SPHAEROCERA IN CENTRAL AND SOUTH AMERICA — RICHARDS 235 



sternite 5 trapeziform, sides straight, as long as anterior width. 

 Panama: bananas, Sept. 11, 1932, holotype 9, CAS. 



Sphaerocera (JParasphaerocera.) dissecta, new species 



Female. Allied to S. bimaculata Williston but evidently distinct. Legs 

 whitish yellow; hindtibia with no anteroventral spur. Facial plate 

 almost an equilateral triangle. Abdominal pale spots very large, 

 square; tergite 5 consisting of two small oval plates separated by 

 white membrane. Sternites 1+2 represented by a diamond-shaped 

 spot not quite as wide as hindfemur, angles du'ected anteroposteriorly, 

 other two laterally; sternite 3 small, width slightly greater than that 

 of hindtibia, anterior margin rounded, posterior margin straight; 

 sternite 4 more than twice as long as wide posteriorly, anterior margin 

 rounded, posterior margin straight, sides somewhat convergent 

 forward; sternite 5 rounded, crescentic, transverse. 



Panama: bananas, Sept. 22, 1932, holotype 9, CAS. 



Other Species of Subgenus Parasphaerocera 



I have placed near S. bimaculata WilHston those species of the 

 subgenus that have both pale abdominal spots and entirely pale legs. 

 There are a number of other species that have either the femora more 

 or less blackened or the abdominal spots very reduced or absent. 



Sphaerocera (Parasphaerocera) varipes Malloch 



Sphaerocera varipes Malloch, 1925, Proc. Ent. Soc. Washington, vol. 27, p. 121. 



Malloch described this species from 5 females from Costa Rica, San 

 Mateo, Higuito, and I have examined the holotype. As far as I 

 can make out, there is only one species in which the femora are half 

 black. This is redescribed below: 



Males and females. Black; antennae and legs yellow brown, 

 coxae and proximal half of femora black, trochanters pale. Abdom- 

 inal pale spots somewhat larger than in S. ecuadoria, new species, 

 their margins rather rounded. Length 2.5-3.0 mm. 



Facial plate flattened, transversely trapeziform. Prosternum con- 

 sisting of a small transverse triangular plate attached to the meso- 

 sternum, anterior extension of moderate length, not quite linear. 

 Femora distinctly thickened in the male, hindtibia with no antero- 

 ventral spur. Three anterior abdominal spiracles forming distinct 

 black spots in the white sternal membrane. Male with sternites 1 +2 

 (fig. 26) represented by a small oval central dot; sternite 3 rather 

 smaU, about twice as broad, somewhat rounded at each end and slightly 

 narrowed posteriorly; sternite 4 slightly broader than long, subrec- 

 tangular, posterior margin straight, sides and anterior margin slightly 



