﻿82 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  g 
  Base 
  of 
  prothorax 
  bordered 
  by 
  a 
  fine, 
  raised 
  line; 
  elytral 
  

  

  declivity 
  of 
  the 
  two 
  sexes 
  alike 
  Pityophthorus 
  Eich. 
  

  

  gg 
  Base 
  of 
  prothorax 
  without 
  a 
  raised 
  border; 
  teeth 
  of 
  elytral 
  

  

  declivity 
  much 
  larger 
  in 
  the 
  male 
  than 
  in 
  the 
  female 
  

  

  Pityogenes 
  Bedel 
  

   cc 
  Antennal 
  club 
  not 
  annulated; 
  eyes 
  completely 
  divided; 
  elytral 
  de- 
  

   clivity 
  oblique, 
  not 
  excavated 
  and 
  not 
  toothed 
  [pi. 
  5, 
  fig. 
  12, 
  13I 
  

   Trypodendron 
  Steph. 
  (Xyloterus 
  Erich.) 
  

   bb 
  Antennal 
  club 
  not 
  pubescent 
  on 
  both 
  sides, 
  almost 
  entirely 
  corneous^ 
  

   and 
  usually 
  not 
  at 
  all 
  annulated 
  on 
  the 
  inner 
  face; 
  at 
  most, 
  the 
  

   outer 
  segments 
  of 
  the 
  club 
  show 
  from 
  the 
  inner 
  side 
  but 
  slightly 
  at 
  

   the 
  distal 
  extremity 
  

   c 
  Antennal 
  club 
  obliquely 
  truncate 
  at 
  the 
  distal 
  end 
  of 
  the 
  outer 
  sur- 
  

   face, 
  with 
  the 
  distal 
  segments 
  of 
  the 
  club 
  confined 
  to 
  the 
  truncate 
  

   surface 
  and 
  telescoped 
  so 
  that 
  the 
  flat, 
  pubescent, 
  truncate 
  surface 
  

   appears 
  concentrically 
  annulated 
  [pi. 
  6, 
  fig. 
  18, 
  ant. 
  ; 
  pi. 
  13, 
  fig. 
  42] 
  

   d 
  Antennal 
  funicle 
  with 
  4 
  segments; 
  elytral 
  pubescence 
  scalelike.... 
  

  

  Cryphalus 
  Erich. 
  

   dd 
  Antennal 
  funicle 
  with 
  5 
  segments 
  ; 
  elytral 
  pubescence 
  not 
  scalelike 
  

  

  e 
  Elytral 
  declivity 
  excavated 
  and 
  toothed 
  

  

  Ips 
  DeG., 
  in 
  part 
  (Tomicus 
  Latr. 
  1807) 
  

   ee 
  Elytral 
  declivity 
  not 
  excavated, 
  and 
  without 
  prominent 
  teeth 
  

   / 
  Caudal 
  margin 
  of 
  prosternum 
  extending 
  into 
  a 
  long 
  spinelike 
  

   process 
  which 
  projects 
  caudad 
  between 
  the 
  forecoxae. 
  Max- 
  

   illary 
  lobe 
  with 
  radiating 
  spines 
  on 
  the 
  outer 
  edge, 
  bark 
  

  

  borers 
  [pi. 
  6, 
  fig. 
  14, 
  18] 
  Dryocoetes 
  Eich. 
  

  

  ff 
  Caudal 
  margin 
  of 
  the 
  extremely 
  short 
  prosternum 
  at 
  most 
  but 
  

   slightly 
  produced 
  on 
  the 
  median 
  line; 
  maxillary 
  lobe 
  pilose^ 
  

   without 
  radiating 
  spines 
  on 
  the 
  outer 
  edge, 
  borers 
  in 
  wood 
  

   and 
  nuts 
  [pi. 
  6, 
  fig. 
  15, 
  17] 
  

   g 
  Tibiae 
  with 
  the 
  outer 
  edge 
  straight, 
  spinose 
  ; 
  dorsum 
  of 
  pro- 
  

   thorax 
  not 
  more 
  strongly 
  roughened 
  in 
  front 
  than 
  behind.. 
  

  

  Coccotrypes 
  Eich. 
  

  

  gg 
  Tibiae 
  with 
  the 
  outer 
  edge 
  curved, 
  finely 
  serrate; 
  dorsum 
  

  

  of 
  prothorax 
  much 
  more 
  strongly 
  roughened 
  in 
  front 
  than 
  

  

  behind 
  Xyleborus 
  Eich. 
  

  

  cc 
  Antennal 
  club 
  with 
  the 
  distal 
  segments 
  not 
  telescoped 
  to 
  form 
  a 
  flat, 
  

   truncate 
  surface, 
  distinct, 
  and 
  not 
  confined 
  to 
  the 
  distal 
  extremity 
  

   of 
  the 
  outer 
  surface 
  [pi. 
  6, 
  fig. 
  16] 
  

   d 
  Elytral 
  declivity 
  not 
  deeply 
  excavated, 
  at 
  most 
  only 
  slightly 
  con- 
  

   cave; 
  2d 
  segment 
  of 
  the 
  antennal 
  club 
  surrounding 
  the 
  ist, 
  which 
  

  

  is 
  nearly 
  oval 
  [pi. 
  12, 
  fig. 
  38] 
  Xylocleptes 
  Ferr. 
  

  

  dd 
  Elytral 
  declivity 
  deeply 
  excavated 
  and 
  toothed; 
  2d 
  segment 
  of 
  

   antennal 
  club 
  not 
  nearly 
  surrounding 
  the 
  ist, 
  the 
  ist 
  suture 
  be- 
  

   ing 
  straight 
  or 
  angular 
  [pi. 
  6, 
  fig. 
  16] 
  

  

  Ips 
  DeG., 
  in 
  part 
  (Tomicus 
  Latr. 
  1807) 
  

   aa 
  Antennal 
  funicle 
  with 
  6 
  segments 
  

  

  b 
  Antennal 
  club 
  distinctly 
  annulated 
  on 
  both 
  sides 
  ; 
  elytra 
  aculeate 
  at 
  

   the 
  tip 
  Micracis 
  Lee. 
  

  

  