230 PROCEEDINGS OF THE NATIONAL MUSEUM vol. iie 



Sphaerocera iParasphaerocera) bimaculata Williston 



Sphaerocera bimaculata Williston, 189G, Trans. Ent. Soc. London, p. 435. 



This species was described from St. Vincent; two females, both 

 marked as co-types, are in the British Museum collection (BM), 

 together with another female from Grenada. I have no reliable 

 evidence at present that the species occurs elsewhere; all older 

 records from Florida and Central America require confirmation. 



Female. Close to S. ecuodoria, new species, but differing as follows: 

 Legs uniformly bright yellow brown. Size slightly smaller. Ab- 

 dominal pale spots larger, both wider and longer. Prosternum \vith 

 a narrow very transverse posterior piece, almost fused with the 

 mesosternum, and a short almost linear anterior process, which in one 

 9 is hardly sclerotized. Hindtibial spur very small indeed. Hind- 

 basitarsus a fraction larger. Sternites 1+2 (fig. 15) represented by a 

 minute sclerotized point; sternite 3 small, subrectangular, three times 

 as long as broad; sternite 5 subcrescentic; cerci yellow, each with 

 about 6 rather long hairs. 



Windward Islands: St. Vincent, 2 9 co-types, H. H. Smith; Grenada, 

 Balthazar, 9, H. H. Smith, BM. 



Among the S. bimaculata are IcT and 19 (latter headless) also from 

 Balthazar but apparently belonging to Si^haerocera (s.s.) species. The 

 abdomen has no pale spots; the face is partly orange, the antennal 

 foveae rather deep, with a distinct prominence below, on which stands 

 a short but rather stout bristle; ventral hindtibial spur long but weak 

 and rather hairlike. A female close to S. bimaculafa but apparently 

 different comes from Panama Canal Zone (Barro Colorado Island, 

 July 16, 1923, R. C. Shannon). In it the sides of sternites 3 and 4 

 are straight, not sinuous, and sternite 4 is considerably longer. 



Sphaerocera {Parasphaerocera) levicastilli, new species 



Alale. Resembles S. ecuadoria, new species, very closely but differs 

 as follows: Coxae and femora whitish, apical third of femora, tibiae, 

 and tarsi light brown. Prosternum (fig. 17) consisting of a small 

 equitriangular plate attached to the mesosternum with a narrow 

 projection forward nearly twice as long as plate. Legs not thickened, 

 hindtibiae with no anteroventral spur. Male genitalia large, with 

 tergite rather distinctly emarginate to receive the cerci, which are 

 separated by a deep V-shaped emargination; details of genitaha con- 

 cealed. Sternites 1+2 (fig. 16) consisting of two round sclerotized 

 dots and a small triangular plate; sternite 3 sub triangular, narrowing 

 posteriorly but posterior end rounded, length less than twice the 

 proximal width; sternite 4 sub triangular, quite wide, less than twice 

 as long as wide, posterior end slightly narrowed before apex and 

 weakly emarginate; sternite 5 almost completely hidden, transverse. 



