﻿6 
  PROCEEDINGS 
  OP 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  67 
  

  

  the 
  hind 
  tarsi 
  distinctly 
  paler; 
  wings 
  hyaline, 
  veins 
  dark, 
  stigma 
  pale. 
  

   First 
  tergite 
  with 
  a 
  median 
  black 
  stripe, 
  broadened 
  on 
  postpetiole, 
  

   not 
  reaching 
  apex; 
  second 
  tergite 
  black 
  with 
  the 
  apex 
  broadly 
  and 
  a 
  

   lunate 
  mark 
  on 
  each 
  side 
  nearly 
  surrounding 
  the 
  spiracle 
  pale, 
  the 
  

   apical 
  band 
  partly 
  interrupted 
  on 
  each 
  side 
  by 
  an 
  abrupt 
  offshoot 
  

   from 
  the 
  black; 
  third 
  tergite 
  black 
  basally, 
  pale 
  apically, 
  with 
  a 
  pale 
  

   spiracular 
  spot; 
  fourth 
  to 
  seventh 
  black 
  basally, 
  pale 
  apically, 
  more 
  

   broadly 
  so 
  at 
  sides; 
  eighth 
  black 
  medially 
  pale 
  laterally. 
  

  

  Male. 
  — 
  Like 
  female, 
  but 
  with 
  sculpture 
  stronger, 
  antennal 
  annulus 
  

   embracing 
  flagellar 
  joints 
  9-16; 
  first 
  abdominal 
  segment 
  black 
  ven- 
  

   trally, 
  and 
  coxae 
  paler 
  above 
  with 
  a 
  narrow 
  blackish 
  line. 
  

  

  Type-locality. 
  — 
  Cabin 
  John, 
  Md. 
  

  

  Type.— 
  Cat. 
  No. 
  27683, 
  U.S.N.M. 
  

  

  Described 
  from 
  11 
  females 
  and 
  16 
  males; 
  the 
  type 
  taken 
  by 
  G. 
  N. 
  

   Collins; 
  3 
  other 
  females 
  and 
  2 
  males 
  from 
  the 
  type-locality 
  (R. 
  M. 
  

   Fouts) 
  ; 
  1 
  male, 
  Chain 
  Bridge, 
  Va. 
  (W. 
  Middleton) 
  ; 
  1 
  female, 
  Rosslyn, 
  

   Va. 
  (H. 
  H. 
  Smith); 
  1 
  male 
  (allotype), 
  Falls 
  Church, 
  Va. 
  (Frederick 
  

   Knab) 
  ; 
  1 
  female, 
  Glencarlyn, 
  Va. 
  (S. 
  A. 
  Rohwer) 
  ; 
  1 
  male, 
  Dixie 
  

   Landing, 
  Va.; 
  1 
  female, 
  Virginia; 
  1 
  male, 
  Washington, 
  D. 
  C. 
  (R. 
  M. 
  

   Fouts); 
  1 
  male, 
  District 
  of 
  Columbia; 
  1 
  female, 
  Coosa 
  River, 
  Chilton 
  

   county, 
  Ala. 
  (H. 
  H. 
  Smith) 
  ; 
  1 
  female, 
  Coleta, 
  Ala. 
  (H. 
  H. 
  Smith) 
  ; 
  

   1 
  female 
  and 
  4 
  males, 
  Pysiton, 
  Clay 
  county, 
  Ala. 
  (H. 
  H. 
  Smith) 
  ; 
  1 
  

   male, 
  Longdale, 
  Chambers 
  county, 
  Ala. 
  (H. 
  H. 
  Smith) 
  ; 
  3 
  males, 
  

   Paradise 
  Key, 
  Fla. 
  (C. 
  A. 
  Mosier) 
  ; 
  1 
  female, 
  Blount 
  county, 
  Tenn.; 
  

   and 
  1 
  female, 
  Dallas, 
  Tex. 
  (F. 
  C. 
  Bishopp). 
  

  

  This 
  series 
  shows 
  considerable 
  variation. 
  The 
  type 
  is 
  about 
  

   average 
  in 
  size, 
  the 
  variation 
  being 
  about 
  two 
  millimeters 
  in 
  each 
  

   direction. 
  The 
  sculpture 
  of 
  the 
  apical 
  slope 
  of 
  the 
  propodeum 
  varies 
  

   from 
  nearly 
  smooth 
  to 
  mostly 
  rugose, 
  with 
  sometimes 
  a 
  rather 
  dis- 
  

   tinctly 
  defined 
  narrow 
  median 
  longitudinal 
  area. 
  Some 
  of 
  the 
  

   females 
  have 
  the 
  petiole 
  black 
  beneath 
  as 
  in 
  the 
  allotype, 
  while 
  many 
  

   of 
  the 
  males 
  lack 
  the 
  spiracular 
  white 
  spot 
  on 
  the 
  third 
  tergite. 
  

  

  Genus 
  BRACHYCRYPTUS 
  Thomson 
  

  

  The 
  species 
  described 
  below 
  is 
  not 
  entirely 
  typical 
  of 
  the 
  genus, 
  

   differing 
  from 
  Thomson's 
  description 
  as 
  follows 
  : 
  mesoscutum 
  rather 
  

   strongly 
  declivous 
  anteriorly; 
  nervellus 
  reclivous, 
  broken 
  at 
  or 
  above 
  

   the 
  middle; 
  hind 
  tibia 
  distinctly 
  longer 
  than 
  femur; 
  pul 
  villi 
  small. 
  

   It 
  is 
  also 
  considerably 
  larger 
  than 
  either 
  of 
  Thomson's 
  three 
  species, 
  

   though 
  smaller 
  than 
  simplex 
  (Tschek), 
  which 
  was 
  subsequently 
  

   referred 
  to 
  the 
  genus 
  by 
  Schmiedeknecht; 
  and 
  has 
  the 
  abdomen 
  red 
  

   only 
  narrowly 
  at 
  the 
  apices 
  of 
  the 
  first 
  two 
  tergites. 
  If 
  it 
  does 
  not 
  

   belong 
  to 
  this 
  genus 
  it 
  can 
  not 
  be 
  referred 
  to 
  any 
  described 
  genus 
  

   and 
  I 
  prefer 
  to 
  place 
  it 
  here 
  rather 
  than 
  add 
  to 
  an 
  already 
  too 
  long 
  

   list 
  of 
  almost 
  meaningless 
  generic 
  groups. 
  

  

  