﻿Records 
  of 
  Bees. 
  233 
  

  

  Boulder, 
  Colorado, 
  April 
  10, 
  at 
  flowers 
  of 
  Negundo. 
  The 
  

   male 
  oi 
  A. 
  cockerelli, 
  Graenicher, 
  has 
  the 
  hair 
  ou 
  lower 
  half 
  

   of 
  sides 
  of 
  metathorax 
  white, 
  and 
  hair 
  all 
  white 
  on 
  middle 
  and 
  

   hind 
  femora, 
  but 
  otherwise 
  it 
  is 
  like 
  A. 
  albihirta. 
  Male 
  

   albihirta 
  has 
  the 
  hair 
  on 
  sides 
  of 
  metathorax 
  all 
  black 
  and 
  a 
  

   good 
  deal 
  of 
  long 
  black 
  hair 
  on 
  all 
  the 
  femora. 
  

  

  Prosopis 
  mediolucens, 
  sp. 
  n. 
  

  

  <J 
  .—Length 
  6 
  mm. 
  or 
  slightly 
  more. 
  

  

  Black, 
  with 
  yellow 
  markings 
  (turned 
  red 
  by 
  cyanide 
  in 
  

   the 
  type). 
  Head 
  ordinary, 
  rather 
  broad; 
  front 
  extremely 
  

   densely 
  and 
  minutely 
  punctured, 
  sides 
  of 
  vertex 
  irregularly 
  

   and 
  more 
  sparsely, 
  showing 
  the 
  shining 
  surface; 
  clypeus 
  

   with 
  large 
  close 
  punctures 
  ; 
  face 
  below 
  antennae 
  yellow 
  ; 
  

   supraclypeal 
  mark 
  ending 
  obtusely 
  between 
  antennas 
  ; 
  lateral 
  

   marks 
  ending 
  at 
  about 
  level 
  of 
  middle 
  of 
  scape, 
  where 
  they 
  

   are 
  obliquely 
  truncate, 
  somewhat 
  notched 
  ; 
  scape 
  only 
  mode- 
  

   rately 
  thick, 
  with 
  a 
  broad 
  yellow 
  stripe 
  in 
  front 
  ; 
  flagellum 
  

   dark 
  ferruginous 
  above, 
  pale 
  ferruginous 
  beneath 
  ; 
  thorax 
  

   with 
  short 
  white 
  hair, 
  as 
  usual 
  ; 
  mesothorax 
  finely 
  and 
  closely 
  

   punctured, 
  but 
  shining, 
  scutellum 
  more 
  coarsely 
  and 
  irregu- 
  

   larly 
  punctured; 
  metathorax 
  convex, 
  finely 
  rugulose, 
  but 
  

   basal 
  area 
  large, 
  semicircular, 
  smooth 
  and 
  shining, 
  with 
  

   strong 
  transverse 
  ridges 
  laterally; 
  pleura 
  coarsely 
  and 
  

   densely 
  punctured 
  ; 
  upper 
  border 
  of 
  prothorax 
  interrupted 
  

   in 
  middle, 
  and 
  tubercles 
  yellow 
  ; 
  tegular 
  light 
  testaceous. 
  

   Wings 
  clear, 
  stigma 
  ferruginous 
  ; 
  first 
  r. 
  n. 
  joining 
  extreme 
  

   apical 
  corner 
  of 
  first 
  s.m. 
  ; 
  second 
  s.m. 
  much 
  longer 
  than 
  

   high. 
  Legs 
  shining, 
  with 
  the 
  knees, 
  apical 
  third 
  of 
  anterior 
  

   femora 
  beneath, 
  anterior 
  tibiae 
  except 
  a 
  patch 
  behind, 
  middle 
  

   and 
  hind 
  tibiae 
  except 
  a 
  broad 
  subapical 
  annul 
  us, 
  and 
  the 
  

   basitarsi 
  yellow 
  ; 
  small 
  joints 
  of 
  tarsi 
  ferruginous. 
  Abdo- 
  

   men 
  shining, 
  finely 
  punctured, 
  the 
  first 
  segment 
  sparsely 
  

   and 
  feebly 
  ; 
  hind 
  margins 
  of 
  first 
  three 
  segments 
  at 
  sides 
  

   thinly 
  hairy 
  ; 
  apex 
  with 
  a 
  brush 
  of 
  white 
  hair. 
  

  

  Hub. 
  Takao, 
  Formosa, 
  Nov. 
  21, 
  1907 
  (Sauter). 
  Berlin 
  

  

  Museum. 
  

  

  Genus 
  new 
  to 
  Formosa. 
  An 
  ordinary-looking 
  little 
  species 
  

   of 
  Palaearctic 
  f 
  acies, 
  with 
  face-marks 
  nearly 
  as 
  in 
  the 
  American 
  

   P. 
  citrinifrons, 
  Ckll., 
  but 
  recognizable 
  by 
  the 
  character 
  of 
  

   the 
  metathorax. 
  With 
  a 
  compound 
  microscope 
  it 
  is 
  seen 
  

   that 
  the 
  apical 
  half 
  of 
  the 
  metathoracic 
  enclosure 
  has 
  three 
  

   complete 
  transverse 
  ridges, 
  which 
  are 
  quite 
  straight, 
  while 
  

   the 
  basal 
  half 
  has 
  four 
  somewhat 
  oblique 
  ridges 
  on 
  each 
  side, 
  

   these 
  being 
  evanescent 
  and 
  more 
  or 
  less 
  coaleseent 
  in 
  the 
  

   middle. 
  So 
  far 
  as 
  I 
  know, 
  this 
  sculpturing 
  is 
  unique. 
  

  

  