AMERICAN MOTHS OF THE SUBFAMILY PHYCITINAE 



267 



brownish gray; veins and terminal margin but little 

 darker. Alar expanse, 19.5 mm. 



Male genitalia with terminal margin of uncus slightly 

 concave; apex of harpe rather broadly rounded; arms 

 of bifid apical process of gnathos divergent toward their 

 apices; plate of aneUus broad. 



Type locality: Santa Catarina, Brazil (type in 

 USNM, 61381). 



Food plant: Unknown. 



Described from unique male type collected by Fritz 

 Hoffmann Sept. 27, 1934. 



The species is easily separated from proselytes by its 

 darker (blackish gray) ground color, more strongly con- 

 trasted transverse pale lines, shorter costal fold, and dif- 

 ferent genitaha. The tegulae are black tipped Hke those 

 of proselytes, but their blackness is less contrasted 

 against the dull reddish ocherous of the remainder of the 

 thorax. 



158. Genus Cayennia Hampson 



Cayennia Hampson, Ann. Mag. Nat. Hist., ser. 10, vol. 5, p. 62, 

 1930. (Type of genus: Cayennia rufitinctalis Hampson.) 



Tongue well developed. Antenna pubescent (cUia- 

 tions less than the width of shaft). Labial palpus up- 

 turned, reaching to vertex, slender, third segment nearly 

 as long as second. Maxillary palpus minute, fihform. 

 Forewing smooth; 1 1 veins; vein 2 from well before lower 

 outer angle of cell; 3 from the angle; 4-5 stalked for 

 nearly half their lengths, approximate at base to 3; 6 

 from below upper angle of cell, very slightly curved; 8 

 and 9 long stalked; 10 from the stalk of 8-9; 11 from 

 well out on cell, running close to stalk of 8-9 for a short 

 distance; male without costal fold. Hind wing with 

 vein 2 from before lower outer angle of cell; 3 and 5 from 

 the angle, stalked (for approximately one-half) ; 7 and 8 

 anastomosed for most of their lengths beyond cell (free 

 element of 8 a very short spur) ; cell nearly one-half the 

 length of the wing; discoceUular vein curved. Eighth 

 abdominal segment of male with a pair of ventrolateral 

 hair tufts. 



Male genitalic characters same as those for Entmema- 

 cornis except penis with only sclerotized wriiildings. 



A distinct genus close to Entmemacomis and agreeing 

 with it in all male genitalic characters, differing only in 

 having simple antennae and different venation (vein 10 

 of forewing stalked with 8-9, and 3-5 of hind wing 

 stalked) and in lacking costal fold on male forewing. 



551. Cayennia rufitinctalis Hampson 



Figures 72, 568 



Cayennia rufitinctalis Hampson, Ann. Mag. Nat. Hist., ser. 10, 

 vol. 5, p. 62, 1930. 



Forewing pale ashy gray peppered with fuscous, the 

 basal half of inner area and tornal half of terminal area 

 tinged with rufous; antemedial line near middle of wing, 

 narrow, slanting outwardly from costa to middle of cell 

 thence inwardly to lower fold and thence outwardly to 

 inner margin, whitish with blackish lines before and 

 beyond it on the veins; sub terminal line inwardly 

 oblique and slightly concave from apex to inner margin 



before tornus, whitish, margined inwardly by short 

 blackish dashes on the veins; discal dots small, blackish, 

 below them on an inwardly slanting line blackish dots 

 on veins 3 and 2b; a row of small blackish dots along 

 termen. Hind wing semihyaline white with veins, 

 terminal and costal margins shaded with pale brown. 

 Alar expanse, 17.5 mm. 



Male genitalia with apical portion of uncus narrow 

 (considerably reduced as compared with that of 

 Entmemacomis proselytes); transtilla triangulate; vin- 

 culum tapering, but slightly constricted before narrow, 

 angulate terminal margin. 



Type locality: Cayenne, French Guiana (type in 

 BM). 



Food plant: Unlcnown. 



The female is unknown. Hampson mentions only 

 the male tjrpe in his description; but in the U. S. 

 National Museum there is a male "cotype" so labeled 

 by Hampson from the type locaHty. The species is 

 easUy identified by its genitalia and the medial position 

 of the antemedial line of forewing. 



159. Rioja, new genus 



Type of genus : Rioja nexa, new species. 



Tongue well developed. Antenna pubescent. Labial 

 palpus upturned, reaching vertex, slender; third seg- 

 ment almost as long as second. Maxillary palpus 

 minute, filiform. Forewing smooth, 11 veins; veins 2 

 and 3 connate from lower outer angle of cell; 4 and 5 

 short stalked (for decidedly less than half their lengths) , 

 approximate at base to 3 ; 6 from below upper angle of 

 cell, straight; 8 and 9 long stalked; 10 from cell, ap- 

 proximate to stalk of 8-9 at base; male without costal 

 fold. Hind wing with 2 from before lower outer angle 

 of cell; 3 and 5 stalked for less than half their lengths; 

 7 and 8 anastomosed beyond cell for half their lengths; 

 cell a trifle less than half as long as wing; discoceUular 

 vein curved. Eighth abdominal segment of male with- 

 out hair tufts; sternite developed as a triangulate, 

 sclerotized pocket. 



Male genitalia with apical process of gnathos bifid. 

 Uncus semispoon-shaped, constricted before apical end. 

 Transtilla a complete arched bridge. Harpe simple; 

 cucullus broad and -with terminal margin evenly 

 rounded; costa sclerotized but not produced. Anellus 

 a narrow curved band with long lateral arms partially 

 encircling the aedeagus. Aedeagus stout, moderately 

 long; penis minutely scobinate, otherwise simple. 

 Vinculum stout, longer than broad, slightly tapering. 



This genus forms a link between the two preceding 

 genera and Moerbes Dyar. I should hesitate to describe 

 it upon a single male if it were not obvious that the 

 specimen is not a freak, and if it did not have characters 

 that prevented its inclusion in Entmemacomis, Cayen- 

 nia, or Moerbes. 



Its uncus and gnathos are of the Entmemacomis 

 type, its eighth-segment pocket similar to that of 

 Moerbes; but its venation is unique. The connate con- 



