MICROLEPIDOPTERA OF JUAN FERNANDEZ ISLANDS — CLARKE 61 



tawny scales posteriorly; tegula mixed with tawny and reddish scales 

 posteriorly. Forewing fuscous, strongly overlaid with ferruginous; 

 at two-fifths of costa a straight, transverse, Ul-defined, fuscous line 

 extends to dorsum at basal third; from apical sixth of costa a transverse, 

 ill-defined line extends to vein 2 as a gently curved arc, along vein 2 to 

 cell, then diagonally to vein Ic, outwardly on Ic, then straight to 

 dorsum at outer two-thirds; in cell, in a straight line, three small 

 white dots preceded and followed by blackish-fuscous scales; on outer 

 half of costa four ocherous-tawny spots alternating with sufTused 

 shades of blackish fuscous ; on termen seven tiny, ill-defined blackish- 

 fuscous dots; cilia fuscous basally shading to ocherous tawny mixed 

 with cream buff; underside overlaid ferruginous outwardly; costal 

 spots accentuated; a conspicuous black spot at end of cell. Hindwing 

 grayish fuscous; on discocellulars, at bases of veins 6 and 8, a black 

 spot preceded by a whitish area of wing; from apical fourth of costa, 

 paralleling termen, an irregular blackish-fuscous line extends to anal 

 veins; cilia grayish fuscous basally shading to ocherous tawny mixed 

 with cream buff; dark markings of upper surface repeated and accen- 

 tuated on under surface. Legs ocherous buff overlaid with brick red 

 and suffused basally with fuscous; spurs grayish fuscous. Abdomen 

 grayish fuscous above, buff beneath. 



Male genitalia (slide 10399) : Harpe broad at base, cucullus tapering, 

 narrow, bluntly pointed; sacculus strongly sclerotized but simple; 

 clasper dilated distally and truncate. Anellus roughly elongate oval, 

 constricted posteriorly. Uncus broad basally, bluntly pointed; 

 posterior surface clothed with long, strong setae. Vinculum U-shaped, 

 narrow. Aedeagus moderately stout, curved; vesica armed with a 

 single long, slender cornutus. 



Type: Masatierra: El Yunque, 915 m. (Feb. 10, 1952). 



Described from the type male and one male paratype with same 

 data. 



In placing this species in the New Zealand genus Mnesidena, I do 

 so with reservation. At any rate, tetragramma does not belong in any 

 of the described South American genera and, except for having a 

 longer labial palpus, agrees in all respects with Meyrick's genus. 

 This species looks like a smaller and less well-marked example of 

 Pionea Jumipennis but is, of course, easily distinguished from it. 



Genus Pionea Guenee 



Pionea fumipennis (Warren) 



Figures 54-55 



Ebulea fumipennis Warren, 1892, Ann. Mag. Nat. Hist., ser. 6, vol. 9, p. 392 — 

 Hampson, 1899, Proc. Zool. Soc. London, 1899, p. 249.— Aurivillius, 1922, 



