564 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 56. 



Palpi pale straw-color. Antennae pale fulvous; third joint in 

 female largely fuscous. Frontalia brownish. Rest of head silvery, 

 pale golden on parafrontalia. Pleura brown, with a broad oblique 

 silvery fascia. Mesoscutum pale golden pollinose, the irregular 

 forward half of postscutum shining dark brown, Scutellum shining 

 brown, the tip golden pollinose. Abdomen shining dark brown or 

 blackish; the base yellow as far as middle of second segment, but 

 leaving a dark median vitta in male; base of third segment narrowly 

 yellow on sides; bases of last three segments silvery to pale golden 

 pollinose. Femora yellow; the tips and rest of legs darker. Wings 

 nearly clear, faintly smoky-yellowish. Tegulae glassy, slightly tawny. 



Type.— Cat. No! 22251. U.S.N.M., from Panama. 



MINTHOMYIA, new genus. 



Genotype. — Minthotnyia ahdomlnalis, new species. 



Clypeus very shallow. Epistoma short, not warped. Faciaha 

 bare. Proboscis very short; palpi short and wide. Third antennal 

 joint about three times second in male, widening somewhat apically. 

 Arista a little longer than antennae, bare. Eyes bare. Male vertex 

 about one-seventh head width. Two frontals below base of anten- 

 nae. No prochnate fronto-orbitals in male. Parafacialia extremely 

 narrow, bare. Cheeks hardly one-sixth eye length in male. One 

 preacrostichal ; two sternopleiu-als and postsuturals ; three post- 

 intraalars and lateral scutellars; no apical scuteUars. Third vein 

 bristled only at base; others bare. Apical cell open just before tip. 

 Hind cross vein a little nearer to cubitus. Male tarsi and claws long. 

 Median marginal pair on first two segments; marginal row on last two. 



MINTHIOMYIA ABDOMINALIS, new species. 



Length, 6.5 mm. One male, Rio Charape, Jaen Province, Peru, 

 4,500 feet, September 12, 1911 (C. H. T. Townsend). 



Blackish, abdomen yellowish. Head thinly silvery. Palpi fulvous. 

 Articulation of antennae and base of arista tinged with fulvous. 

 Frontalia and posterior half of parafrontalia brown. Disk of meso- 

 scutum, humeri, and pleura thinly ashy, leaving two broad shining 

 vittae and scutellum bare. Abdomen fulvous-yellow; the anal 

 segment and posterior border of third brownish from the dried con- 

 tents of abdomen. Wings lightly smoky, more deeply so on outer 

 half of costa. Tegulae glassy-yellowish. 



Type.— C&t. No. 22235, U. S.N.M. 



TELOTHYRIOSOMA, new genus. 



Genotype. — Telothyriosma tersa, new species. 



Clypeus a little sunken. Epistoma cut off, warped on edge. 

 Facialia c*liate one-fourth way. Proboscis short, palpi rather club- 

 shaped. Third antennal joint hardly tliree times second in male. 



