﻿IDENTIFICATION 
  OF 
  SOME 
  FIG 
  INSECTS 
  FROM 
  THE 
  BRITISH 
  MUSEUM. 
  297 
  

  

  base 
  of 
  the 
  wing 
  and 
  the 
  point 
  of 
  the 
  costal 
  margin, 
  where 
  there 
  is 
  a 
  group 
  of 
  three 
  

   hamuli. 
  Bristles 
  as 
  in 
  the 
  figure. 
  

  

  Fore 
  legs 
  (fig. 
  1, 
  8 
  ) 
  with 
  the 
  femur 
  about 
  twice 
  as 
  long 
  as 
  its 
  greatest 
  width 
  ; 
  tibia 
  

   a 
  little 
  less 
  than 
  half 
  the 
  femur 
  and 
  provided 
  on 
  its 
  external 
  aspect 
  with 
  a 
  tridentate 
  

   process 
  ; 
  tarsus 
  about 
  one 
  and 
  a 
  half 
  times 
  as 
  long 
  as 
  the 
  tibia, 
  and 
  its 
  first 
  joint 
  half 
  

   the 
  length 
  of 
  the 
  tibia 
  ; 
  pretarsus 
  and 
  bristles 
  as 
  in 
  figure. 
  Middle 
  legs 
  (fig. 
  1, 
  9 
  - 
  l0 
  ) 
  

   with 
  the 
  trochanter 
  slightly 
  shorter 
  than 
  the 
  coxa, 
  or 
  about 
  one-third 
  the 
  length 
  of 
  

   femur 
  ; 
  tibia 
  longer 
  than 
  femur 
  and 
  provided 
  at 
  the 
  distal 
  extremity 
  of 
  its 
  ventral 
  

   margin 
  with 
  a 
  lancet-like 
  spur 
  which 
  is 
  one-sixth 
  its 
  length 
  ; 
  tarsus 
  a 
  little 
  shorter 
  than 
  

   tibia 
  ; 
  second 
  and 
  third 
  joint 
  equal 
  and 
  a 
  little 
  shorter 
  than 
  the 
  first 
  ; 
  fourth 
  shortest 
  

   of 
  all 
  ; 
  the 
  fifth 
  the 
  longest 
  ; 
  pretarsus 
  and 
  bristles 
  as 
  in 
  figures. 
  Hind 
  legs 
  (fig. 
  1, 
  

   11_l3 
  ) 
  : 
  coxa 
  as 
  long 
  as 
  femur 
  or 
  slightly 
  shorter 
  ; 
  femur 
  with 
  dorsal 
  margin 
  strongly 
  

   convex 
  and 
  broadly 
  rounded 
  ; 
  tibia 
  just 
  shorter 
  than 
  femur 
  and 
  provided 
  with 
  a 
  very 
  

   conspicuous 
  compound 
  tridentate 
  armature 
  situated 
  at 
  the 
  distal 
  extremity 
  of 
  its 
  

   exterior 
  aspect 
  and 
  with 
  a 
  sublaminar 
  and 
  bifid 
  terminal 
  spine 
  (fig. 
  1, 
  11_l3 
  ). 
  The 
  

   femur 
  and 
  tibia 
  show 
  a 
  very 
  interesting 
  reciprocating 
  mechanical 
  arrangement. 
  

   Towards 
  the 
  distal 
  extremity 
  of 
  the 
  ventral 
  margin 
  of 
  the 
  femur 
  there 
  is 
  an 
  angular 
  

   projection 
  strengthened 
  by 
  a 
  chitinous 
  thickening, 
  which 
  is 
  prolonged 
  proximally, 
  

   thinning 
  out 
  beyond 
  the 
  middle 
  of 
  the 
  femur 
  and 
  running 
  in 
  a 
  submarginal 
  direction. 
  

   This 
  projection 
  is 
  followed 
  by 
  an 
  abrupt 
  concavity 
  of 
  the 
  margin 
  and 
  then 
  by 
  a 
  round 
  

   process. 
  The 
  tibia 
  in 
  the 
  proximal 
  half 
  of 
  its 
  ventral 
  margin 
  has 
  a 
  rounded 
  projection, 
  

   limited 
  proximally 
  and 
  distally 
  by 
  two 
  slight 
  convexities 
  (fig. 
  1, 
  l2 
  ). 
  Tarsus 
  twice 
  as 
  

   long 
  as 
  the 
  tibia 
  ; 
  the 
  length 
  of 
  the 
  first 
  joint 
  equal 
  to 
  three-quarters 
  that 
  of 
  the 
  tibia 
  

   and 
  of 
  the 
  free 
  ventral 
  margin 
  of 
  second, 
  third, 
  and 
  fourth 
  joints 
  taken 
  together 
  ; 
  

   fourth 
  joint 
  shortest 
  of 
  all 
  ; 
  fifth 
  about 
  as 
  long 
  as 
  the 
  second 
  ; 
  pretarsus 
  and 
  bristles 
  

   as 
  in 
  figure. 
  

