268 



UNITED STATES NATIONAL MUSEUM BULLETIN 207 



dition of veins 2 and 3 (from the angle of the cell) at 

 once distmguishes it from aU near relations. 



552. Rioja nexa, new species 

 Figures 70, 569 



Forewing blackish with basal area to antemedial area 

 dusted with whitish scaling and contrastingly paler than 

 remainder of wing; also some whitish dusting forming a 

 pale transverse shade across wing at end of cell; ante- 

 medial line outwardly slanting from costa to inner mar- 

 gin with a slight notch at lower fold, white, outwardly 

 bordered by a narrow black line; subterminal line faint, 

 irregularly dentate, pale (whitish gray), bordered in- 

 wardly by a broad blackish suffusion; discal dots con- 

 fluent, forming a blackish line along discocellular vein; 

 a row of faint blackish dots along termen. Hind wing 

 hyaline white with a faint fuscous shade on costa and 

 on termen towards apex. Alar expanse, 17 mm. 



Male genitalia with arms of bifid apical process of 

 gnathos divergent toward their pointed apices ; aedeagus 

 bulging and sUghtly bent before its broad, truncate 

 apex. 



Type locality: La Rioja, Argentina (type in USNM, 

 61382). 



Food plant: Unknown 



Described from a single male collected by Schaus. 

 The specimen is undated. 



Genera 160-162: Moerbes to Edulica 



[Venational division A. Forewing with 11 veins; 4 and 5 stalked. 

 Hind wing with 2 from before lower outer angle of cell; 3 and 



5 connate or stalked (.Edulica) ; discocellular vein curved. Male 

 genitalia with apical process of gnathos a stout hook with forked 

 apex; transtilla complete or, if incomplete (Moerbes), elements well 

 developed and their apices approximate. Labial palpi oblique or 

 upturned (Edulica).] 



160. Genus Moerbes Dyar 



Moerbes Dyar, Proo. U. S. Nat. Mus., vol. 47, p. 337, 1914. (Type 

 of genus: Zophodia dryopella Schaus.) 



Tongue well developed. Antenna shortly ciliate on 

 male (cUia as long as width of shaft). Labial palpus 

 oblique, broadly scaled, reaching to level of vertex; 

 third segment short (one-fourth the length of second), 

 acuminate. Maxillary palpus moderately large, some- 

 what rough scaled. Forewing smooth; 11 veins; vein 2 

 from weU before lower, outer angle of ceU; 3 from the 

 angle; 4 and 5 stalked (for a trifle less than half their 

 lengths), the stalk shortly separated from 3 at base; 



6 from below upper angle of cell, slightly curved; 8 and 

 9 stalked for about two-thirds their lengths; 10 stalked 

 with 8-9 ; male with a short, narrow costal fold. Hind 

 wing with vein 2 from well before lower, outer angle of 

 cell; 3 and 5 from the angle, connate; 7 and 8 anasto- 

 mosed for most of their lengths (free element of 8 very 

 short) ; cell approximately one-third the length of wing; 

 discocellular vein curved. Eighth abdominal segment 

 of male without hair tufts, but with sternite developed 

 as a shallow, triangulate, sclerotized pocket. 



Male genitalia with apical process of gnathos devel- 

 oped as an elongate, stout, flattened hook with forked 

 apex. Uncus subtriangulate with broad terminal mar- 

 gin. Transtilla incomplete, its elements elongate-angu- 

 late and well developed. Harpe simple with terminal 

 margin evenly rounded; costa sclerotized for four-fifths 

 of its length, but not produced. Anellus a narrow, 

 curved band with minute lateral lobes. Aedeagus mod- 

 erately stout, nearly straight ; penis simple. Vinculum 

 stout, longer than broad, sHghtly tapering to blunt ter- 

 minal margin. 



A distinct genus showing strong aflSnities in general 

 habitus (wing markings and color) and male genitahc 

 structure to Psevdodivona of group I. However, the 

 venational difference (the absence or presence of vein 4) 

 is consistent in both genera and the association of 

 Moerbes with the genus following (Moodnopsis) seems a 

 natm-al and proper one. It contains three tropical 

 American species represented in the National Museum 

 by eight males. I have seen no females. 



553. Moerbes dryopella (Schaus) 

 Figures 82, 570 



Zophodia dryopella Schaus, Ann. Mag. Nat. Hist., ser. 8, vol. 11, 



p. 249, 1913. 

 Moerbes dryopella (Schaus) Dyar (part), Proc. U. S. Nat. Mus., 



vol. 47, p. 337, 1914; Ins. Insc. Menstr., vol. 7, p. 54, 1919. 



Forewing white with a broad, dull, ocherous brown 

 shade along inner margin, and a sparse peppering of 

 black scales in the white areas; antemedial fine rather 

 broad, defined chiefly by thin inner and outer bordering 

 black lines, and conspicuous as a white spot on inner 

 margin, outwardly slanting from costa, inwardly angled 

 at lower part of cell and thence incurved to inner mar- 

 gin; subterminal line faint, defined by two black dashes 

 before and beyond it on costa and thin, broken, blackish 

 bordering lines, inwardly angled at vein 6, thence paral- 

 lel to termen ; costa from base to antemedial fine black, 

 and a fine black transverse subbasal line; lower discal 

 spot at end of cell present, black; below it a similar black 

 spot or dash merging into the brown shade bordering 

 inner margin; discal spot at upper outer angle of cell 

 obsolete; terminal blackish dots faint. Hind wing very 

 pale smoky fuscous, veins and terminal margin darker. 

 Alar expanse, 23 mm. 



Male genitalia with apex of apical projection of 

 gnathos considerably broadened and rather deeply bi- 

 furcate. Apices of transtilla elements well separated. 

 Aedeagus smooth, stout. Terminal margin of vinculmn 

 angulate. 



Type locality: Juan Viflas, Costa Rica (Apr.; type 

 in USNM). 



Food plant: Unknown. 



Represented only by the unique male type. The 

 specimens from Panamd referred by Dyar to Schaus' 

 species (Proc. U. S. Nat. Mus., vol. 47, p. 337, 1914) are 

 congeneric but not conspecific. I am describing them 

 in this paper as Moerbes emendata. 



