﻿64 
  REPORT 
  UNITED 
  STATES 
  ENTOMOLOGICAL 
  COMMISSION. 
  

  

  rius 
  of 
  Forskal 
  and 
  Mebuhr 
  seen 
  in 
  Arabia 
  was 
  evidently 
  A. 
  peregrinum, 
  

   as 
  were 
  the 
  locusts 
  encountered 
  by 
  Palgrave 
  on 
  the 
  Hasa 
  plains. 
  The 
  

   species 
  seen 
  by 
  Morier 
  migrating 
  in 
  Southern 
  Persia 
  was 
  not 
  P. 
  migra- 
  

   torius. 
  The 
  species 
  seen 
  by 
  Salt 
  at 
  Bombay, 
  which 
  he 
  asserts 
  is 
  the 
  

   same 
  as 
  that 
  observed 
  on 
  the 
  coast 
  of 
  Abyssinia, 
  is 
  described 
  as 
  follows, 
  

   and 
  is 
  certainly 
  different 
  from 
  the 
  P. 
  migratorius 
  : 
  

  

  The 
  head 
  and 
  shoulders 
  of 
  the 
  insect 
  are 
  armed 
  with 
  a 
  thick 
  shell 
  or 
  case 
  ; 
  that 
  of 
  

   the 
  head 
  has 
  a 
  dull 
  leaden 
  gray 
  color 
  when 
  alive, 
  interrupted 
  with 
  red; 
  the 
  shoulder 
  

   plate 
  heing 
  of 
  a 
  reddish 
  brown, 
  spotted 
  with 
  white, 
  smooth 
  in 
  front, 
  and 
  rough 
  on 
  

   the 
  hinder 
  part 
  ; 
  the 
  eye 
  is 
  bright 
  yellow, 
  with 
  three 
  black 
  bars 
  across 
  it 
  ; 
  feelers 
  or 
  

   horns 
  black; 
  the 
  wings 
  [elytra, 
  we 
  suppose] 
  are 
  of 
  a 
  yellowish-brown, 
  lower 
  part 
  tinged 
  

   with 
  a 
  fine 
  purple, 
  and 
  the 
  whole 
  obscurely 
  dotted 
  with 
  black. 
  The 
  legs 
  are 
  exter- 
  

   nally 
  of 
  a 
  leaden 
  gray 
  color, 
  the 
  upper 
  part 
  shading 
  off 
  into 
  black; 
  the 
  ribs 
  also 
  

   deep 
  black, 
  inside 
  of 
  second 
  joint 
  bright 
  purple, 
  and 
  the 
  thorns 
  scarlet, 
  tipped 
  with 
  

   black 
  ; 
  the 
  extremities 
  being 
  formed 
  of 
  triangular 
  shells 
  formed 
  of 
  two 
  sharp 
  claws 
  

   and 
  a 
  knob 
  in 
  the 
  center, 
  smooth 
  and 
  round. 
  

  

  The 
  figure 
  in 
  the 
  plate 
  is 
  evidently 
  a 
  female 
  Acridium; 
  at 
  least 
  the 
  

   thorax, 
  wings, 
  and 
  abdomen 
  would 
  indicate 
  this. 
  

  

  In 
  a 
  note 
  to 
  Mr. 
  Thomas, 
  Mr. 
  S. 
  H. 
  Scudder 
  suggests 
  that 
  it 
  may 
  be 
  

   the 
  Acridium 
  JEgyptium 
  of 
  Linneaus 
  ; 
  but 
  this, 
  according 
  to 
  Stal, 
  164 
  is 
  

   synonomous 
  with 
  Gryllus 
  lineola, 
  Thunb 
  165 
  and 
  A. 
  tartaricum 
  Eisch. 
  166 
  

   (not 
  G. 
  tartaricus 
  Linn). 
  

  

  Fischer 
  has 
  doubtless 
  included 
  two 
  or 
  three 
  species 
  under 
  his 
  A. 
  tar- 
  

   taricum. 
  

  

  Charpentier, 
  167 
  who 
  separated 
  A. 
  lineola 
  with 
  some 
  doubt, 
  remarks, 
  un- 
  

   der 
  the 
  latter, 
  that 
  Gerinar 
  informs 
  him 
  in 
  letters 
  that 
  this 
  species 
  is 
  

   found 
  in 
  the 
  East 
  Indies. 
  It 
  is 
  also 
  more 
  than 
  probable 
  that 
  it 
  has 
  

   been 
  included 
  by 
  some 
  authors 
  under 
  A. 
  succinctum 
  also, 
  especially 
  those 
  

   examples 
  from 
  the 
  East 
  Indies. 
  The 
  remark 
  in 
  the 
  South 
  Australian 
  

   Register 
  also 
  agrees 
  with 
  Salt's 
  statement. 
  

  

  Wahl, 
  it 
  is 
  true, 
  affirms 
  that 
  swarms 
  of 
  P. 
  migratorius 
  are 
  seen 
  in 
  

   India, 
  but 
  also 
  adds 
  that 
  another 
  species, 
  a 
  kind 
  of 
  yellow 
  locusts, 
  called 
  

   Tscheddy, 
  often 
  covers 
  whole 
  fields 
  and 
  darkens 
  the 
  air 
  like 
  a 
  cloud. 
  

   Major 
  Moor 
  asserts 
  that 
  the 
  destructive 
  species 
  of 
  this 
  country 
  is 
  " 
  blood- 
  

   red 
  v 
  and 
  not 
  the 
  P. 
  migratorius. 
  That 
  the 
  locust 
  infesting 
  the 
  Phi- 
  

   lippine 
  Islands 
  is 
  not 
  the 
  latter 
  species 
  is 
  clear 
  from 
  the 
  statements 
  

   of 
  Gironiere 
  and 
  Jagor 
  and 
  the 
  figure 
  given 
  by 
  the 
  former 
  traveler 
  j 
  

   whether 
  it 
  is 
  an 
  Acridium 
  or 
  an 
  (Edipoda 
  is 
  a 
  matter 
  of 
  doubt. 
  

  

  These 
  facts, 
  together 
  with 
  our 
  knowledge 
  of 
  the 
  general 
  laws 
  that 
  

   govern 
  Acridian 
  life, 
  lead 
  us 
  to 
  the 
  conclusion 
  that 
  although 
  P. 
  migra- 
  

   torius 
  is 
  found 
  in 
  this 
  part 
  of 
  tropical 
  Asia, 
  yet 
  that 
  A. 
  peregrinum 
  is 
  

   really 
  the 
  prevailing 
  migratory 
  species. 
  

  

  Is 
  it 
  found 
  in 
  Africa 
  as 
  a 
  migratory 
  species 
  ? 
  Judging 
  from 
  all 
  the 
  

   data 
  we 
  have 
  been 
  able 
  to 
  obtain, 
  we 
  are 
  convinced 
  it 
  is 
  not. 
  

  

  164 
  " 
  Recensio 
  Orthopterorum," 
  I, 
  63. 
  

   i66Mem. 
  Acad. 
  Pet., 
  5, 
  p. 
  247, 
  1815. 
  

   »««Orthop. 
  Europe., 
  388. 
  

   167 
  Horae 
  Entomologicae, 
  131. 
  

  

  