52 PROCEEDINGS OF THE ACADEMY OF [Part I 



brown. Legs with the coxae and trochanters yellowish testaceous; 

 remainder of the legs brownish black, the femoral bases paler. 

 Wings with a distinct brownish tinge; stigma small, subcircular, 

 slightly darker brown; veins dark brown. Venation: Sc long, Sci 

 extending to some distance beyond midlength of Rs, Sd close to the 

 tip of Sci,- Rs rather long, gently arcuated; r at the tip of R,; basal 

 deflection of i?4 + 5 about equal to or longer than the basal deflection 

 of Cui; cell 1st Mi closed, shorter than the veins beyond it; basal 

 deflection of Cui just beyond the fork of M. In the allotype, cell 

 1st Mo is a httle longer; basal deflection of Cih just before the fork 

 of M. Abdominal tergites dark brown; sternites pale obscure 

 yellow; hypopygium yellowish. Male hypopygium (Plate IV, fig. 9) 

 with the pleurites rather stout, provided with rather sparse long 

 bristles; near the inner distal angle with about four shorter but 

 powerful bristles in alignment; pleural appendage with the proximal 

 end drawn out into a long acuminate point that is strongly curved 

 near the outer end; this point is provided with a few delicate setae; 

 closely applied to this pleural appendage but possibly representing 

 a second appendage is a small blackened beak with four or five 

 points, the whole suggesting a cock's-comb. Gonapophyses appear- 

 ing as flattened blades, the tips slightly blackened and curved 

 laterad. 



Habitat. — Peru. 



Holotype, d", Yurimaguas, April 10, 1920 (H. S. Parish). 

 Allotype, 9 , Iquitos, May 12, 1920 (H. S. Parish). 

 Paratopotype, cf , April 16, 1920; paratype, cf , Iquitos, May 19, 

 1920. 



Dicranomyia fmnosa (Alexander) 



1912. ? Furcomyia fumosa Alexander, Can. Ent., vol. 44, p. 364. 



Napo River, Peru, June 12, 1920 (H. S. Parish). 



Genus RHIFIDIA Meigen. 

 1818. Rhipidia Meigen, Syst. Beschr., vol. 1, p. 153. 

 Four species of this genus have been taken within the Amazonian 

 Region but there are doubtless many others yet to be discovered. 



Rhipidia ( Rhipidia i perarmata sp. n. 



Antennae of the male long, bipectinate, bicolorous; head dark; 

 mesonotal praescutum reddish brown with a darker median stripe; 

 pleura dark brown ; femora brown with a narrow darker subterminal 

 ring; wings brownish gray, sparseh^ variegated with darker brown 

 and subhyaline; Sc long; abdomen annulated reddish brown and 

 dark brown; male hypopygium comphcated in structure. 



Male. — Length about 5.6 mm. ; wing 6.5 mm. 



Rostrum and palpi dark brown. Antennae of the male elongate, 

 bipectinate; flagellum badly injured by insect pests; pectinations 



