﻿Records 
  of 
  Bees. 
  487 
  

  

  white 
  liair 
  ; 
  clypeus 
  very 
  densely 
  punctured, 
  not 
  keeled, 
  its 
  

   lower 
  margin 
  in 
  the 
  middle 
  with 
  a 
  pair 
  of 
  small 
  nodules, 
  and 
  

   projecting 
  between 
  them 
  a 
  tuft 
  of 
  pale 
  orange 
  hair; 
  supra- 
  

   clypeal 
  region 
  elevated, 
  convex, 
  very 
  densely 
  punctured, 
  the 
  

   punctures 
  running 
  into 
  striae 
  ; 
  front 
  very 
  densely 
  punctured 
  ; 
  

   vertex 
  with 
  extremely 
  large 
  separated 
  punctures 
  ; 
  punctures 
  

   on 
  mesothorax 
  and 
  scutellum 
  large 
  and 
  distinct 
  (but 
  not 
  so 
  

   large 
  as 
  those 
  on 
  vertex), 
  those 
  on 
  mesothorax 
  more 
  or 
  less 
  

   running 
  into 
  strise; 
  area 
  of 
  metathorax 
  granular; 
  hind 
  part 
  

   of 
  mesothorax 
  with 
  a 
  few 
  hardly 
  noticeable 
  brown 
  hairs 
  ; 
  

   tegulse 
  piceous. 
  Wings 
  dusky 
  ; 
  anterior 
  tibise 
  and 
  tarsi 
  

   with 
  bright 
  ferruginous 
  hair 
  on 
  inner 
  side 
  ; 
  hind 
  basitarsi 
  

   broadened 
  and 
  flattened, 
  with 
  red 
  hair 
  on 
  inner 
  side; 
  spurs 
  

   light 
  reddish. 
  Abdomen 
  finely 
  but 
  very 
  distinctly 
  punctured, 
  

   segments 
  2 
  to 
  4 
  very 
  strongly 
  transversely 
  sulcate, 
  the 
  

   punctures 
  beyond 
  the 
  sulcus 
  larger 
  than 
  those 
  before. 
  

  

  Hab. 
  Formosa 
  (Sauter). 
  One 
  female 
  in 
  Berlin 
  Museum. 
  

  

  In 
  Bingham's 
  table 
  of 
  Indian 
  species 
  this 
  runs 
  to 
  

   M. 
  cephalotes, 
  Smith, 
  which 
  has 
  a 
  quite 
  differently 
  shaped 
  

   head. 
  The 
  second 
  and 
  third 
  joints 
  of 
  the 
  maxillary 
  palpi 
  

   are 
  very 
  bristly 
  ; 
  the 
  claws 
  have 
  no 
  basal 
  tooth 
  ; 
  the 
  last 
  

   abdominal 
  segment 
  is 
  higher 
  than 
  long, 
  vertically 
  descending 
  

   until 
  it 
  bends 
  to 
  form 
  the 
  apical 
  lip 
  ; 
  these 
  characters, 
  with 
  

   the 
  narrow 
  form 
  and 
  general 
  structure 
  and 
  appearance, 
  

   justify 
  the 
  inclusion 
  of 
  M. 
  spissula 
  in 
  Robertson's 
  subgenus 
  

   or 
  genus 
  Oligotropus, 
  hitherto 
  known 
  only 
  in 
  the 
  North 
  

   American 
  fauna. 
  

  

  Megachile 
  tranquilla, 
  sp. 
  n. 
  

  

  ? 
  . 
  — 
  Length 
  8-9 
  mm. 
  

  

  Black, 
  with 
  black 
  and 
  white 
  hair, 
  the 
  abdomen 
  with 
  con- 
  

   spicuous 
  narrow 
  entire 
  white 
  hair-bands 
  ; 
  ventral 
  scopa 
  

   white, 
  suffused 
  in 
  the 
  middle 
  with 
  ferruginous, 
  on 
  last 
  

   segment 
  black 
  ; 
  form 
  rather 
  compact 
  ; 
  general 
  appearance 
  

   exactly 
  like 
  the 
  European 
  M. 
  rotundata 
  ; 
  it 
  may 
  be 
  known 
  

   from 
  rotundata, 
  and 
  also 
  from 
  all 
  the 
  closely 
  allied 
  Formosan 
  

   species, 
  by 
  the 
  dense 
  white 
  hair 
  of 
  the 
  front 
  having 
  con- 
  

   spicuous 
  black 
  hairs 
  intermixed. 
  Another 
  very 
  similar 
  

   species 
  is 
  the 
  Australian 
  M. 
  quinquelineata, 
  Ckll., 
  but 
  this 
  

   has 
  the 
  hair 
  on 
  inner 
  side 
  of 
  hind 
  tarsi 
  purplish 
  black, 
  

   whereas 
  in 
  M. 
  tranquilla 
  it 
  is 
  clear 
  ferruginous. 
  Other 
  close 
  

   allies 
  are 
  M. 
  seychellensis, 
  Cam., 
  from 
  the 
  Seychelles 
  Islands, 
  

   and 
  M. 
  palma7'um, 
  Perkins, 
  from 
  the 
  Hawaiian 
  Islands. 
  

  

  Mandibles 
  quadridentate 
  ; 
  hair 
  of 
  head 
  white, 
  black 
  on 
  

   vertex, 
  and 
  mixed 
  with 
  black 
  on 
  front 
  ; 
  clypeus 
  very 
  densely 
  

  

  