﻿NO. 
  1062. 
  TWO 
  NEW 
  SPECIES 
  OF 
  DIPTERA— 
  M 
  ALLOC 
  H. 
  463 
  

  

  incurved, 
  second 
  much 
  weaker, 
  those 
  on 
  jowl 
  numerous 
  and 
  shghtly 
  

   upcurved, 
  jowl 
  at 
  center 
  not 
  half 
  as 
  high 
  as 
  eye 
  at 
  center, 
  antennae 
  

   black, 
  basal 
  joint 
  with 
  several 
  rather 
  long 
  bristles, 
  third 
  joint 
  with 
  

   thick, 
  short, 
  pale 
  pilosity, 
  arista 
  subbasal, 
  distinctly 
  pubescent, 
  one 
  

   and 
  one-half 
  times 
  as 
  long 
  as 
  breadth 
  of 
  frons, 
  palpi 
  black; 
  mesono- 
  

   tum 
  shinuig, 
  indistinctly 
  three-striped, 
  posthumeral 
  bristles 
  strong, 
  

   incurved, 
  four 
  pairs 
  of 
  dorso-central 
  bristles, 
  acrostical 
  bristles 
  

   stronger 
  than 
  usual 
  and 
  distinguishable 
  from 
  the 
  usual 
  dorsal 
  setulse, 
  

   scutellum 
  subopaque, 
  longer 
  than 
  broad, 
  rounded, 
  with 
  eight 
  mar- 
  

   ginal 
  bristles, 
  the 
  anterior 
  pair 
  much 
  the 
  weakest, 
  being 
  only 
  half 
  as 
  

   large 
  as 
  third 
  pair, 
  which 
  arc 
  but 
  half 
  as 
  large 
  as 
  second 
  and 
  posterior 
  

   pairs 
  ; 
  abdomen 
  subopaque, 
  second 
  segment 
  as 
  long 
  as 
  segments 
  3-5 
  

   together, 
  the 
  other 
  segments 
  subequal, 
  there 
  are 
  numerous 
  bristles 
  

   on 
  lateral 
  margins 
  of 
  second 
  and 
  several 
  long 
  and 
  numerous 
  short 
  

   bristles 
  on 
  lateral 
  and 
  posterior 
  margins 
  of 
  fourth 
  and 
  fifth 
  segments, 
  

   hypopygium 
  glossy 
  black, 
  with 
  a 
  large 
  central 
  apical 
  depression 
  and 
  

   numerous 
  surface 
  hairs, 
  ventral 
  surface 
  of 
  hypopygium 
  and 
  abdomen 
  

   at 
  apex 
  hairy; 
  legs 
  black, 
  only 
  the 
  apices 
  of 
  mid 
  coxje 
  and 
  trochanters 
  

   yelloAvdsh, 
  fore 
  tibiae 
  with 
  pale 
  pilosity 
  on 
  apical 
  half 
  of 
  ventral 
  sur- 
  

   face, 
  mid 
  trochanters 
  mth 
  a 
  long, 
  strong, 
  curved 
  bristle 
  directed 
  

   toward 
  apex 
  of 
  femur, 
  mid 
  femur 
  with 
  a 
  row 
  of 
  regular, 
  short, 
  but 
  

   strong 
  bristles 
  on 
  apical 
  half 
  of 
  anterior 
  surface, 
  the 
  one 
  at 
  apex 
  

   much 
  the 
  strongest, 
  posteriorly 
  with 
  one 
  at 
  apex, 
  mid 
  tibiae 
  wdth 
  

   about 
  10 
  bristles 
  on 
  dorsal 
  surfaces 
  — 
  five 
  on 
  basal 
  third, 
  the 
  basal 
  

   one 
  single, 
  the 
  next 
  four 
  paired 
  and 
  much 
  stronger, 
  and 
  five 
  in 
  a 
  

   group 
  at 
  be3'ond 
  middle 
  — 
  one 
  ventral 
  bristle 
  beyond 
  middle 
  and 
  2-3 
  

   apical 
  spurs, 
  all 
  mid 
  tarsal 
  joints 
  except 
  apical 
  one 
  with 
  apical 
  spines, 
  

   those 
  on 
  metatarsus 
  very 
  strong, 
  hind 
  femur 
  normal, 
  hind 
  tibiae 
  with 
  

   rather 
  irregular 
  dorsal 
  setulae, 
  one 
  of 
  which 
  at 
  apical 
  third 
  is 
  dis- 
  

   tinctly 
  stronger 
  than 
  the 
  others, 
  hind 
  metatarsus 
  not 
  much 
  dilated 
  

   and 
  about 
  half 
  as 
  long 
  as 
  second 
  joint; 
  wings 
  clear, 
  costa 
  spinose 
  to 
  

   end 
  of 
  first 
  vein, 
  from 
  humeral 
  vein 
  to 
  end 
  of 
  first 
  vein 
  two-thirds 
  as 
  

   long 
  as 
  third 
  costal 
  division, 
  second 
  division 
  two 
  and 
  one-half 
  times 
  

   as 
  long 
  as 
  third, 
  costa 
  ending 
  at 
  apex 
  of 
  third 
  vein, 
  basal 
  portion 
  of 
  

   third 
  vein 
  subequal 
  to 
  second 
  portion 
  of 
  fourth, 
  last 
  portion 
  w^th 
  a 
  

   distinct 
  upward 
  bend 
  and 
  ending 
  distinctly 
  in 
  front 
  of 
  wing 
  tip, 
  

   outer 
  cross 
  vein 
  about 
  one 
  and 
  one-half 
  times 
  as 
  long 
  as 
  inner 
  and 
  

   half 
  as 
  long 
  as 
  second 
  portion 
  of 
  fourth, 
  fourth 
  vein 
  inchstinctly 
  

   traceable 
  to 
  near 
  wing 
  margin, 
  but 
  neither 
  it 
  nor 
  the 
  fifth 
  carried 
  

   distinctly 
  beyond 
  cross 
  vein; 
  halteres 
  with 
  j^ellow 
  knob 
  and 
  fuscous 
  

   stalk. 
  

  

  Length, 
  2| 
  mm. 
  

  

  One 
  female, 
  Rosslyn, 
  Virginia, 
  August 
  25, 
  1912 
  (J. 
  E.. 
  Malloch). 
  

  

  Type.—Qa.i. 
  No. 
  15217, 
  U.S.N.M. 
  

  

  Distinguishable 
  from 
  any 
  described 
  American 
  species 
  by 
  the 
  

   thornhke 
  bristle 
  on 
  the 
  mid 
  trochanters. 
  

  

  