﻿586 
  Miss 
  S. 
  L. 
  M. 
  Summers 
  on 
  a 
  new 
  

  

  and 
  prosternum 
  ochraceous 
  ; 
  abdomen 
  beneath 
  with 
  a 
  central 
  

   and 
  marginal 
  series 
  of 
  pale 
  ochraceous 
  spots; 
  antennae 
  

   ochraceous, 
  first 
  joint 
  very 
  long, 
  moderated 
  clavate 
  and 
  

   castaneous 
  at 
  apex, 
  second 
  and 
  fourth 
  subequal 
  in 
  length, 
  

   each 
  distinctly 
  shorter 
  than 
  third, 
  extreme 
  apices 
  of 
  second 
  

   and 
  third 
  black, 
  fourth 
  black 
  or 
  piceous, 
  simulated 
  with 
  pale 
  

   ochraceous 
  near 
  base; 
  pronotum 
  (excluding 
  apical 
  area) 
  

   thickly 
  coarsely 
  granulose, 
  with 
  a 
  somewhat 
  obscure 
  central 
  

   longitudinal 
  ridge, 
  the 
  posterior 
  angles 
  moderately 
  laminatcly 
  

   lobate 
  ; 
  scutellum 
  distinctly, 
  centrally, 
  longitudinally 
  ridged, 
  

   the 
  apex 
  acute 
  ; 
  membrane 
  shining 
  bronzy, 
  not 
  reaching 
  the 
  

   abdominal 
  apex 
  ; 
  legs 
  ochraceous, 
  apices 
  of 
  the 
  femora 
  

   distinctly 
  clavate 
  and 
  castaneous, 
  tarsi 
  with 
  the 
  basal 
  joint 
  

   pale 
  ochraceous, 
  remainder 
  piceous. 
  

  

  Long. 
  8 
  mm. 
  

  

  Hub. 
  N. 
  Australia; 
  Port 
  Darwin 
  (./. 
  J. 
  Walker, 
  Brit. 
  Mus.). 
  

  

  This 
  species 
  was 
  taken 
  during 
  the 
  voyage 
  of 
  H.M.S. 
  

   ' 
  Penguin/ 
  

  

  LXVI. 
  — 
  JSotes 
  from 
  the 
  Entomological 
  Department 
  of 
  the 
  

   London 
  School 
  of 
  Tropical 
  Medicine. 
  — 
  No. 
  II. 
  Description 
  

   of 
  a 
  ncio 
  Species 
  of 
  Simulium 
  from 
  the 
  Siamese 
  Hills. 
  

   By 
  Miss 
  Sophia 
  L. 
  M. 
  Summers, 
  M.A., 
  B.Sc. 
  

  

  Simulium 
  nigrogllvum, 
  sp. 
  n. 
  

  

  Numerous 
  specimens 
  of 
  this 
  fly 
  were 
  sent, 
  very 
  kindly, 
  to 
  

   the 
  London 
  School 
  of 
  Tropical 
  Medicine 
  by 
  Dr. 
  Kerr, 
  of 
  

   Chiengmai. 
  They 
  were 
  collected 
  by 
  Mr. 
  H. 
  B. 
  G. 
  Garrett, 
  

   of 
  the 
  Siamese 
  Forest 
  Department, 
  on 
  the 
  hills 
  of 
  Siam 
  east 
  

   of 
  the 
  Menam, 
  during 
  the 
  months 
  of 
  September 
  and 
  October. 
  

  

  In 
  view 
  of 
  Dr. 
  Sambon's 
  theory, 
  that 
  Simulium 
  plays 
  an 
  

   important 
  part 
  in 
  the 
  spreading 
  of 
  pellagra, 
  every 
  reference 
  

   to 
  this 
  genus 
  is 
  of 
  interest. 
  Only 
  two 
  species 
  of 
  the 
  genus 
  as 
  

   yet 
  have 
  been 
  described 
  from 
  the 
  Oriental 
  Region, 
  namely 
  

   Simulium 
  indicum, 
  Becher, 
  from 
  the 
  Himalayas 
  (Journ. 
  

   Asiat. 
  Soc. 
  Bengal, 
  liii. 
  pt. 
  2 
  (1881) 
  p. 
  199, 
  pi. 
  xiv.), 
  and 
  

   Simulium 
  nobile, 
  Meijere, 
  from 
  Java 
  (Tijdschrift 
  voor 
  Ent. 
  

   Deell. 
  (1907) 
  p. 
  206). 
  

  

  The 
  new 
  form, 
  Simulium 
  nigrogilvum, 
  is 
  a 
  very 
  striking- 
  

   species. 
  Its 
  colouring 
  is 
  most 
  vivid, 
  almost 
  wasp-like 
  in 
  its 
  

   contrasts. 
  It 
  is 
  large, 
  its 
  length 
  being 
  almost 
  3'5 
  mm. 
  Its 
  

   head 
  and 
  thorax 
  are 
  velvety 
  black, 
  with 
  bright 
  golden 
  hairs. 
  

  

  