562 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 56. 



BESKIOLESKIA, new genus. 



Genotype. — Beskioleskia husckii, new species. 



Clypeus flush, long, narrow, bent in middle, the lower half warped 

 forward. Epistoma short, full width. Facialia bare. Vibrissae dis- 

 tinct from the other bristles. Haustellum not as long as head height; 

 palpi fully as long as antennae, bent in middle, distal half compressed 

 and gently widened. Third antennal joint about five times second. 

 Arista long-pubescent. Eyes bare. Frontals stopping at base of 

 antennae. Two very short and weak proclinate fronto-orbitals in 

 female. No ocellars, ocellar triangle atrophied, ocelli very small. 

 Parafacialia bare. Cheeks not over one-fourth eye length. Two 

 stemopleurals and postintraalars ; three postsuturals, preacrostichals, 

 postacrostichals and lateral scutellars; no apical scuteUars. Third 

 vein bristled to small crossvein; others bare. Apical cell open nearly 

 in tip. Hind crossvein nearer to cubitus but distant. No median 

 marginals on first two segments; marginal row on third and anal; 

 and median discal pair on anal. 



BESKIOLESKIA BUSCKII, new species. 



Length, 5 to 6.25 mm. Two females, Cabima and Taboga Islands, 

 Panama, May 23 and June 19, 1911 (A. Busck). 



Pale luteous to pale fulvous. Third antennal joint smoky-rufous. 

 Frontalia light golden. Mesoscutum bright golden pollinose, with 

 four faint narrow smoky-yellow vittae. Abdomen subrufous on 

 posterior half or so, including median vitta and posterior part of 

 second segment; second and third segments with brown spot at 

 posterior margin on median line. Tarsi appearing dark from the 

 vestiture. Wings slightly smoky-yellowish; more yellowish on costa. 

 Tegulae yellowish. 



Type.— C&t. No. 22207, U.S.N.M. 



Tribe MYIOMINTHOESri. 

 UROCHAETONA, new genus. 



Genotype. — TJrochaetona longipes, new species. 



Differs from PhyllopJiUopsis as follows: Palpi not swollen in either 

 sex. Arista moderately long-plumose to tip. Two stemopleurals 

 and postintraalars; postacrostichals only hair like; preacrostichals 

 short. Hind legs very elongate in male, especially the tarsi. Ab- 

 domen more elongate and more pointed behind. Strong erect 

 median marginal pair on first abdominal segment. 



UROCHAETONA LONGIPES, new species. 



Length, 4.5 to 5.5 mm. One male and one female, Yahuarmayo, 

 Rio Inambari, Peru, 1,700 feet, February 9 and 11, 1910, on foliage 

 (C. H. T. Townsend). 



