownish 

 fuscous. Fore wings with the costa somewhat arched; the apex 

 depressed, rounded ; the apical margin oblique, ground colour 

 cinereous, suffused with brownish fuscous, the darker shades of 

 which are concentrated along the costal margin and in four 

 separate patches on the wing-surface ; the first of these is situated 

 at one-third from the base on the costal half of the wing, a smaller 

 patch of the same colour lying below it beneath the fold ; beyond 

 this, near the middle of the dorsal margin, is a similar patch, a 

 more conspicuous one being placed on the outer end of the discal 

 cell ; each of these patches is followed by a few scales of the pale 

 cinereous ground colour of the wing ; there are also some few 

 inconspicuous dark spots upon the apical portion of the wing and 

 about the apical margin, but none of the markings are clearly 

 defined. Hind wings pale brownish fuscous. Abdomen the same, 

 slightly darker posteriorly: lateral claspers slender, somewhat 

 dilated and upturned posteriorly; uncus curved, single. Exp. al. 

 12 mm. 



A single male from Goya, Corrientes, Argentine 

 Republic, collected and sent to me by Mr. L. K. Perrens. 

 This species is particularly interesting, as showing that 

 the genus Felderia, characterised by its pectinate 

 antenna', like its near allies Anaphora and Acrolophus, 

 is represented 1>\ Bpecies of minute size. 



