396 PROCEEDINGS OF THE NATIONAL MUSEUM vol. ns 



Falculina antitypa Meyrick 



Figures 2b, 3a, 4; Plate 1 (fig. 3) 

 Falculina antitypa Meyrick, 1917, Exotic Microlepidoptera, vol. 2, p. 58. 



Alar expanse 24-36 mm. 



Antenna white basally, brown beyond. Head whitish ochreous, 

 shaded shghtly with ochreous laterally; second segment of labial 

 palpus grayish on outer side, white on inner side, apical segment 

 white. Legs whitish, slightly shaded with fuscous. Thorax as in 

 ochricostata. Forewing as in ochrico^tata except veins 7 and 8 

 separate. Hindwing as in ochricostata. 



Male genitalia: See figures (slide W.D.D. 2640). Uncus curved 

 approximately 90° ventrad at midpoint; gnathos consisting of two 

 separate, apically acute arms with yokelike ventral connection from 

 their bases; subscaphium absent; harpe narrow, slightly curved, 

 apically acute; anellus with four lateral lobes, the ventral pair short, 

 setiferous, the dorsal pair as3niimetrical, one apically acute, bladelike, 

 the other long, curved, trumpet-like, apex irregularly truncate; 

 aedeagus with a long, curved, lateral process, vesica clothed apically 

 with small spines. 



Female genitalia: See figures (slide W.D.D. 3063). Posterior mar- 

 gin of lamella antevaginalis naiTOwly cleft; ostium bursae with two 

 hea\dly sclerotized, pouchhke areas; ductus bursae long, membranous. 



Type : In the British Museum (Natural History) . 



Type locality: Rio Maroni, French Guiana. 



Distribution: French Guiana: Rio Maroni [no date]. 



I have examined specimens from Meyrick's original series and the 

 photograph of the type specimen given in Clarke (1955). This 

 species is very distinct on the basis of characters of the genitalia. 

 The long trumpet-like anellar lobe in the male genitalia and the 

 narrowly cleft posterior margin of the lamella antevaginalis in the 

 female genitalia readily separates antitypa from the other species of 

 Falculina. 



Falculina caustopis Meyrick 



Figures 2c, 5; Plate 1 (fig. 4) 

 Falculina caustopis Meyrick, 1932, Exotic Microlepidoptera, vol. 4, p. 288. 



Alar expanse 29 mm. 



Antenna whitish, shaded with gray basally, fuscous beyond. Head 

 grayish white, shaded laterally with orange; second segment of labial 

 palpus orange, shaded with fuscous on outer side, white on inner side, 

 apical segment white, slightly shaded with fuscous at apex. Legs 

 whitish, foreleg heavily shaded with fuscous. Thorax brown, shaded 

 with fuscous. Forewing with veins 7 and 8 closely approximated at 

 base; brown with faint pinkish tinge; basal half of wing mottled with 



