﻿46 
  

  

  A. 
  C. 
  BAKER. 
  

  

  nephrolepidis 
  to 
  be 
  identical 
  and 
  treats 
  the 
  species 
  as 
  a 
  native 
  of 
  the 
  Hawaiian 
  Islands 
  

   imported 
  into 
  the 
  United 
  States. 
  While 
  this 
  view 
  may 
  be 
  correct, 
  the 
  figures 
  given 
  

   by 
  Fullaway 
  do 
  not 
  agree, 
  as 
  far 
  as 
  the 
  cornicles 
  are 
  concerned, 
  with 
  any 
  specimens 
  

   of 
  nephrolepidis. 
  They 
  do 
  agree, 
  however, 
  in 
  being 
  swollen 
  somewhat 
  like 
  those 
  of 
  

   Micromyzus 
  nigrum, 
  V. 
  d. 
  Goot, 
  1916. 
  We 
  have 
  been 
  unable 
  to 
  study 
  the 
  type 
  of 
  

   the 
  species, 
  and 
  since 
  Essig's 
  view 
  is 
  a 
  surmise, 
  we 
  consider 
  kirhaldyi 
  to 
  be 
  distinct 
  

   from 
  nephrolepidis 
  as 
  indicated 
  by 
  Fulla 
  way's 
  figures.. 
  

  

  The 
  genus 
  Micromyzus 
  was 
  erected 
  by 
  Van 
  der 
  Goot 
  for 
  his 
  new 
  form, 
  nigrum 
  

   (fig. 
  16) 
  (Cont. 
  a 
  la 
  Fauna 
  des 
  Indes 
  Neerland. 
  i, 
  fasc. 
  3, 
  p. 
  52, 
  1916). 
  M. 
  nigrum 
  is 
  

   undoubtedly 
  closely 
  related 
  to 
  kirkaldyi, 
  if 
  Fullaway's 
  figures 
  are 
  correct, 
  and 
  is 
  

   congeneric 
  with 
  it. 
  Micromyzus 
  must 
  therefore 
  fall 
  for 
  Fullaivayella. 
  

  

  One 
  other 
  genus 
  which 
  evidently 
  belongs 
  to 
  this 
  group 
  has 
  been 
  described 
  (Patch, 
  

   Ent. 
  News, 
  xx, 
  p. 
  338, 
  1909). 
  This 
  is 
  Microparsus, 
  with 
  variabilis 
  Patch 
  (fig. 
  14) 
  as 
  

   type, 
  a 
  form 
  which 
  was 
  first 
  figured 
  and 
  described 
  by 
  Sanborn 
  but 
  not 
  named 
  by 
  him. 
  

   This 
  species, 
  like 
  the 
  others 
  in 
  the 
  group, 
  shows 
  aberrations. 
  

  

  The 
  different 
  genera 
  and 
  species 
  may 
  be 
  separated 
  as 
  follows 
  : 
  — 
  ■ 
  

  

  1 
  — 
  Forewing 
  with 
  a 
  constant 
  closed 
  cell 
  

  

  a 
  — 
  Veins 
  heavily 
  bordered 
  . 
  . 
  

  

  a 
  1 
  — 
  Veins 
  not 
  heavily 
  bordered 
  

   l 
  1 
  — 
  Forewing 
  typically 
  without 
  such 
  cell 
  

   2 
  — 
  Hind 
  wing 
  with 
  one 
  vein 
  only 
  

  

  a 
  — 
  One 
  species 
  only 
  . 
  . 
  

   2 
  1 
  — 
  Hind 
  wing 
  typically 
  with 
  more 
  than 
  one 
  vein 
  

   3 
  — 
  Cornicles 
  cylindrical 
  

  

  a— 
  One 
  species 
  only 
  . 
  . 
  

   3 
  1 
  — 
  Cornicles 
  more 
  or 
  less 
  swollen 
  

  

  a 
  — 
  Cornicles 
  broadly 
  swollen 
  

  

  a 
  1 
  — 
  Cornicles 
  slightly 
  swollen 
  

  

  b 
  — 
  Cornicles 
  very 
  broadly 
  swollen 
  and 
  distinctly 
  

   reticulate 
  near 
  distal 
  extremitv 
  

  

  b 
  1 
  — 
  Cornicles 
  moderately 
  swollen 
  and 
  not 
  reticu- 
  

   late 
  near 
  distal 
  extremity 
  

  

  c 
  — 
  Segment 
  iv 
  of 
  antenna 
  without 
  sensoria 
  

  

  c 
  1 
  — 
  Segment 
  iv 
  of 
  antenna 
  with 
  3-5 
  sensoria 
  

   Of 
  the 
  species 
  in 
  the 
  key 
  only 
  two, 
  violae, 
  Perg., 
  and 
  nephrolepidis, 
  Davis, 
  have 
  been 
  

   studied 
  with 
  a 
  view 
  toward 
  determining 
  the 
  commonly 
  present 
  aberrations. 
  If 
  the 
  

   opportunity 
  to 
  study 
  other 
  species 
  in 
  this 
  way 
  should 
  arise, 
  it 
  is 
  not 
  improbable 
  

   that 
  other 
  names 
  would 
  sink 
  in 
  synonomy. 
  This 
  brings 
  up 
  again 
  the 
  question 
  of 
  

   the 
  advisability 
  of 
  retaining 
  a 
  name, 
  in 
  a 
  lower 
  category 
  than 
  a 
  species, 
  for 
  an 
  aber- 
  

   ration 
  or 
  of 
  giving 
  names 
  to 
  such 
  forms 
  if 
  undescribed. 
  In 
  some 
  groups 
  of 
  the 
  

   Aphididae 
  these 
  forms 
  are 
  remarkably 
  abundant 
  and 
  their 
  naming 
  would 
  place 
  in 
  the 
  

   literature 
  an 
  almost 
  endless 
  series 
  of 
  designations. 
  If, 
  however, 
  certain 
  of 
  these 
  forms 
  

   were 
  found 
  constantly 
  in 
  certain 
  regions 
  (as 
  for 
  example 
  if 
  the 
  violae 
  of 
  Theobald, 
  

   as 
  he 
  believes, 
  is 
  a 
  somewhat 
  fixed 
  African 
  form) 
  it 
  would 
  seem 
  advisable 
  for 
  the 
  sake 
  

   of 
  convenience 
  to 
  use 
  some 
  designation 
  for 
  them. 
  

  

  Pentalonia. 
  

  

  nigronervosa, 
  Cql. 
  

  

  caladii, 
  V. 
  d. 
  Goot. 
  

  

  2. 
  

  

  Microparsus. 
  

  

  variabilis, 
  Patch. 
  

  

  3. 
  

  

  Idiopterus. 
  

  

  nephrolepidis, 
  Davis. 
  

  

  Fullawayella. 
  

  

  b. 
  

  

  c. 
  

  

  tidipaella 
  (Theo.) 
  

  

  violae 
  (Perg.) 
  

   kirkaldyi 
  (Fullaway). 
  

   nigrum 
  (V. 
  d. 
  Goot). 
  

  

  