AMERICAN MOTHS OF THE STJBFAMILT PHTCITESTAE 



63 



palpus with second segment slightly thickened with 

 scales. Forewing smooth ; 1 1 veins ; vein 2 from before 

 lower outer angle of cell; 3 from the angle, nearly 

 equidistant from 2 and 4; 4 and 5 connate or closely 

 approximate at base and approximate for a short dis- 

 tance beyond base; 6 from below upper angle of cell, 

 sUghtly bent towards base; 10 from the cell, more or less 

 approximate to the stalk of 8-9. Hind wing with vein 

 2 from close to lower outer angle of cell; 3 from the 

 stalk of 4-5 or closely approximate with it for a short 

 distance from angle of cell ; 4 and 5 long stalked (for over 

 one-half their lengths); 7 and 8 closely approximate 

 beyond cell, or shortly and weakly anastomosed; cell 

 short, less than one-half the wing length ; discocellular 

 vein curved, partially obsolescent; on male, anal angle 

 folded under to form a pocket enclosing a long hair- 

 pencil. Eighth abdominal segment of male with sternite 

 developed as a narrow, sclerotized pocket ; on each side 

 between abdominal segments 2 and 3 a shallow pocket 

 containing a modified scale tuft. 



Male genitalia with uncus stout, but variously shaped. 

 Transtilla absent. Harpe with sacculus very strongly 

 sclerotized, free or partially free and curved. Aedeagus 

 with strongly sclerotized and pointed apex; penis 

 imarmed. Vinculum stout. A long hair tuft from 

 intersegmental area adjacent to base of sacculus of 

 harpe. 



Female genitalia with bursa copulatrix membranous; 

 sigmmi, if present, a small patch of weak scobinations; 

 ductus bursae membranous (unsclerotized) except about 

 genital opening; ductus seminalis from bursa near 

 junction of biu-sa and ductus bursae. 



The characteristic pattern features of the species of 

 Difundella (as of Coptarthria and most species of 

 Rampylla) are: The strongly contrasted, fine, blackish, 

 transverse lines forming the outer border of the ante- 

 medial and the inner border of subterminal lines of 

 forewing; the almost straight, oblique or vertical ante- 

 medial line, set well out from base of wing; the oval, 

 pale discal spot covering the discocellular vein; and the 

 black streaks on veins 2 to 6 just beyond it. 



Genus Difundella, Species 124 and 125: D. cory- 

 nophora and D. subsutella 



[Labial palpus reaching above vertex in both sexes. Hind wing 

 with cell less than one-third the length of wing; vein lb of male 

 bent before middle and with a tuft of yellow hairlike scales on its 

 under side (within the bend). Gnathose greatly reduced, its 

 apical projection fine, needlelike. Costa of harpe without 

 projections.] 



124. Difundella corynophora Dyar 



Figures 7, 235, 715 



Difundella corynophora Dyar, Proc. U. S. Nat. Mus., vol. 47' 

 p. 327, 1914. 



Forewing with basal area (to antemedial line), and 

 upper median area beyond antemedial line and from 

 lower margin of cell to costa, blackish fuscous; some 



extension of this dark shade extends narrowly to inner 

 margin along the outer dark border of the antemedial 

 line ; ground color of remainder of wing a ruddy ocherous ; 

 some extension of this ocherous shade invades the dark 

 basal area along the lower fold and forms the centers of 

 the transverse lines ; beyond the cell the ocherous shade 

 is broken by black streaks on veins 2 to 6 and beyond 

 subterminal line it is more or less clouded by blackish 

 fuscous; discal spot ruddy ocherous, covering disco- 

 cellular vein; antemedial line oblique; its narrow dark 

 borders black shading to reddish; the dark borders of 

 subterminal line also more reddish brown than black; 

 all the dark transverse lines less contrasted and con- 

 spicuous than those of other species in the genus. Hind 

 wing dark smoky fuscous; the veins and terminal edge 

 black and (on the female) a blackish shade at apex. 

 Alar expanse, 15-16 mm. 



Male genitalia with uncus produced and slightly 

 bifurcate at apex. Free projection of sacculus curved 

 back towards lower margin of harpe. Aedeagus forked ; 

 the longer element of the fork spined at apex. Female 

 genitaha with signum a small round patch; genital 

 opening smrounded by an oblong, strongly sclerotized 

 plate ; in intersegmental area behind this plate a pair of 

 ventrolateral pockets (fig. 715b). 



Type locality: La Chorrera, Panamfi (tjrpe in 

 USNM). 



Food plant: Unknown. 



Distribution: Guatemala: Cayuga (Aug.), Chejel 

 (June). PanamA: La Chorrera. French Guiana: 

 Cayenne. 



EasUy identified by its genitalia. 



125. Difundella subsutella (Schaus), new combination 

 Figure 236 



Ulophora subsutella Schaus, Ann. Mag. Nat. Hist., ser. 8, vol. 11, 



p. 248, 1913. 

 Rampylla subsutella (Schaus) Dyar, Ins. Insc. Menstr., vol. 7, 



p. 84, 1919. 



The only representative of this species is the male 

 type which is somewhat rubbed and the markings con- 

 sequently obscured. It differs from corynophora in 

 having the pale ground color of the outer areas of fore- 

 wing more reddish than ocherous; the black outer 

 margin of antemedial Une more sharply defined, black 

 throughout, outwardly obUque to lower fold and thence 

 slightly curved inward to lower margin. Hind wing 

 semihyaline wliite with a faint brownish ocherous tint; 

 veins not appreciably darkened; a fine brown line along 

 termen. Alar expanse, 17.5 mm. 



Male genitalia with imcus triangulate. Gnathos 

 reduced even more than that of corynophora, the lateral 

 arms represented by mere stubs. Projecting part of 

 sacculus curving away from harpe. Aedeagus sickle 

 shaped; its apical haK sharply curved, very strongly 

 sclerotized, and tapering to a sharp point. 



Type locality: Juan Vinas, Costa Rica (Jan. ; type 

 in USNM). 



Food plant: Unknown. 



