﻿NEW 
  LAXTERXFLIES 
  FROM 
  SOUTH 
  AMERICA 
  — 
  FEXXAH 
  103 
  

  

  Aedeagus 
  tubular, 
  sli^litly 
  taporiun; 
  distally, 
  pcriandiium 
  rocurved 
  

   dorsally 
  at 
  apex 
  into 
  a 
  sinuate 
  spine, 
  penis 
  when 
  everted 
  with 
  two 
  

   curved 
  spines 
  directed 
  ventrally 
  and 
  two 
  straight 
  spines 
  porrect 
  

   caudad. 
  Genital 
  styles 
  distally 
  expanded, 
  in 
  profile 
  with 
  apical 
  mar- 
  

   gin 
  sinuately 
  oblique, 
  dorsal 
  margin 
  sinuately 
  horizontal, 
  folding 
  in- 
  

   ward 
  with 
  a 
  short 
  pointed 
  lobe. 
  

  

  Tijpe.—JJ.SSM 
  No. 
  57100. 
  

  

  Described 
  from 
  one 
  male 
  taken 
  at 
  Para, 
  Brazil, 
  by 
  P. 
  R. 
  Uhler 
  

   (coll. 
  No. 
  132). 
  This 
  species 
  is 
  distinguished 
  by 
  the 
  carination 
  of 
  

   the 
  frons 
  and 
  by 
  the 
  pattern 
  on 
  the 
  tegmina, 
  as 
  well 
  as 
  by 
  the 
  shape 
  of 
  

   the 
  genitalia. 
  

  

  ATESON 
  LUTEOSPERSUM, 
  new 
  species 
  

  

  Plate 
  3, 
  Fiouurs 
  48, 
  49 
  

  

  Fe77iaJe. 
  — 
  Length, 
  7.0 
  mm. 
  ; 
  tegmen, 
  8.5 
  mm. 
  

  

  Lateral 
  margins 
  of 
  frons 
  not 
  much 
  raised 
  above 
  level 
  of 
  disk, 
  disk 
  

   of 
  vertex 
  scarcely 
  depressed, 
  margins 
  scarcely 
  raised. 
  

  

  Vertex, 
  frons, 
  clypeus, 
  pronotum, 
  and 
  mesonotum 
  fuscous, 
  heavily 
  

   speckled 
  with 
  yellow 
  spots, 
  genae 
  testaceous, 
  sternum 
  and 
  legs 
  fuscous. 
  

   Tegmina 
  fuscous, 
  heavily 
  marbled 
  and 
  spotted 
  with 
  yellow 
  on 
  mem- 
  

   brane, 
  a 
  small 
  patch 
  basad 
  of 
  stigma 
  and 
  over 
  junction 
  of 
  claval 
  veins 
  

   yellow, 
  corium 
  wholly 
  fuscous, 
  veins 
  spotted 
  with 
  yellow. 
  Wings 
  

   smoky, 
  veins 
  fuscous. 
  

  

  Ovipositor 
  with 
  first 
  valvulae 
  bearing 
  two 
  teeth 
  dorsally 
  near 
  apex 
  

   and 
  a 
  curved 
  apical 
  spine; 
  apex 
  of 
  second 
  valvulae 
  rounded 
  in 
  profile. 
  

   Genital 
  chamber 
  (bursa 
  copulatrix) 
  with 
  three 
  pairs 
  of 
  sclerotized 
  

   plat<'.s, 
  each 
  of 
  the 
  posterior 
  pair, 
  in 
  dorsal 
  view, 
  elongate-quadrate, 
  

   each 
  of 
  the 
  middle 
  pair 
  larger, 
  curved 
  and 
  triangular, 
  each 
  of 
  the 
  

   third 
  (dorsal) 
  pair 
  small, 
  narrow, 
  sinuately 
  tapering 
  as 
  shown 
  in 
  

   figure. 
  

  

  7y/>c.— 
  U.S.N.M. 
  No. 
  57101. 
  

  

  Descril)ed 
  from 
  one 
  female 
  taken 
  at 
  Cabima, 
  Panama, 
  by 
  A. 
  Busck 
  

   (May 
  28, 
  1911). 
  Thi.s 
  species 
  is 
  distinguished 
  by 
  the 
  weak 
  carination 
  

   of 
  the 
  frons 
  and 
  vertex, 
  by 
  the 
  shape 
  of 
  the 
  second 
  valvulae 
  of 
  the 
  

   ovipositor 
  and 
  of 
  the 
  sclerites 
  of 
  the 
  genital 
  chamber, 
  and 
  by 
  tho 
  

   distribution 
  of 
  the 
  yellow 
  spots 
  on 
  the 
  tegmina. 
  

  

  ATESON 
  MARMORATUM 
  Metralf 
  

   Pr.ATi: 
  3, 
  FifiUKES 
  r»0-54 
  

  

  AtCHon 
  mannoralum 
  MfrrcAu. 
  Bull. 
  Miih. 
  Coinp. 
  Z<)oI., 
  vol. 
  82, 
  No. 
  5, 
  p. 
  300, 
  1938. 
  

  

  For 
  comparison 
  with 
  the 
  preceding 
  species 
  figures 
  are 
  given 
  of 
  the 
  

   male 
  genitalia 
  of 
  a 
  paratype 
  specimen 
  and 
  of 
  tho 
  distinctive 
  portions 
  

   of 
  the 
  female 
  genitalia. 
  

  

  