232 PROCEEDINGS OF THE NATIONAL MUSEUM vol. iie 



Spliaerocera (Parasphaerocera) shannoni, new species 



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

 as follows: Legs pale yellow brown, neither tibiae nor apices of femora, 

 appreciably darker. Abdominal pale spots somewhat smaller. Proster- 

 nmn consisting of a very small transversely triangular plate with a 

 narrow but not quite linear projection forward for a moderate distance. 

 Legs, especially femora, considerably thickened, hindtibiae with no 

 anteroventral spur. Male genitalia large, ninth tergite not emarginate 

 to receive the cerci, which are obliquely truncate at the apex and 

 separated by a deep U-shaped emargination; forceps yellow, bristly, 

 and curved upward as in S. ecuadoria, rest of genitalia concealed. 

 Sternites 1+2 (fig. 18) consisting of two small dots and a small 

 transversely oval plate; sternite 3 broadly subtriangular but with 

 posterior margin rounded, anterior margin and sides somewhat concave 

 (especially in the type) ; sternite 4 trapeziform, anterior and the con- 

 siderably shorter posterior margin straight, sides concave, the sternite 

 twice as wide as the third ; sternite 5 somewhat asymmetrical, strongly 

 transverse. 



Venezuela: San Esteban, Jan. 1-6, 1940, holotype cf , P. Anduze. 

 Panama Canal Zone: Barro Colorado Island, July 9, 1923, paratype 

 cf^, R. C. Shannon, USNM type no. 66594. 



Sphaerocera {jParasphaerocera) amphoraf new species 



Female. Resembles S. ecuadoria, new species, very closely but 

 differs as follows: Legs whitish yellow, apical third of femora and all 

 tibiae somewhat darker. Prostcrnum with a very narrow transverse 

 plate attached to the mesosternum, anterior extension so narrow and 

 feeble as to be scarcely visible. Legs rather long, femora slightly 

 thickened, anteroventral spur on hindtibiae rather strong. Pale spot 

 on abdomen slightly larger, particularly in the longitudinal direction. 

 Sternites 1+2 (fig. 19) represented by a very small, distinctly trans- 

 verse sclerotized spot; sternite 3 absent, but a minute black spot is 

 just visible; sternite 4 elongate, somewhat narrowed at each end, 

 widest three-quarters of length from anterior margin, nearly four 

 times as long as broad; sternite 5 rather widely crescentic; cerci each 

 with two long, almost straight bristles; 4 spiracles visible in the very 

 wide, white abdominal membrane. 



Ecuador: Chimborazo, Linje, July 1955, 9 holotype; Bugna, 9 

 paratype, R. Levi-Castillo, USNM type no. 66596. 



.^ Sphaerocera (Paraspliaerocerd) xiphosternum, new species 



Female. Resembles S. ecuadoria, new species, very closely but 

 differs as follows: On the average, slightly smaller. Legs whitish 

 yellow, apical third of femora and all tibiae somewhat darker. Pro- 



