﻿294 
  S. 
  A. 
  NEAVE. 
  

  

  Thriambeutes 
  sp. 
  

  

  A 
  single 
  male 
  of 
  an 
  unidentified 
  species 
  of 
  this 
  genus 
  was 
  captured 
  on 
  the 
  Kola 
  

   River, 
  a 
  little 
  east 
  of 
  Mt. 
  Chiperone, 
  Portuguese 
  East 
  Africa, 
  in 
  November 
  1913. 
  

   It 
  was 
  found 
  on 
  the 
  leaves 
  of 
  a 
  shrub 
  near 
  water. 
  The 
  upper, 
  large 
  facets 
  of 
  the 
  

   eyes 
  are 
  of 
  a 
  greenish 
  gold 
  colour 
  in 
  life, 
  the 
  lower 
  small 
  facets 
  being 
  dusky. 
  

  

  Pangonia 
  oldii, 
  Aust. 
  

  

  Both 
  sexes 
  were 
  captured 
  in 
  some 
  numbers 
  in 
  July 
  on 
  the 
  Mwanza 
  River, 
  Upper 
  

   Shire, 
  where 
  the 
  conditions 
  were 
  distinctly 
  dry. 
  Individuals 
  were 
  somewhat 
  

   inclined 
  to 
  enter 
  tents 
  and 
  the 
  females 
  occasionally 
  attacked 
  the 
  bare 
  skins 
  of 
  

   natives. 
  

  

  Dorcaloemus 
  fodiens, 
  Aust. 
  

  

  A 
  large 
  series 
  of 
  both 
  sexes 
  (the 
  male 
  was 
  formerly 
  described 
  as 
  a 
  distinct 
  species, 
  

   D. 
  bicolor, 
  Aust.) 
  was 
  taken 
  in 
  April 
  not 
  far 
  from 
  Mt. 
  Mlanje, 
  both 
  in 
  British 
  and 
  

   Portuguese 
  territory. 
  The 
  males 
  were 
  in 
  the 
  majority, 
  and 
  between 
  the 
  1st 
  April 
  

   and 
  the 
  2nd 
  May, 
  the 
  only 
  period 
  in 
  the 
  year 
  during 
  which 
  they 
  were 
  on 
  the 
  wing, 
  

   74 
  males 
  and 
  28 
  females 
  were 
  captured. 
  

  

  Two 
  or 
  three 
  attempts 
  were 
  made 
  to 
  keep 
  these 
  flies 
  in 
  captivity, 
  and 
  they 
  were 
  

   provided 
  with 
  damp 
  earth, 
  flowers, 
  honey, 
  etc. 
  They 
  could 
  not, 
  however, 
  be 
  

   induced 
  to 
  feed 
  or 
  oviposit 
  and 
  death 
  took 
  place 
  in 
  from 
  two 
  to 
  four 
  days. 
  Life 
  

   was 
  prolonged 
  if 
  their 
  cages 
  were 
  placed 
  in 
  the 
  sun 
  for 
  part 
  of 
  each 
  day. 
  

  

  Some 
  examples 
  of 
  what 
  may 
  be 
  the 
  larvae 
  of 
  this 
  species 
  were 
  found, 
  though 
  

   the 
  point 
  could 
  not 
  be 
  decided, 
  as 
  I 
  was 
  obliged 
  to 
  leave 
  before 
  they 
  reached 
  

   maturity. 
  They 
  were 
  captured 
  during 
  December, 
  January 
  and 
  February 
  in 
  some 
  

   swampy 
  ground 
  on 
  which 
  a 
  patch 
  of 
  maize 
  was 
  growing. 
  These 
  larvae 
  were 
  of 
  

   fair 
  size, 
  some 
  30 
  mm. 
  in 
  length 
  ; 
  the 
  syphon 
  was 
  very 
  short 
  and 
  had 
  a 
  distinct 
  

   pigmented 
  ring 
  on 
  the 
  anal 
  segment 
  resembling 
  that 
  in 
  Haematopota 
  larvae. 
  In 
  the 
  

   more 
  mature 
  specimens 
  traces 
  of 
  intersegmental 
  pigment 
  were 
  present. 
  

  

  At 
  the 
  time 
  these 
  larvae 
  were 
  captured 
  no 
  other 
  larvae 
  of 
  so 
  large 
  a 
  species 
  were 
  

   obtainable, 
  and 
  as 
  D. 
  fodiens 
  is 
  the 
  only 
  large 
  Tabanid 
  which 
  is 
  on 
  the 
  wing 
  in 
  the 
  

   neighbourhood 
  in 
  March 
  and 
  April, 
  there 
  are 
  some 
  grounds 
  for 
  thinking 
  that 
  the 
  

   larvae 
  belonged 
  to 
  that 
  species. 
  

  

  Silvius 
  apiformis, 
  sp. 
  nov. 
  

  

  This 
  very 
  remarkable 
  species, 
  which 
  is 
  only 
  provisionally 
  placed 
  in 
  this 
  genus, 
  

   bears 
  a 
  striking 
  resemblance 
  to 
  a 
  large 
  hive-bee 
  of 
  the 
  golden 
  type 
  usual 
  in 
  

   Central 
  Africa. 
  

  

  <J. 
  Length 
  (one 
  individual), 
  14 
  mm. 
  ; 
  length 
  of 
  wing, 
  12 
  mm. 
  

  

  §. 
  Length 
  (twelve 
  individuals), 
  average, 
  13*5 
  mm. 
  ; 
  length 
  of 
  wing, 
  average, 
  

  

  11*1 
  mm. 
  

  

  <J 
  $. 
  Head 
  with 
  a 
  very 
  broad 
  front 
  in 
  the 
  $ 
  (fig. 
  1), 
  the 
  eyes 
  being 
  widely 
  separated, 
  

  

  covered 
  with 
  long 
  hairs, 
  dusky 
  around 
  the 
  ocellar 
  triangle 
  and 
  fading 
  to 
  a 
  pale 
  

  

  buff 
  toward 
  the 
  base 
  of 
  the 
  antennae 
  ; 
  the 
  whole 
  of 
  the 
  peristome 
  also 
  covered 
  

  

  with 
  long 
  hairs 
  of 
  a 
  pale 
  buff 
  colour. 
  Palpi 
  fawn. 
  Antennae 
  (fig. 
  2, 
  a) 
  short 
  and 
  stout, 
  

  

  