﻿Manchester 
  Mcuioii's, 
  ]'ol. 
  xli. 
  (1897), 
  No. 
  4. 
  95 
  

  

  the 
  scutellum 
  ; 
  the 
  median 
  segment 
  has 
  an 
  elongated 
  

   semicircular 
  area, 
  the 
  base 
  raised, 
  rugosely 
  punctured 
  ; 
  

   the 
  rest 
  of 
  it 
  smooth, 
  with 
  a 
  distinct 
  central 
  and 
  a 
  few 
  

   incomplete 
  longitudinal 
  keels, 
  there 
  being 
  also 
  a 
  trans- 
  

   verse 
  keel 
  before 
  the 
  apex. 
  Behind 
  the 
  narrow 
  part 
  

   of 
  this 
  area, 
  at 
  the 
  sides 
  of 
  it, 
  is 
  a 
  strongly 
  irregularly 
  

   obliquely 
  keeled 
  area 
  ; 
  the 
  apex 
  of 
  the 
  segment 
  semi- 
  

   oblique, 
  strongly 
  aciculated. 
  Meso- 
  and 
  meta-pleuras 
  

   thickly 
  covered 
  with 
  white 
  hairs 
  ; 
  the 
  latter 
  obliquely 
  

   striated. 
  Legs 
  black, 
  with 
  a 
  piceous 
  tinge, 
  the 
  femora 
  

   darker 
  ; 
  the 
  femora 
  sparseh-, 
  the 
  tibiae 
  and 
  tarsi 
  thickly, 
  

   covered 
  with 
  white 
  hairs. 
  Tegulse 
  testaceous, 
  darker 
  

   behind. 
  Wings 
  clear 
  hyaline, 
  the 
  nervures 
  and 
  stigma 
  

   blackish 
  ; 
  the 
  recurrent 
  nervures 
  received 
  near 
  the 
  apical 
  

   third 
  of 
  the 
  cellules. 
  Abdomen 
  shining, 
  smooth 
  ; 
  the 
  

   basal 
  three 
  segments 
  red 
  abo\'e 
  and 
  below 
  ; 
  the 
  apical 
  

   black, 
  thickly 
  covered 
  with 
  longish 
  white 
  hair. 
  

  

  Comes 
  near 
  to 
  H. 
  xanthognathus 
  Sm., 
  but 
  is 
  much 
  

   smaller 
  and 
  otherwise 
  quite 
  distinct. 
  

  

  Halictus 
  dissimilandus, 
  sp. 
  nov. 
  

  

  Long, 
  fere 
  6 
  mm. 
  2. 
  

  

  Hab. 
  Mussouri 
  {Kothney). 
  

  

  Is 
  very 
  like 
  H. 
  deconis 
  in 
  size 
  and 
  coloration, 
  but 
  may 
  

   be 
  at 
  once 
  known 
  by 
  the 
  base 
  of 
  the 
  median 
  segment 
  

   not 
  having 
  a 
  depressed 
  semicircular 
  area 
  clearly 
  defined 
  

   by 
  a 
  keel, 
  it 
  being 
  instead 
  strongly 
  reticulated; 
  the 
  legs, 
  

   too, 
  are 
  much 
  lighter 
  in 
  tint. 
  

  

  Antennae 
  black, 
  thick, 
  sparsely 
  covered 
  with 
  white 
  

   microscopic 
  hairs 
  ; 
  the 
  front 
  and 
  vertex 
  more 
  sparsely 
  

   with 
  longer 
  hairs 
  ; 
  the 
  vertex 
  obscurely 
  punctured 
  ; 
  

   mandibles 
  rufous, 
  the 
  tips 
  black. 
  Pro- 
  and 
  meso-notum 
  

   covered 
  with 
  fuscous 
  hairs 
  ; 
  the 
  hairs 
  on 
  the 
  scutellum 
  

   longer 
  and 
  paler 
  ; 
  the 
  pro- 
  and 
  meso-notum 
  coarsely 
  

   punctured 
  ; 
  the 
  scutellum 
  not 
  quite 
  so 
  strongl}- 
  punc- 
  

  

  