﻿of 
  the 
  Genus 
  Golofa. 
  139 
  

  

  transverso, 
  antice 
  modice 
  contract©, 
  postice 
  parum 
  sinuato, 
  

   angulis 
  posticis 
  distinctis, 
  coruu 
  sat 
  angusto, 
  antrorsum 
  oblique 
  

   producto, 
  subtus 
  arcuato, 
  excavato, 
  dense 
  flavo-hirto, 
  apice 
  

   acuminato, 
  baud 
  clavato, 
  pronoto 
  ubique 
  distincte 
  punctato 
  ; 
  

   scutello 
  lato, 
  linea 
  profunda 
  angulata 
  punctisque 
  irregularibus 
  

   impresso 
  ; 
  elytris 
  opacis, 
  subtiliter 
  punctatis, 
  stria 
  profunda 
  

   suturali 
  aliisque 
  obsoletis 
  geminatis 
  ; 
  pygidio 
  fere 
  omnino 
  

   rugoso, 
  subtus 
  medio 
  grosse 
  punctato 
  ; 
  pedibus 
  antieis 
  modice 
  

   elongatis, 
  tibiis 
  tridentatis 
  ; 
  mandibulis 
  apice 
  integris, 
  truncatis, 
  

   extus 
  subtiliter 
  sinuatia. 
  

   Long. 
  35-49 
  mm. 
  ; 
  lat. 
  max. 
  19-25 
  mm. 
  

  

  Hob. 
  Colombia 
  : 
  Cauca 
  Valley. 
  

  

  Numerous 
  male 
  specimens 
  were 
  found 
  by 
  Mr. 
  W. 
  E. 
  Pratt. 
  

   The 
  British 
  Museum 
  is 
  indebted 
  to 
  Colonel 
  F. 
  Winn 
  Sampson 
  

   for 
  this 
  addition 
  to 
  the 
  collection. 
  

  

  Although 
  varying 
  considerably 
  in 
  colour 
  from 
  a 
  deep 
  

   brick-red 
  to 
  nearly 
  black 
  it 
  is 
  always 
  of 
  a 
  sombre 
  shade, 
  

   which 
  distinguishes 
  it 
  from 
  all 
  the 
  other 
  species 
  of 
  Golofa, 
  

   with 
  the 
  exception 
  of 
  the 
  quite 
  dissimilar 
  G. 
  imbellis, 
  Thorns. 
  

   The 
  armature 
  of 
  the 
  male 
  is 
  also 
  quite 
  distinctive, 
  the 
  

   thoracic 
  horn 
  being 
  more 
  directed 
  forward 
  than 
  usual, 
  and 
  

   in 
  the 
  series 
  of 
  45 
  specimens 
  I 
  have 
  examined 
  showing 
  much 
  

   less 
  than 
  the 
  normal 
  degree 
  of 
  variation 
  in 
  its 
  length, 
  which 
  

   in 
  the 
  best-developed 
  specimens 
  is 
  about 
  equal 
  to 
  that 
  of 
  the 
  

   pronotum 
  in 
  the 
  middle. 
  It 
  is 
  neither 
  dilated 
  at 
  the 
  end, 
  

   as 
  in 
  G. 
  claviger, 
  L., 
  and 
  allied 
  species, 
  nor 
  very 
  slender, 
  as 
  

   in 
  G. 
  eegeon, 
  eacus, 
  &c, 
  and 
  the 
  species 
  may 
  probably 
  be 
  

   regarded 
  as 
  representing 
  a 
  primitive 
  type 
  showing 
  the 
  nearest 
  

   approximation 
  to 
  Spodistes 
  and 
  other 
  allied 
  genera. 
  The 
  

   pronotum 
  is 
  distinctly 
  and 
  fairly 
  evenly 
  punctured, 
  and 
  

   the 
  elytra 
  moderately 
  strongly, 
  especially 
  near 
  the 
  suture. 
  A 
  

   small 
  but 
  distinctive 
  feature 
  is 
  the 
  deep 
  angular 
  groove, 
  not 
  

   composed 
  of 
  punctures, 
  always 
  found 
  upon 
  the 
  scutellum. 
  

   This 
  occurs 
  also 
  in 
  G. 
  claviger, 
  but 
  is 
  absent 
  in 
  G. 
  humboldti 
  

   and 
  inconstant 
  in 
  other 
  species. 
  The 
  hairy 
  clothing 
  of 
  the 
  

   base 
  of 
  the 
  pygidium 
  and 
  the 
  lower 
  surface 
  of 
  the 
  body 
  is 
  

   short 
  and 
  inconspicuous, 
  and 
  the 
  stridulatory 
  ridges 
  of 
  the 
  

   propygidium 
  are 
  fine 
  and 
  regular 
  towards 
  the 
  margin 
  of 
  the 
  

   segment 
  and 
  much 
  better 
  developed 
  than 
  in 
  G. 
  eacus. 
  

  

  Golofa 
  argentina, 
  sp. 
  n. 
  

  

  c? 
  . 
  Castaneo-rufa, 
  capite, 
  pronoti 
  medio, 
  sutura, 
  tibiis 
  tarsisque 
  

   plus 
  minusve 
  infuscatis 
  ; 
  capite 
  cornu 
  gracili, 
  recurvato, 
  apice 
  

   acuto, 
  armato, 
  clypeo 
  angustato, 
  apice 
  bilobato, 
  vertice 
  grosse 
  

   punctato 
  ; 
  prothorace 
  brevi, 
  sat 
  lato, 
  polito, 
  minute 
  sat 
  sparse 
  

   punctato, 
  antice 
  medio 
  circulariter 
  excavato 
  et 
  dense 
  fulvo4iiito, 
  

  

  