﻿BEETLE 
  FAMILY 
  CEPHALOIDAE 
  — 
  ARNETT 
  159 
  

  

  poor 
  specimen. 
  Casey 
  was 
  certainly 
  justified 
  in 
  wanting 
  to 
  describe 
  

   this 
  specimen 
  for 
  he 
  beheved 
  that 
  it 
  lacked 
  the 
  comblil\:e 
  claws 
  charac- 
  

   teristic 
  of 
  the 
  other 
  species 
  in 
  the 
  family, 
  and 
  therefore, 
  its 
  description, 
  

   even 
  though 
  based 
  on 
  a 
  single 
  specimen, 
  would 
  alert 
  collectors 
  to 
  hunt 
  

   for 
  such 
  a 
  strange 
  cephaloid. 
  A 
  close 
  examination, 
  however, 
  reveals 
  it 
  

   to 
  have 
  been 
  patched, 
  the 
  legs 
  being 
  undoubtedly 
  from 
  some 
  other 
  

   beetle. 
  It 
  appears 
  to 
  be 
  Cephaloon 
  bicolor 
  Horn, 
  with 
  which 
  I 
  synony- 
  

   mize 
  it. 
  

  

  The 
  genus 
  Ephamillus 
  Semenow 
  is 
  based 
  ^; 
  on 
  the 
  same 
  variable 
  

   characters 
  possessed 
  by 
  the 
  other 
  genera 
  erected 
  for 
  species 
  of 
  this 
  

   family. 
  K6no 
  (Fauna 
  Nipponica, 
  vol. 
  10, 
  fasc. 
  8, 
  No. 
  10, 
  pp. 
  76-82, 
  

   1937) 
  illustrates 
  three 
  characters, 
  which, 
  if 
  they 
  were 
  constant 
  and 
  as 
  

   illustrated, 
  would 
  serve 
  for 
  recognition 
  of 
  a 
  genus. 
  However, 
  none 
  of 
  

   them 
  appears 
  to 
  be 
  constant 
  or 
  as 
  distinctive 
  as 
  thought 
  by 
  Kono 
  and 
  

   others. 
  The 
  acute 
  pulvilli, 
  curved 
  at 
  the 
  tips, 
  are 
  found 
  in 
  three 
  

   species, 
  C. 
  jpacificum, 
  C. 
  ungulare, 
  and 
  C. 
  variabilis. 
  The 
  shape 
  of 
  the 
  

   pronotum, 
  as 
  illustrated 
  by 
  Kono 
  for 
  C. 
  variabilis, 
  is 
  subject 
  to 
  the 
  

   same 
  sort 
  of 
  variation 
  in 
  all 
  the 
  species. 
  Finally, 
  the 
  sinuation 
  of 
  the 
  

   hind 
  tibia 
  of 
  G. 
  variabilis, 
  reported 
  to 
  be 
  so 
  pronounced 
  that 
  a 
  portion 
  

   of 
  the 
  tibia 
  is 
  thrown 
  out 
  of 
  line 
  at 
  least 
  a 
  distance 
  equal 
  to 
  the 
  width 
  

   of 
  the 
  tibia, 
  is 
  often 
  barely 
  perceptible 
  even 
  under 
  a 
  microscope, 
  and 
  

   on 
  some 
  specimens 
  of 
  the 
  species 
  it 
  cannot 
  be 
  seen 
  at 
  all. 
  For 
  these 
  

   reasons, 
  I 
  feel 
  that 
  this 
  genus 
  is 
  invalid 
  and 
  I 
  place 
  it 
  in 
  synonymy 
  

   with 
  Cephaloon. 
  

  

  The 
  marginate 
  pronotum 
  eliminates 
  the 
  genus 
  Stenocephaloon 
  Pic, 
  

   1932 
  (Melanges 
  Exotico-Entomologiques, 
  fasc. 
  59, 
  p. 
  2; 
  genotype, 
  

   Stenocephaloon 
  metallicum 
  Pic, 
  monobasic) 
  from 
  this 
  family. 
  Until 
  

   specimens 
  can 
  be 
  studied, 
  it 
  is 
  best 
  placed 
  in 
  the 
  family 
  Serropalpidae 
  

   near 
  the 
  genus 
  Stenotrachelus 
  Berthold. 
  

  

  The 
  following 
  key 
  to 
  the 
  known 
  species 
  of 
  this 
  family 
  is 
  adapted 
  

   from 
  Hopping 
  and 
  Hopping 
  (Pan-Pacific 
  Ent., 
  vol. 
  10, 
  pp. 
  64-70, 
  

   1934) 
  . 
  For 
  identification 
  purposes, 
  the 
  illustrations 
  which 
  accompany 
  

   that 
  paper 
  are 
  very 
  useful. 
  

  

  Key 
  to 
  the 
  species 
  of 
  Cephaloidae 
  

  

  1. 
  Pulvilli 
  of 
  tarsal 
  claws 
  slender, 
  acute, 
  and 
  curved 
  at 
  tips 
  (pi. 
  5, 
  fig. 
  12) 
  2 
  

  

  Pulvilli 
  of 
  tarsal 
  claws 
  robust, 
  obtuse, 
  not 
  curved 
  at 
  tips 
  (pi. 
  5, 
  figs. 
  10, 
  11) 
  _ 
  4 
  

  

  2. 
  Three 
  distal 
  antenoal 
  segments 
  together 
  approximately 
  3 
  mm. 
  long; 
  hind 
  

  

  femora 
  at 
  most 
  simply 
  curved; 
  1 
  to 
  15 
  mm. 
  (United 
  States) 
  3 
  

  

  Three 
  distal 
  antennal 
  segments 
  together 
  not 
  over 
  1.5 
  mm. 
  long; 
  hind 
  femora 
  

   tending 
  to 
  be 
  sinuate; 
  size 
  17 
  to 
  20 
  mm. 
  (Amur 
  River, 
  Eastern 
  Siberia, 
  and 
  

   Japan) 
  C. 
  variabilis 
  Motschulsky 
  

  

  