﻿370 
  PROCEEDIXGi^ 
  OF 
  THE 
  XATIONAL 
  MUSEUM. 
  

  

  LIMOSINA 
  ROTUNDIPENNIS. 
  new 
  species. 
  

  

  Female. 
  — 
  Black, 
  subopaquo; 
  front? 
  opaque 
  on 
  divergent 
  central 
  

   stripes, 
  slightly 
  shining 
  elsewhere, 
  bristles 
  strong 
  and 
  numerous, 
  face 
  

   brown, 
  sUghtly 
  shining, 
  projecting, 
  not 
  concave, 
  cheeks 
  not 
  half 
  as 
  

   high 
  as 
  eye, 
  the 
  anterior 
  bristle 
  on 
  mouth 
  margin 
  of 
  moderate 
  length, 
  

   succeeded 
  posteriorly 
  by 
  one 
  weaker 
  and 
  several 
  very 
  short 
  hair-like 
  

   bristles, 
  antennas 
  black-brown, 
  third 
  joint 
  slightly 
  paler, 
  not 
  muesli 
  

   larger 
  than 
  basal 
  joint 
  and 
  slightly 
  pointed, 
  pubescence 
  on 
  third 
  

   jomt 
  long, 
  pale, 
  basal 
  jomt 
  with 
  the 
  usual 
  dorsal, 
  and 
  apical 
  bristles 
  

   weak, 
  mesonotum 
  subopaque, 
  with 
  numerous 
  short 
  bristles, 
  which 
  

   are 
  irregularly 
  arranged, 
  only 
  one 
  pair 
  of 
  distinct 
  macrochaetse, 
  

   scutellum 
  opaque, 
  with 
  four 
  subequal, 
  strong, 
  marginal 
  bristles, 
  

   pleurae 
  brownish, 
  opaque; 
  abdomen 
  opaque 
  brown; 
  legs 
  brownish, 
  

   the 
  trochanters, 
  tibiae, 
  and 
  tarsi 
  paler, 
  no 
  noticeable 
  bristles 
  except 
  

   as 
  in 
  niveipennis 
  (hind 
  tarsi 
  indistinguishable), 
  wings 
  rather 
  short 
  

   and 
  rounded, 
  grayish, 
  costa 
  brown, 
  rather 
  thick, 
  noticeably 
  so 
  beyond 
  

   end 
  of 
  first 
  vem, 
  from 
  humeral 
  cross 
  vein 
  to 
  end 
  of 
  first 
  slightly 
  

   shorter 
  than 
  next 
  costal 
  division, 
  both 
  together 
  as 
  long 
  as 
  from 
  end 
  

   of 
  second 
  to 
  third 
  vein, 
  basal 
  part 
  of 
  third 
  vein 
  about 
  one-third 
  as 
  

   long 
  as 
  last 
  portion 
  of 
  second, 
  outer 
  cross 
  vein 
  distinctly 
  before 
  end 
  

   of 
  second, 
  from 
  outer 
  cross 
  vein 
  to 
  inner 
  cross 
  vein 
  distinctly 
  longer 
  

   than 
  basal 
  portion 
  of 
  third 
  and 
  not 
  twice 
  as 
  long 
  as 
  outer 
  cross 
  vein, 
  

   third 
  vein 
  on 
  last 
  portion 
  with 
  a 
  very 
  slight 
  upward 
  bend, 
  ending 
  in 
  

   front 
  of 
  wing 
  tip, 
  both 
  fourth 
  and 
  fifth 
  veins 
  traceable 
  beyond 
  outer 
  

   cross 
  vein, 
  the 
  former 
  distinctly 
  so; 
  halteres 
  yellowish. 
  

  

  Length, 
  0.75 
  mm. 
  

  

  One 
  female, 
  Culebra 
  Island, 
  Porto 
  Rico, 
  February, 
  1899 
  (A. 
  Busck). 
  

  

  Type.— 
  Cat. 
  No. 
  14952, 
  U.S.N.M. 
  

  

  Allied 
  to 
  the 
  foregoing. 
  

  

  LIMOSINA 
  NIVEIPENNIS, 
  new 
  species. 
  

  

  Hale. 
  — 
  Shining 
  black; 
  frons 
  shining 
  black, 
  the 
  central 
  divergent 
  

   stripes 
  velvety 
  opaque 
  black, 
  frontal 
  bristles 
  weak, 
  face 
  glossy 
  brown- 
  

   ish 
  black, 
  concave, 
  cheeks 
  shining 
  but 
  not 
  glossy, 
  anterior 
  bristle 
  above 
  

   mouth 
  strong, 
  the 
  others 
  posterior 
  to 
  it 
  much 
  smaller 
  and 
  five 
  in 
  num- 
  

   ber, 
  cheek 
  below 
  center 
  of 
  eye 
  half 
  as 
  liigh 
  as 
  eye 
  height, 
  antennaB 
  

   yellow, 
  basal 
  joint 
  rather 
  more 
  than 
  half 
  as 
  large 
  as 
  third 
  joint, 
  with 
  

   one 
  dorsal 
  and 
  five 
  or 
  six 
  apical 
  internal 
  bristles, 
  third 
  joint 
  shghtly 
  

   pointed, 
  with 
  long 
  pale 
  pubescence, 
  arista 
  dark, 
  one 
  and 
  one-half 
  

   times 
  as 
  long 
  as 
  breadth 
  of 
  frons, 
  distinctly 
  pubescent; 
  mesonotum 
  

   glossy 
  black, 
  the 
  dorsal 
  bristles 
  long 
  but 
  hairlike, 
  and 
  in 
  regular 
  rows 
  

   though 
  not 
  numerous, 
  pleurae 
  glossy 
  black, 
  scutellum 
  glossy 
  black 
  

   with 
  four 
  marginal 
  bristles, 
  the 
  anterior 
  pair 
  much 
  the 
  weakest; 
  abdo- 
  

   men 
  brownish, 
  hypopygium 
  large, 
  glossy, 
  with 
  numerous 
  surface 
  hairs; 
  

  

  