﻿452 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM. 
  vol.44. 
  

  

  Genus 
  ISODONTIA 
  Patton. 
  

   ISODONTIA 
  BIPUNCTATA, 
  new 
  species. 
  

  

  TMs 
  may 
  be 
  Sphex 
  rohusta 
  Cameron, 
  but 
  judging 
  from 
  his 
  descrip- 
  

   tion 
  it 
  would 
  seem 
  that 
  he 
  had 
  a 
  specimen 
  which 
  was 
  punctured 
  hke 
  

   azteca 
  Fernald 
  or 
  macrocephala 
  Fox. 
  He 
  says 
  "vertex 
  shining," 
  in 
  

   the 
  species 
  here 
  described 
  the 
  vertex 
  is 
  opaque. 
  His 
  specimen 
  is 
  

   also 
  said 
  to 
  have 
  gray 
  hair 
  on 
  the 
  metapleurse, 
  in 
  hipunctata 
  the 
  hair 
  

   on 
  the 
  metapleurse 
  is 
  black. 
  

  

  Female. 
  — 
  Length 
  20 
  mm. 
  Head 
  slightly 
  broader 
  than 
  the 
  thorax, 
  

   opaque, 
  very 
  finely, 
  closely 
  punctured, 
  the 
  vertex 
  with 
  large, 
  distinct 
  

   punctures 
  interspread; 
  frontal 
  impressed 
  line 
  strong, 
  complete, 
  divid- 
  

   ing 
  at 
  the 
  anterior 
  ocellus 
  and 
  extending 
  to 
  the 
  slightly 
  depressed 
  

   area 
  latrad 
  of 
  each 
  posterior 
  ocellus; 
  ocelli 
  in 
  a 
  low 
  triangle, 
  the 
  

   distance 
  between 
  one 
  of 
  the 
  lateral 
  ones 
  and 
  the 
  anterior 
  one 
  sub- 
  

   equal 
  with 
  the 
  width 
  of 
  the 
  anterior 
  ocellus; 
  supraclypeal 
  area 
  sharply 
  

   carinate; 
  clypeus 
  finely 
  granular 
  with 
  a 
  number 
  of 
  large 
  punctures 
  

   laterally, 
  the 
  anterior 
  margin 
  depressed 
  in 
  the 
  middle 
  with 
  two 
  short, 
  

   obtuse, 
  broad 
  lobes 
  which 
  are 
  separated 
  from 
  each 
  other 
  by 
  an 
  emar- 
  

   gination 
  wliich 
  in 
  width 
  is 
  equal 
  to 
  about 
  half 
  the 
  width 
  of 
  the 
  lobe; 
  

   mandibles 
  very 
  broad, 
  stout, 
  bidentate 
  apically, 
  the 
  inner 
  and 
  outer 
  

   teeth 
  subequal 
  in 
  length 
  (see 
  fig. 
  1); 
  antennae 
  slightly 
  thickening 
  

   apically, 
  the 
  joints 
  subnodose, 
  third 
  joint 
  one- 
  third 
  longer 
  than 
  the 
  

   fourth, 
  the 
  fourth 
  slightly 
  shorter 
  than 
  the 
  fifth; 
  mesoscutum 
  opaque, 
  

   finely, 
  closely 
  punctured 
  with 
  a 
  number 
  of 
  larger 
  punctures 
  inter- 
  

   spread; 
  scutellum 
  shiny, 
  sparsely 
  punctured; 
  mesepisternum 
  punc- 
  

   tured 
  like 
  mesoscutum; 
  dorsal 
  aspect 
  of 
  the 
  propodeum 
  finely, 
  trans- 
  

   versely 
  aciculate 
  with 
  many 
  rather 
  close, 
  mediiim-sized 
  pimctures, 
  

   in 
  appearance 
  opaque; 
  legs 
  rather 
  feebly 
  spined; 
  petiole 
  about 
  

   twice 
  the 
  length 
  of 
  the 
  posterior 
  coxae; 
  venation 
  of 
  the 
  normal 
  type. 
  

   Metallic 
  blue-green; 
  mandibles, 
  anterior 
  margin 
  of 
  the 
  clypeus 
  and 
  

   palpi 
  rufous; 
  legs, 
  except 
  the 
  four 
  posterior 
  femora 
  beneath 
  which 
  

   are 
  piceous, 
  scutellum 
  and 
  pronotum 
  black; 
  antennae 
  black, 
  the 
  basal 
  

   joints 
  of 
  the 
  flagellum 
  slightly 
  piceous 
  beneath; 
  lower 
  inner 
  margins 
  

   of 
  the 
  eyes, 
  superior 
  posterior 
  orbits, 
  tubercules, 
  prepectus, 
  spot 
  above 
  

   the 
  intermediate 
  coxa, 
  spot 
  above 
  the 
  posterior 
  coxa, 
  and 
  the 
  abdomen 
  

   with 
  short, 
  appressed 
  silvery 
  pubescence; 
  face, 
  clypeus, 
  pronotum, 
  

   anterior 
  part 
  of 
  the 
  mesoscutum, 
  mesepisternum, 
  propodeum 
  and 
  

   femora 
  with 
  black 
  hair; 
  the 
  vertex 
  of 
  the 
  posterior 
  orbits 
  with 
  long 
  

   gray 
  hair 
  or 
  a 
  mixture 
  of 
  black 
  and 
  gray; 
  posterior 
  part 
  of 
  the 
  meso- 
  

   scutum 
  with 
  short 
  gray 
  hair; 
  wings 
  purplish, 
  slightly 
  paler 
  apically; 
  

   venation 
  dark 
  brown. 
  

  

  Panama, 
  Canal 
  Zone. 
  One 
  female 
  collected 
  June 
  17, 
  1911. 
  

  

  Type.—CsLt. 
  No. 
  15090, 
  U.S.N.M. 
  

  

  