234 PROCEEDINGS OF THE NATIONAL MUSEUM vol. iie 



Sphaerocera (JParasphaerocera) transversalis, new species 



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

 as follows: Size slightly smaller. Facial plate (fig. 23) considerably 

 shorter in longitudinal direction, more transverse. Legs yellowish 

 white, apical third of femora and all tibiae slightly darker, femora 

 scarcely thickened, anteroventral spur of hindtibia hardly developed. 

 Prosternum at siu-face entirely membranous. Abdominal pale spots 

 distinctly larger, tergite 5 with a narrow white membranous area 

 both anteriorly and posteriorly. Sternites 1+2 (fig. 22) represented 

 by a rounded rectangular plate that is just transverse, no lateral 

 dots; sternite 3 rectangular with posterior corners slightly rounded, 

 about one and one-half times as long as broad; sternite 4 rather 

 small, rectangular, not quite twice as wide as long; sternite 5 partly 

 concealed beneath 4, not much wider; genitalia with ninth tergite 

 bearing a small central knob, somewhat emarginate to receive the 

 cerci, which are separated by a U-shaped emargination. 



Ecuador: Guaj^as, Cuatro Hermanitos Experhnental Farm, Feb. 28, 

 1955, holotype cf , R. Levi-Castillo, USNM type no. 66598. 



Sphaerocera (Parasphaerocera) lepidof new species 



Female. Resembles S. ecuadoria, new species, but difTers as follows: 

 Facial plate more transverse. Legs yellowish white, apical third of 

 femora and four hindtibiae somewhat darker, foretibiae blackish, 

 anteroventral spm* of hindtibia very small. Prosternmn (fig. 25) 

 shaped somewhat like a spearhead, sides angularly widened anteriorly 

 where there is a narrow forward projection. Abdominal pale spots 

 very large, tergite 5 divided centrally by a pale hne. Sternites 

 1+2 (fig. 24) represented by an almost square central plate, not very 

 small; sternite 3 considerably smaller, longer than broad; sternite 4 

 narrowed anteriorly, straight posteriorly, about twice as long as 

 wide; sternite 5 almost rectangular, sides hardly rounded, cerci 

 concealed. 



Panama Canal Zone: Fort Kobb, Camaron, July 17, 1952, holo- 

 type 9, F. S. Blanton, USNM type no. 66597. 



Sphaerocera {Parasphaerocera) transversa, new species 



Female. Close to S. lepida, new species, but evidently distinct. Legs 

 whitish yellow, apices of femora slightly darker; hindtibia with no 

 anteroventral spur. Abdominal pale spots relatively small, anterior 

 one with sides straight, posterior margin slightly convex, posterior 

 one oval with lateral ends pointed. Sternites 1+2 represented 

 by a rectangular transverse plate nearly twice as wide as hindfemm-; 

 sternite 4 somewhat more than twice as long as wide, posterior margin 

 straight, sides slightly convergent anteriorly, anterior margin rounded; 



