406 PROCEEDINGS OF THE NATIONAL MUSEUM vol. io9 



Wing. — Pattern as figured; second radial cell blackish; pale spot 

 over r-m crossvein quite broad; cell R5 with three small round post- 

 stigmatic spots in a triangle, the two next to the second radial cell 

 more or less fused, a large, oblique, double spot broadly meeting wing 

 margin in distal part of cell; vein Mi pale margined from apex nearly to 

 its base, veins M2 and M3+4 pale margined on distal portions; cell M, 

 with three pale spots, the distal one located at the wing margin; cell M2 

 with two pale spots in distal part, the distal one broadly meeting wing 

 margin; cell M4 with a large pale spot; two small round pale ppots in 

 distal part of anal cell; pale area at base of anal cell narrowly con- 

 nected to the large pale area over wing base; pale spot present in 

 cell M2 behind medial fork. Macrotrichia fairly numerous on distal 

 half of wing and in anal cell; costa extending to 0.58 (0.56-0.61, 

 n=16) of distance to wing tip. Halter pale. 



Abdomen. — ^Dark brown, cerci yellowish. Spermathecae two, pyri- 

 form, subequal, each measuring 0.057 by 0.037 mm., the bases of the 

 ducts sclerotized a considerable distance. 



Male genitalia: Ninth sternum with broad, deep, caudomedian 

 excavation; ninth tergum markedly tapering with very long, slender, 

 pointed, apicolateral processes. Basistyle with ventral root foot- 

 shaped, dorsal root slender; dististyle slender, slightly curved, with 

 bent, pointed tip. Aedeagus with very broad, rounded, basal arch 

 extending to about half of total length, the basal arms evenly curved; 

 distal portion of two types: in one the very slender, median, distally 

 striate tip is flanked by a prominent pair of lateral points of about 

 the same length; in the other type, the lateral points are apparently 

 lacking and the striated median tip is broader. Parameres each with 

 basal knob large, stem moderately stout and curved, bearing an 

 extremely large ventral lobe; distal portion tapering to a fine point 

 and bearing about five strong lateral barbs. 



Distribution: Cuba; Atlantic and Gulf Coasts of United States 

 from Massachusetts to Florida and Texas, Caribbean and Atlantic 

 Coasts of Central America and West Indies to Brazil, Pacific Coast 

 from Mexico to Ecuador. 



Panama records: 



BocAS DEL ToRO PROVINCE: Almirante. 



Canal Zone: Balboa, Corozal (S. T. Darling, 1912), Farfan Beach (C. L. 



Pierce, 1944), Fort Gulick, Fort Kobbe, Fort San Lorenzo, Fort Sherman, 



France Field, Galeta Point, Huile Sia Clara(?), Loma Boracho, Mojinga Swamp. 

 CniRiQuf Province: Alanje, Algarrobo, Boca Chica, Chiriquf, David, Gualaca, 



Horconcitos, Rfo Tabasard, Tortugas. 

 Cocl6 Province: Aguadulce, Ant6n, Chiru, El Barrero, El Cristo, El Retiro, 



El Salado, Espino, Natd, Pocrl, Puerto Farall6n, Puerto Obaldia, Puerto Posado, 



Rfo Hato. 

 Col6n Province: Cativd, Pina, Salud. 