  

  Abdomen. 
  Urotergites 
  sparsely 
  pilose. 
  Cercoids 
  of 
  the 
  ninth 
  urotergite 
  with 
  four 
  

   bristles, 
  which 
  are 
  longer 
  than 
  the 
  appendage, 
  one 
  of 
  them 
  being 
  twice 
  as 
  long. 
  

   Projecting 
  portion 
  of 
  terebra 
  a 
  little 
  less 
  than 
  one 
  and 
  a 
  half 
  times 
  as 
  long 
  as 
  the 
  

   abdomen. 
  

  

  Geograpliical 
  distribution. 
  Three 
  specimens 
  mounted 
  in 
  Canada 
  balsam 
  from 
  

   Ceylon, 
  collected 
  by 
  Dr. 
  Thwaites 
  in 
  the 
  receptaculi 
  of 
  Fiats 
  rcligiosa, 
  forming 
  part 
  

   of 
  the 
  material 
  examined 
  by 
  Westwood, 
  who 
  says, 
  on 
  p. 
  43 
  of 
  his 
  " 
  Further 
  Descrip- 
  

   tions 
  of 
  Insects 
  infesting 
  Figs 
  " 
  (Trans. 
  Ent. 
  Soc, 
  London, 
  1883, 
  pp. 
  29-47) 
  : 
  " 
  1. 
  Both 
  

   sexes 
  of 
  a 
  species 
  of 
  Blastophaga, 
  of 
  which 
  the 
  antennae 
  of 
  the 
  female 
  are 
  stronglv 
  

   clavate, 
  with 
  the 
  terminal 
  joints 
  armed 
  with 
  very 
  strong 
  compressed 
  bristles." 
  

  

  Observations. 
  Mayr's 
  material 
  came 
  from 
  Singapore, 
  and 
  was 
  collected 
  by 
  Count 
  

   Solms-Laubach. 
  This 
  author's 
  description 
  of 
  the 
  9 
  is 
  very 
  superficial. 
  

  

  Blastophaga 
  williamsi, 
  sp. 
  n. 
  

  

  9- 
  Colour 
  of 
  body 
  smoky-brown. 
  Antennae 
  from 
  the 
  fifth 
  joint 
  honey-brown. 
  

   Mandibles 
  ferruginous. 
  Legs 
  honey-coloured, 
  more 
  or 
  less 
  infuscated. 
  

  

  Measurements. 
  Length 
  of 
  head, 
  0-33 
  mm. 
  ; 
  width, 
  0-35 
  mm. 
  ; 
  length 
  of 
  thorax, 
  

   including 
  propodeon, 
  0-60 
  mm. 
  ; 
  length 
  of 
  abdomen, 
  0-57 
  mm. 
  ; 
  length 
  of 
  projecting 
  

   portion 
  of 
  terebra, 
  0-50-0-60 
  mm. 
  ; 
  width 
  of 
  the 
  peritremes 
  of 
  the 
  tracheal 
  spiracles 
  

   of 
  the 
  eighth 
  urotergite, 
  0-035 
  mm. 
  

  

  Head 
  (fig. 
  2, 
  x 
  ) 
  a 
  little 
  wider 
  than 
  long 
  and 
  slightly 
  developed 
  behind 
  the 
  

   compound 
  eyes 
  ; 
  its 
  lateral 
  margins 
  in 
  front 
  of 
  the 
  eyes 
  equal 
  in 
  length 
  to 
  the 
  greatest 
  

   diameter 
  of 
  the 
  eyes 
  and 
  rather 
  converging 
  anteriorly. 
  The 
  epistomal 
  edge 
  with 
  a 
  

   median 
  angular 
  and 
  two 
  submedian 
  broadly 
  rounded 
  prominences 
  ; 
  eyes 
  moderate, 
  

   subposterior, 
  three 
  ocelli 
  placed 
  on 
  the 
  vertex 
  in 
  a 
  very 
  obtuse 
  triangle 
  ; 
  hairs 
  and 
  

   bristles 
  as 
  in 
  figure. 
  Antennae 
  (fig. 
  2, 
  2 
  - 
  3 
  ) 
  of 
  eleven 
  joints, 
  of 
  which 
  the 
  last 
  three 
  

   form 
  the 
  club. 
  Scape 
  about 
  one 
  and 
  a 
  half 
  times 
  as 
  long 
  as 
  its 
  greatest 
  width 
  ; 
  second 
  

   joint 
  as 
  in 
  figure 
  ; 
  the 
  third 
  divided 
  into 
  two 
  parts, 
  one 
  proximal, 
  somewhat 
  ring-like, 
  

  

  