﻿NO. 
  1972. 
  ■^'^^^' 
  DIPTERA 
  OF 
  THE 
  (lENJJi^ 
  FANNIA—MALLOCU. 
  625 
  

  

  apical 
  third 
  which, 
  are 
  apparently 
  the 
  culmination 
  of 
  a 
  series 
  of 
  very 
  

   short 
  hairs 
  which 
  runs 
  along 
  the 
  posterior 
  surface 
  and 
  descends 
  at 
  just 
  

   before 
  tliis 
  part; 
  hind 
  tibia 
  with 
  2 
  dorsal, 
  1 
  antero-dorsal, 
  and 
  2 
  

   antero-ventral 
  bristles. 
  Last 
  portion 
  of 
  fourth 
  vein 
  almost 
  three 
  

   times 
  as 
  long 
  as 
  penultimate; 
  outer 
  cross 
  vein 
  curved 
  and 
  very 
  sHghtly 
  

   longer 
  than 
  penultimate 
  section 
  of 
  fourth 
  vein. 
  Lower 
  scale 
  of 
  calyptrse 
  

   much 
  larger 
  than 
  upper. 
  Length 
  4 
  mm. 
  

  

  Tijpe.— 
  Cut. 
  No. 
  15424, 
  U.S.N.M. 
  

  

  Locality. 
  — 
  WiUiams, 
  Arizona 
  (H. 
  S. 
  Barber), 
  one 
  male. 
  

  

  FANNIA 
  BENJAMIN!, 
  new 
  species. 
  

  

  Male. 
  — 
  Black-bro^\^l. 
  Frontal 
  orbits 
  silvered, 
  the 
  central 
  stripe 
  

   velvety 
  black. 
  Antennae 
  brown, 
  the 
  two 
  basal 
  jomts 
  yellow; 
  arista 
  

   brown. 
  Face 
  grayish- 
  white 
  dusted, 
  upper 
  mouth 
  margin 
  yellomsh. 
  

   Palpi 
  yellow. 
  Disk 
  of 
  mesonotum 
  shining 
  brown, 
  unstriped, 
  lateral 
  

   and 
  posterior 
  margms 
  gray 
  dusted; 
  pleurae 
  black-bro\\Ti, 
  whitish 
  

   dusted, 
  sutures 
  yellowish. 
  Abdomen 
  black-brown, 
  subshining; 
  all 
  

   segments 
  -with, 
  a 
  central 
  black 
  stripe, 
  which 
  is 
  interrupted 
  at 
  the 
  pos- 
  

   terior 
  margins 
  of 
  segments, 
  and 
  a 
  rounded 
  spot 
  of 
  same 
  color 
  on 
  each 
  

   side 
  of 
  all 
  segments; 
  entire 
  abdomen, 
  except 
  on 
  black 
  spots, 
  covered 
  

   AN^ith 
  v/hitish 
  dusting; 
  numerous 
  bristles 
  on 
  segments; 
  hypopygium 
  

   mconspicuous. 
  Legs 
  yellow, 
  coxae 
  and 
  femora 
  broMiied, 
  the 
  tarsi 
  

   blackish. 
  Wings 
  clear, 
  veins 
  yellowish. 
  Calyptrae 
  grayish. 
  Ilalteres 
  

   yellow. 
  

  

  Frontal 
  stripe 
  linear. 
  Third 
  antennal 
  joint 
  at 
  least 
  half 
  its 
  own 
  

   length 
  short 
  of 
  reaching 
  mouth 
  margin; 
  arista 
  bare. 
  Acrostical 
  

   bristles 
  three-rowed 
  from 
  in 
  front, 
  2 
  pairs 
  of 
  pre-sutural 
  and 
  3 
  pairs 
  

   of 
  post-sutural 
  dorso-central 
  bristles. 
  Fore 
  tibia 
  with, 
  one 
  pre-apical 
  

   bristle; 
  mid 
  femur, 
  antero-ventral 
  surface 
  with 
  7-8 
  bristles 
  on 
  basal 
  

   half, 
  which 
  are 
  very 
  short 
  and 
  weak 
  at 
  base, 
  but 
  increase 
  in 
  length 
  

   and 
  strength 
  to 
  middle, 
  and 
  are 
  gradually 
  ^\dder 
  placed, 
  apical 
  half 
  

   with 
  a 
  comb-like 
  row 
  of 
  bristles, 
  18-20, 
  the 
  first 
  three 
  of 
  which 
  are 
  of 
  

   equal 
  length 
  and 
  much 
  stronger 
  than 
  the 
  others, 
  and 
  the 
  remainder 
  

   gradually 
  reduced 
  in 
  size 
  on 
  the 
  constricted 
  portion 
  at 
  apex 
  of 
  femur; 
  

   postero-ventral 
  surface 
  with 
  a 
  somewhat 
  similar 
  row 
  of 
  distinctly 
  

   weaker 
  bristles, 
  ^lid 
  tibia 
  ^\'ith 
  the 
  normal 
  bristling 
  of 
  the 
  group; 
  

   apical 
  half 
  swollen 
  on 
  ventral 
  surface; 
  the 
  pubescence 
  short. 
  Hind 
  

   femur 
  with 
  a 
  few 
  short 
  bristles 
  on 
  antero-ventral 
  surface, 
  and 
  two 
  

   strong 
  bristles 
  at 
  near 
  apex; 
  postero-ventral 
  surface 
  almost 
  bare, 
  

   sUghtly 
  swollen 
  at 
  apical 
  third 
  and 
  %\ith 
  a 
  group 
  of 
  8-9 
  long, 
  fine, 
  

   hair-like 
  bristles 
  in 
  a 
  group 
  on 
  the 
  raised 
  part. 
  Hind 
  tibia 
  with 
  2 
  

   dorsal, 
  1 
  antero-dorsal, 
  and 
  2 
  antero-ventral 
  bristles. 
  

  

  Length 
  3-3^ 
  mm. 
  

  

  69077°— 
  Proc.N.M.vol.44— 
  13 
  40 
  

  

  