﻿NO. 
  1966. 
  SYNOPSIS 
  OF 
  NEOTROPICAL 
  LIMNOBIN^— 
  ALEXANDER. 
  485 
  

  

  3. 
  Thoracic 
  sclentes: 
  

   Crampton, 
  G. 
  C. 
  

  

  A 
  Contribution 
  to 
  the 
  Comparative 
  Morphology 
  of 
  the 
  Thoracic 
  Sclerites 
  of 
  Insects. 
  

  

  Proc. 
  Acad. 
  Nat. 
  Sci. 
  Philadelphia, 
  Jan., 
  1909 
  (Feb. 
  22, 
  1909), 
  pp. 
  3-54, 
  pis. 
  1-4. 
  

  

  Snodgrass, 
  R. 
  E. 
  

  

  The 
  Thorax 
  of 
  Insects 
  and 
  the 
  Articulation 
  of 
  the 
  Wings. 
  

  

  Proc. 
  U. 
  S. 
  Nat. 
  Mus., 
  vol. 
  36, 
  pp. 
  511-595, 
  pis. 
  40-69 
  (Nos. 
  1687, 
  1909). 
  

  

  4. 
  Abdominal 
  scleriUs: 
  

  

  CoMSTocK, 
  J. 
  H., 
  and 
  Kellogg, 
  V. 
  L. 
  

   The 
  Elements 
  of 
  Insect 
  Anatomy. 
  

   Ithaca, 
  N. 
  Y., 
  1904. 
  

  

  5. 
  Hypopygial 
  characters: 
  

   Snodgrass, 
  R. 
  E. 
  

  

  The 
  HjT)opygium 
  of 
  the 
  Tipulidae. 
  

  

  Trans. 
  Amer. 
  Ent. 
  Soc, 
  vol. 
  30, 
  pp. 
  179-236, 
  pis. 
  8-18. 
  

  

  The 
  above 
  are, 
  without 
  much 
  question, 
  the 
  best 
  and 
  are 
  recom- 
  

   mended 
  to 
  students 
  of 
  the 
  family 
  as 
  standards 
  to 
  be 
  followed 
  ui 
  tlie 
  

   describing 
  of 
  species. 
  

  

  Wlierever 
  I 
  have 
  asked 
  for 
  specimens, 
  available 
  material 
  was 
  very 
  

   cheerfully 
  given 
  me 
  for 
  study. 
  I 
  wish 
  to 
  express 
  my 
  sincere 
  grati- 
  

   tude 
  to 
  several 
  gentlemen 
  for 
  their 
  kindness 
  m 
  regard 
  to 
  this 
  matter. 
  

   These 
  are 
  Mr. 
  Frederick 
  Knab, 
  of 
  the 
  United 
  States 
  National 
  Museum; 
  

   Mr. 
  J. 
  A. 
  Grossbeck, 
  especially 
  for 
  the 
  loan 
  of 
  the 
  Lutz-Crampton 
  

   Guiana 
  collection; 
  Mr. 
  S. 
  H. 
  Henshaw 
  of 
  the 
  Museum 
  of 
  Comparative 
  

   Zoology; 
  Prof. 
  C. 
  F. 
  Baker, 
  Mr. 
  C. 
  W. 
  Johnson, 
  Mr. 
  E. 
  T. 
  Cresson, 
  jr., 
  

   and 
  others. 
  Much 
  of 
  the 
  work 
  was 
  done 
  as 
  research 
  in 
  the 
  Systematic 
  

   Entomological 
  Laboratory 
  of 
  Cornell, 
  under 
  the 
  direction 
  of 
  Dr. 
  J. 
  

   Chester 
  Bradley, 
  and 
  to 
  Doctor 
  Bradley 
  and 
  Doctor 
  Needham, 
  my 
  

   smcere 
  thanks 
  are 
  due 
  for 
  continual 
  help. 
  

  

  The 
  following 
  collections 
  are 
  embraced 
  in 
  the 
  material 
  studied: 
  

  

  1. 
  United 
  States 
  National 
  Museum, 
  Washington, 
  District 
  of 
  

   Columbia. 
  A 
  very 
  extensive 
  series 
  of 
  nearly 
  400 
  specimens 
  rep- 
  

   resenting 
  about 
  90 
  species: 
  received 
  through 
  Mr. 
  Knab. 
  

  

  2. 
  American 
  Museum 
  of 
  Natural 
  History, 
  New 
  York 
  City. 
  A 
  

   collection 
  embracing 
  about 
  50 
  specimens 
  in 
  37 
  species; 
  received 
  

   through 
  Mr. 
  Grossbeck. 
  

  

  3. 
  Museum 
  of 
  Comparative 
  Zoology, 
  Cambridge, 
  Massachusetts. 
  

   A 
  collection 
  of 
  six 
  specimens, 
  four 
  species, 
  but 
  of 
  especial 
  interest 
  as 
  

   belonging 
  to 
  the 
  Osten 
  Sacken 
  and 
  Loew 
  collections 
  ; 
  received 
  through 
  

   Mr. 
  S. 
  H. 
  Henshaw. 
  

  

  4. 
  Boston 
  Society 
  of 
  Natural 
  History, 
  Boston, 
  Massachusetts. 
  

   A 
  specimen 
  of 
  Tanypremna; 
  received 
  through 
  Mr, 
  C. 
  W. 
  Johnson. 
  

  

  5. 
  Academy 
  of 
  Natural 
  Sciences, 
  Philadelphia, 
  Pennsylvania. 
  A 
  

   collection 
  of 
  about 
  25 
  specimens, 
  5 
  or 
  6 
  species; 
  received 
  through 
  Mr. 
  

   Cresson. 
  

  

  