50 PROCEEDINGS OF THE ACADEMY OF [Part I 



ill-defined; veins brown. Venation: Sc long, ending just before 

 the fork of the long sector, Sci at the tip of Sci; Rs long, almost 

 straight; r at the tip of Ri; basal deflection of ^^4 + 5 about twice 

 r-7n; cell 1st M2 pentagonally rectangular, a little longer than vein 

 Cui beyond it; basal deflection of Cui just before the fork of M, 

 longer than Cu2 alone. Abdomen dark brown, the ninth segment 

 paler; hypopygium with the pleurites dark reddish brown, the ap- 

 pendages blackened. Male hypopygium (Plate IV, fig. 10) large 

 and highly complicated in structure; pleurites cylindrical with two 

 pleural appendages; the outer of these is a small, brown, clavata 

 lobe that is provided with a few long bristles; the inner or apical 

 pleural appendage is large, roughly triangular, the cephalic angle 

 produced into a conspicuous claw-hke hook; along the caudal mar- 

 gin there is a comb of about 30 slender teeth; proximal face of this 

 lobe produced into a short, blunt, blackened lobe. On the proximal 

 face of the pleurite near the base is a short cylindrical lobe capped 

 by a brush of very long yellowish bristles, the inner (cephalic) ones 

 shortest, the outer ones very long and conspicuous; basad of the 

 pleurite is a larger but somewhat similar lobe, the apical tuft of 

 hairs very dense but short, not exceeding the lobe in length. 



Habitat. — Brazil. 



Holotype, d^, Teffe, December 20, 1919 (H. S. Parish). 



Allotopotype, 9 • 



Paratopotypes, 2 cf 's. 



Dicranomyia napoensis sp. n. Plate IV, fig. 11. 



Male. — Length about 5 mm. ; wing 5 mm. 



Generally similar to D. egae sp. n., differing as follows: Size 

 smaller. Praescutal stripes confluent as in egae. Wings a little 

 broader, more grayish than brown, with the stigma more clearly 

 defined, oval, brown; Sc shorter, cell 1st Mi longer and narrower. 

 Male hypopygium (Plate IV, fig. 11) with the setigerous lobes on 

 the proximal face of the pleurites different in form; the basal lobe 

 is elongate-cylindrical, darkened, bearing a rather short tuft of 

 bristles at the apex; immediately caudad of this is a smaller lobe, 

 paler, with the bristles of proportionately equal length. Near mid- 

 length of the proximal face of the pleurite is a small cylindrical 

 lobe bearing two very powerful flattened bristles or fascicles of 

 bristles ; at the base of this lobe is a larger one with a powerful bristle 

 at its tip, the apex with abundant smaller bristles. The pleural 

 appendage has the comb-like teeth very irregular in size and dis- 

 tribution, not evenly spaced as in egae. Gonapophyses flattened, 

 the apices appearing as slender, erect, slightly curved pale blades. 



Habitat. — Peru. 



Holotype, cf , Napo River, June 15, 1920 (H. S. Parish). 



Dicranomyia rapax sp. n. Plate IV, flg. 12. 



Head dark grayish pruinose; mesonotum reddish yellow, un- 

 marked with darker; wings with Sc long; male hypopygium ^v-ith 



