506 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 105 



veins pale except for short sections of R just before and beyond, and 

 Rs just beyond separation of Rl from Rs, of Rl just before coalescence 

 of Sc and Rl, and outer gradates (of which s, r-m, m have pale areas 

 in centers); Rs usually forking into R2+3 and R44-5 at point basad 

 of coalescence of Sc and Rl; Cul with about two to three branches to 

 margin ; sLx outer gradates. 



Female genitalia (fig. 23, a) : Eighth tergite of almost even length 

 throughout width, moderately broad ; ninth tergite with each latero- 

 ventral half considerably longitudinally elongate, with anterior width 

 less than one-half of and posterior width approximately one-fourth of 

 length, dorsal margin sloping posteroventrally, ventral border only 

 slightly curved from anterior margin to just beyond midpoint, then 

 curving more strongly posterodorsally to articulation point; tenth 

 tergite slender, short, longer lateroventrally. 



Lectotype: A female (pinned) from Bartica, British Guiana, 

 December (Parish); MCZ 11934; by present designation. 



Since no type was designated in the literature for this species, a 

 lectotype and lectoparatypes are here designated. 



The lectotype has the antennae entire (with 71 segments in left and 

 70 in right) ; the forewing shows the radiomedial streak extending 

 below Rs + MA, Rs forked beyond 2d r, four branches to Cul, the 

 portion of Rl above 2d r and 1st r-m pale, no antepterostigmal spot; 

 the hindwing shows two branches of Cul to margin. The meso thoracic 

 right leg is missing. 



Lectoparatypes: 10 females (pinned), with same data as lecto- 

 type; MCZ. 1 female (pinned), with same data; USNM. 1 female, 

 with same data; CU. 



The lectoparatypes show variation in the position of 2d r to Rs, 

 R2 + 3, or the fork of R2 + 3 in the forewing; the number of branches 

 from Cul (three to five in forewing and two or three in hindwing) 

 to margin. 



Topotype: 1 female (in alcohol), with slightly different data 

 "Botica (sic\) Br. Guiana"; USNM. This may have been originally 

 a cotype. 



The male is unknown. 



Navas (1933, p. 196; 1935, p. 38) has also recorded basalis from 

 "Brazil, Corumba, Matto Grosso, Mus. de Hamburg©," but it has not 

 been possible to procure this material in order to confirm the 

 determination. 



There is also a female (in alcohol, right wings on slide) which was 

 found on a light socket on the steamship Coppernane from Mexico 

 on August 13, 1934. The specimen was intercepted at Philadelphia, 

 Pa. The route of the ship is unknown, since the Philadelphia 

 Quarantine and Customs records for 1934 have been destroyed. 



