﻿214 
  W. 
  A. 
  LAMBORN. 
  — 
  AGRICULTURAL 
  PESTS, 
  NIGERIA. 
  

  

  by 
  various 
  larvae, 
  the 
  chief 
  of 
  which 
  were 
  the 
  larva 
  of 
  the 
  Pterophorid 
  moth, 
  Maras- 
  

   marcha 
  atomosa, 
  Wlsm., 
  that 
  often 
  yielded 
  Braconid 
  parasites, 
  and 
  the 
  larva 
  of 
  the 
  

   Lycaenid 
  butterfly, 
  Lampides 
  boetica, 
  L., 
  The 
  latter, 
  of 
  the 
  usual 
  green 
  onisciform 
  

   type, 
  was 
  guarded 
  by 
  various 
  ants, 
  Camponotus 
  akwapimensis 
  in 
  particular, 
  a 
  group 
  

   of 
  which 
  at 
  the 
  mouth 
  of 
  a 
  tunnel 
  in 
  one 
  of 
  the 
  pods 
  invariably 
  indicated 
  the 
  presence 
  

   of 
  the 
  larva 
  within. 
  Larvae 
  of 
  another 
  undetermined 
  moth 
  were 
  also 
  not 
  uncommon, 
  

   boring 
  in 
  the 
  pods. 
  

  

  The 
  gregarious 
  froghopper, 
  Ptyelus 
  grossus, 
  F., 
  occurred 
  both 
  in 
  the 
  nymphal 
  and 
  

   imaginal 
  states, 
  feeding 
  on 
  the 
  stems, 
  which 
  were 
  so 
  drained 
  that 
  frequently 
  a 
  constant 
  

   stream 
  of 
  fluid 
  trickled 
  to 
  the 
  ground. 
  

  

  Insects 
  Attacking 
  Oil 
  Palms. 
  

  

  A 
  little 
  weevil 
  (Calandra 
  oryzae, 
  L.) 
  was 
  found 
  in 
  some 
  numbers 
  boring 
  in 
  an 
  oil 
  

   palm 
  scorched 
  by 
  repeated 
  bush 
  fires. 
  Evidence 
  that 
  it 
  had 
  reached 
  living 
  tissues 
  

   was 
  shown 
  by 
  the 
  constant 
  dripping 
  of 
  sap, 
  which 
  attracted 
  a 
  host 
  of 
  other 
  insects, 
  

   ants 
  especially, 
  but 
  few 
  of 
  the 
  pests 
  could 
  be 
  obtained 
  owing 
  to 
  the 
  difficulty 
  of 
  getting 
  

   them 
  out 
  of 
  the 
  hard 
  tissues 
  in 
  which 
  they 
  had 
  embedded 
  themselves. 
  

  

  No 
  other 
  pests 
  attacking 
  oil 
  palm 
  were 
  found 
  in 
  Nigeria, 
  but 
  it 
  may 
  be 
  mentioned, 
  

   in 
  passing, 
  that 
  in 
  the 
  course 
  of 
  some 
  entomological 
  investigations 
  on 
  my 
  way 
  home, 
  

   in 
  late 
  May, 
  in 
  Cotonou, 
  Dahomey, 
  weevils 
  in 
  almost 
  incredible 
  numbers 
  were 
  found 
  

   feeding 
  on 
  the 
  fresh 
  male 
  flowers 
  of 
  the 
  palm, 
  hundreds 
  being 
  taken 
  in 
  a 
  few 
  minutes.* 
  

  

  Pests 
  op 
  Sweet 
  Potato. 
  

  

  No 
  pests 
  were 
  found 
  in 
  the 
  field 
  other 
  than 
  the 
  larva 
  of 
  the 
  convolvulus 
  hawkmoth, 
  

   Herse 
  convolvuli, 
  L., 
  which 
  fed 
  on 
  the 
  leaves. 
  The 
  tubers 
  in 
  the 
  store 
  were 
  con- 
  

   siderably 
  attacked 
  by 
  two 
  species 
  of 
  weevils, 
  Cylas 
  brunneus, 
  F., 
  and 
  C. 
  puncticollis, 
  

   Boh., 
  all 
  stages 
  of 
  which 
  could 
  be 
  found 
  in 
  cavities 
  in 
  the 
  substance 
  (Plate 
  xxv, 
  fig. 
  1). 
  

  

  My 
  thanks 
  are 
  due 
  to 
  Mr. 
  Gr. 
  A. 
  K. 
  Marshall, 
  Director 
  of 
  the 
  Imperial 
  Bureau 
  of 
  

   Entomology, 
  for 
  editing 
  the 
  proofs 
  of 
  these 
  notes 
  and 
  for 
  obtaining 
  for 
  me 
  the 
  

   identification 
  of 
  the 
  majority 
  of 
  the 
  insects 
  mentioned. 
  For 
  the 
  identification 
  of 
  

   most 
  of 
  the 
  Lepidoptera 
  I 
  am 
  indebted 
  to 
  Professor 
  E. 
  B. 
  Poulton, 
  F.K.S. 
  

  

  ♦[These 
  weevils 
  all 
  belong 
  to 
  the 
  genus 
  Derelomus, 
  there 
  being 
  no 
  less 
  than 
  four 
  species 
  

   among 
  them. 
  The 
  most 
  abundant 
  was 
  D. 
  kamerunicus, 
  Fst., 
  and 
  the 
  remaining 
  three 
  

   species 
  appear 
  to 
  be 
  undescribed. 
  — 
  Ed.] 
  

  

  