﻿REPORT 
  OF 
  THE 
  STATE 
  ENTOMOLOGIST 
  I908 
  79 
  

  

  I 
  wish 
  to 
  acknowledge 
  my 
  indebtedness 
  to 
  Prof. 
  J. 
  H. 
  Comstock 
  

   for 
  the 
  material 
  he 
  so 
  kindly 
  furnished, 
  to 
  Dr 
  E. 
  P. 
  Felt 
  for 
  help- 
  

   ful 
  criticism, 
  and 
  my 
  especial 
  obligation 
  to 
  Prof. 
  A. 
  D. 
  IMcGilli- 
  

   ^ray 
  for 
  his 
  frequent 
  assistance 
  and 
  advice. 
  

  

  Entomological 
  Laboratory, 
  

  

  Cornell 
  Universit}^, 
  July 
  i, 
  1907 
  

  

  KEYS 
  FOR 
  DETERMINING 
  THE 
  GENERA 
  OF 
  THE 
  IPIDAE 
  (SCGL-iTINAE) 
  AND 
  

   PLATYPODIDAE 
  (PLATYPODINAE) 
  OF 
  AMERICA 
  NORTH 
  OF 
  MEXICO 
  

  

  The 
  arrangement 
  of 
  family 
  and 
  subfamily 
  names 
  in 
  the 
  follow- 
  

   ing 
  keys 
  seems 
  the 
  most 
  natural 
  at 
  present. 
  PubUshed 
  keys 
  have 
  

   been 
  freely 
  used. 
  

  

  Cactopinus 
  Schwz. 
  (which 
  has 
  been 
  omitted 
  from 
  the 
  generic 
  

   key) 
  is 
  distinguished 
  from 
  all 
  other 
  described 
  North 
  American 
  

   vScolytidae 
  by 
  the 
  sculpture 
  of 
  the 
  pronotum 
  : 
  " 
  Disk 
  in 
  both 
  sexes, 
  

   with 
  a 
  longitudinal, 
  tuberculated, 
  and 
  distinctly 
  elevated, 
  median 
  

   area 
  which 
  projects 
  beyond 
  the 
  base 
  of 
  the 
  thorax 
  as 
  a 
  triangular 
  

   lobe," 
  forming 
  a 
  '' 
  hoodlike 
  projection 
  over 
  the 
  scutellum." 
  

   [E. 
  A. 
  Schwarz. 
  Psyche, 
  v. 
  8, 
  sup. 
  i, 
  p. 
  ii] 
  

  

  Families 
  

  

  a 
  Head 
  narrower 
  than 
  the 
  prothorax 
  ; 
  ist 
  tarsal 
  segment 
  shorter 
  than 
  the 
  

   others 
  miited 
  ; 
  eyes 
  oblong 
  or 
  divided 
  [see 
  pi. 
  4, 
  fig. 
  6; 
  pi. 
  5, 
  fig. 
  10, 
  11; 
  

  

  pi. 
  8, 
  fig. 
  21 
  ; 
  pi. 
  9, 
  fig. 
  25 
  ; 
  pi. 
  II, 
  fig. 
  36, 
  37] 
  Ipidaei 
  

  

  aa 
  Head 
  broader 
  than 
  the 
  prothorax; 
  ist 
  tarsal 
  segment 
  as 
  long 
  as 
  the 
  

  

  others 
  united 
  ; 
  eyes 
  round, 
  subconvex 
  [see 
  pi. 
  3, 
  fig. 
  i, 
  2] 
  

  

  Platypodidae 
  

   The 
  family 
  Platypodidae 
  is 
  represented 
  in 
  America, 
  north 
  of 
  Mexico, 
  

   by 
  one 
  genus. 
  Platypus 
  Herbst. 
  

  

  Subfamilies 
  of 
  the 
  Ipidae 
  

  

  a 
  Anterior 
  " 
  tibiae 
  produced 
  at 
  the 
  upper 
  apical 
  angle 
  beyond 
  the 
  tarsal 
  

   insertion 
  into 
  a 
  mucro 
  or 
  bifid 
  process." 
  (Blandford) 
  [see 
  pi. 
  3, 
  

  

  fig. 
  5] 
  

   b 
  Foretarsus 
  with 
  the 
  3d 
  segment 
  bilobed 
  ; 
  upper 
  or 
  outer 
  border 
  of 
  the 
  

  

  foretibiae 
  unarmed 
  or 
  with 
  few 
  very 
  small 
  teeth 
  

  

  Eccoptogasterinae 
  (Scolytini) 
  

   bb 
  Foretarsus 
  with 
  the 
  3d 
  segment 
  not 
  bilobed 
  ; 
  the 
  outer 
  border 
  of 
  the 
  

  

  foretibiae 
  strongly 
  dentate 
  [see 
  pi. 
  3, 
  fig. 
  3] 
  Erineophilinae 
  

  

  aa 
  Foretibiae 
  not 
  produced 
  at 
  the 
  upper 
  or 
  outer 
  apical 
  angle 
  beyond 
  the 
  

   tarsal 
  insertion 
  into 
  a 
  mucro 
  or 
  bifid 
  process 
  [see 
  pi. 
  4, 
  fig. 
  6; 
  pi. 
  5, 
  

   fig. 
  10, 
  11] 
  

  

  > 
  Ganglhauer. 
  Munchener 
  Koleopteroloyische 
  Zsitschrift. 
  1903, 
  ban! 
  i, 
  311. 
  

  

  