﻿Mr. 
  G. 
  J. 
  Arrow 
  on 
  Lamellicorn 
  Beetles. 
  391 
  

  

  I 
  have 
  included 
  0. 
  biarmatus, 
  Lee, 
  among 
  the 
  Central- 
  

   American 
  species 
  on 
  the 
  strength 
  of 
  a 
  single 
  specimen 
  from 
  

   Durango 
  left 
  unnamed 
  by 
  Bates. 
  It 
  is 
  apparently 
  a 
  female, 
  

   and 
  I 
  am 
  unable 
  to 
  distinguish 
  it 
  from 
  that 
  sex 
  of 
  the 
  North- 
  

   American 
  species. 
  

  

  The 
  two 
  Mexican 
  specimens 
  referred 
  by 
  Bates 
  to 
  0. 
  luridus, 
  

   Westw., 
  agree 
  exactly 
  with 
  the 
  type, 
  and 
  are 
  not, 
  as 
  he 
  

   suggested, 
  the 
  other 
  sex. 
  He 
  evidently 
  did 
  not 
  recognize 
  

   the 
  two 
  tubercles 
  described 
  by 
  Westwood 
  in 
  the 
  interrupted 
  

   carina 
  upon 
  the 
  vertex 
  of 
  the 
  head. 
  On 
  the 
  other 
  hand, 
  the 
  

   Guatemalan 
  specimen 
  also 
  placed 
  here 
  by 
  Bates 
  belongs 
  to 
  

   quite 
  a 
  different 
  species, 
  which, 
  for 
  the 
  sake 
  of 
  clearness, 
  I 
  

   describe. 
  

  

  Ochodceus 
  puncticollis, 
  sp. 
  n. 
  

  

  llufo-brunneus, 
  ovatus, 
  sat 
  nitidus, 
  parce 
  fulvo-setosus, 
  capite 
  

   grosse 
  granulato, 
  vertice 
  fortiter 
  transverse 
  carinato, 
  clypeo 
  parvo, 
  

   late 
  arcuato, 
  margine 
  medio 
  subtubercuJato, 
  mento 
  parvo, 
  lam, 
  

   subquadrato 
  ; 
  prothorace 
  sat 
  fortiter, 
  medio 
  disperse, 
  lateraliter 
  

   crebre, 
  punctato, 
  marginibus 
  lateralibus 
  fere 
  rectis, 
  angulis 
  

   posticis 
  paulo 
  rotundatis 
  ; 
  elytris 
  brevissime 
  setosis, 
  fortiter 
  

   striatis, 
  striis 
  grosse 
  punctatis, 
  angulis 
  posticis 
  productis 
  ; 
  tibiis 
  

   anticis 
  fortiter 
  3-dentatis, 
  dente 
  supero 
  ab 
  secundo 
  parum 
  remoto, 
  

   tarsorum 
  posticorum 
  artieulo 
  primo 
  quam 
  reliquis 
  conjunctis 
  

   multo 
  breviori. 
  

  

  Long. 
  7'5 
  mm. 
  ; 
  lat. 
  max. 
  4*25 
  mm. 
  

  

  Bab. 
  Guatemala: 
  Tepan 
  (Gonradt). 
  

  

  The 
  single 
  specimen 
  is 
  probably 
  a 
  female. 
  The 
  shining, 
  

   sparsely 
  punctured 
  prothorax 
  distinguishes 
  it 
  from 
  most 
  other 
  

   species 
  of 
  the 
  genus. 
  The 
  posterior 
  angles 
  of 
  the 
  elytra 
  are 
  

   distinctly 
  dentate, 
  the 
  mentum 
  is 
  small, 
  rather 
  square, 
  smooth, 
  

   and 
  very 
  feebly 
  impressed 
  along 
  the 
  middle, 
  the 
  vertex 
  bears 
  

   a 
  short 
  but 
  sharply 
  elevated 
  transverse 
  carina, 
  and 
  the 
  small 
  

   clypeus 
  b(ais 
  a 
  rudimentary 
  tubercle 
  (which 
  is, 
  perhaps, 
  more 
  

   developed 
  in 
  the 
  male) 
  at 
  the 
  middle 
  of 
  the 
  front 
  margin. 
  

  

  Ochodceus 
  planiceps, 
  sp. 
  n. 
  

  

  Ficeo-rufus, 
  capite 
  prothoraceque 
  paulo 
  dilutioribus, 
  ubique 
  sat 
  

   dense 
  fulvo-setosus, 
  ovatus, 
  capite 
  granuloso-rugoso, 
  piano, 
  clypeo 
  

   late 
  arcuato, 
  mento 
  elevato, 
  postice 
  polito, 
  antice 
  sulcato, 
  hirto 
  ; 
  

   pronoto 
  dense 
  et 
  aequaliter 
  granuloso-rugoso 
  ; 
  elytris 
  fortiter 
  

   striato-punctatis, 
  angulis 
  posticis 
  haud 
  productis 
  ; 
  pedibus 
  simpli- 
  

   cibus, 
  baud 
  brevibus, 
  tibiis 
  anticis 
  3-dentatis, 
  dente 
  supero 
  minuto, 
  

   a 
  basi 
  baud 
  remoto 
  : 
  

  

  S 
  , 
  tibise 
  anticse 
  apice 
  intus 
  acute 
  producto. 
  

  

  Lone;. 
  7'5 
  mm. 
  ; 
  lat. 
  max. 
  4 
  mm. 
  

  

  