﻿MAR. 
  4, 
  1922 
  LOOMIS 
  : 
  NEW 
  SPECIES 
  COLEOPTEROUS 
  GE;nUS 
  TROX 
  133 
  

  

  tcllaris 
  Say 
  (type 
  locality, 
  "Upper 
  Platte"), 
  and 
  a 
  specimen 
  of 
  this 
  

   typical 
  form 
  is 
  before 
  the 
  writer 
  from 
  southwestern 
  Texas 
  (between 
  

   Pecos 
  River 
  and 
  the 
  Guadeloupe 
  Mountains). 
  

  

  Trox 
  platycyphus 
  Loomis, 
  sp. 
  nov. 
  Shape 
  oblong-oval, 
  the 
  color 
  black 
  

   and 
  shining 
  when 
  clean. 
  Length 
  14 
  to 
  19 
  mm. 
  Habitat, 
  southern 
  Texas. 
  

  

  Thorax 
  strongly 
  constricted 
  at 
  basal 
  third; 
  posterior 
  angles 
  obtusely 
  

   rounded, 
  a 
  slight 
  emargination 
  immediately 
  in 
  front 
  of 
  them; 
  tubercles 
  

   strongly 
  shining, 
  much 
  more 
  sparsely 
  and 
  coarsely 
  punctured 
  than 
  the 
  rest 
  

   of 
  the 
  surface 
  ; 
  tubercles 
  of 
  the 
  posterior 
  series 
  oval, 
  the 
  median 
  pair 
  larger 
  ; 
  

   in 
  front 
  of 
  each 
  outer 
  one 
  and 
  belonging 
  to 
  the 
  anterior 
  series 
  is 
  a 
  smaller 
  tu- 
  

   bercle; 
  the 
  usual 
  ridges 
  of 
  the 
  median 
  pair 
  of 
  tubercles 
  of 
  the 
  anterior 
  series 
  

   coalesce 
  causing 
  the 
  tubercles 
  to 
  appear 
  broad 
  and 
  flat; 
  from 
  each 
  of 
  these, 
  

   on 
  the 
  inner 
  side, 
  a 
  narrow, 
  usually 
  unpolished 
  ridge 
  extends 
  backward 
  between 
  

   and 
  nearly 
  opposite 
  the 
  middle 
  of 
  the 
  inner 
  pair 
  of 
  tubercles 
  of 
  the 
  posterior 
  

   series. 
  Elytra 
  with 
  the 
  tubercles 
  transversely 
  confluent, 
  much 
  flattened, 
  

   smooth 
  and 
  shining; 
  rows 
  of 
  large 
  and 
  small 
  tubercles 
  alternating, 
  four 
  

   rows 
  of 
  the 
  large, 
  six 
  of 
  the 
  smaller, 
  two 
  of 
  these 
  smaller 
  rows 
  between 
  the 
  

   suture 
  and 
  the 
  first 
  large 
  row; 
  series 
  of 
  punctures 
  much 
  confused 
  by 
  trans- 
  

   verse 
  coalescence 
  of 
  tubercles; 
  entire 
  surface 
  of 
  the 
  elytra 
  glabrous. 
  

  

  The 
  male 
  genitalia 
  large 
  and 
  with 
  very 
  pronounced 
  constriction 
  near 
  

   the 
  apical 
  third 
  ; 
  median 
  lobe 
  not 
  attaining 
  apex 
  of 
  the 
  lateral 
  lobes 
  ; 
  outer 
  

   sides 
  of 
  lateral 
  lobes 
  almost 
  parallel 
  with 
  a 
  very 
  abrupt 
  constriction 
  on 
  the 
  

   apical 
  third 
  which 
  reduces 
  the 
  width 
  of 
  the 
  lobe 
  nearly 
  one 
  half, 
  the 
  lobe 
  then 
  

   continuing 
  to 
  a 
  rather 
  broadly 
  rounded 
  extremity; 
  dorsal 
  surface 
  of 
  lateral 
  

   lobes 
  at 
  the 
  constriction 
  abruptly 
  declining 
  giving 
  the 
  narrowed 
  apex 
  a 
  lower 
  

   level; 
  basal 
  pieces 
  long 
  and 
  rather 
  broad. 
  Fig. 
  1, 
  A. 
  

  

  Type 
  and 
  paratypes 
  No. 
  25198, 
  U. 
  S. 
  National 
  Museum. 
  

  

  Described 
  from 
  nineteen 
  specimens 
  from 
  Cotulla, 
  Texas, 
  collected 
  April 
  

   17, 
  1906, 
  by 
  F. 
  C. 
  Pratt. 
  Other 
  paratype 
  localities 
  in 
  Texas 
  are 
  Knippa 
  and 
  

   Sabinal, 
  one 
  specimen 
  from 
  each 
  (F. 
  C. 
  Pratt), 
  and 
  San 
  Diego, 
  two 
  specimens 
  

   (E. 
  A. 
  Schwarz). 
  

  

  The 
  pair 
  of 
  complanate 
  median 
  tubercles 
  of 
  the 
  thorax, 
  the 
  confluent 
  

   elytral 
  elevations 
  and 
  the 
  form 
  of 
  the 
  genitalia 
  are 
  the 
  salient 
  features 
  of 
  this 
  

   species 
  and 
  separate 
  it 
  from 
  scutellaris 
  and 
  the 
  species 
  which 
  follow 
  it. 
  

  

  Trox 
  oligonus 
  lyoomis, 
  sp. 
  nov. 
  Large 
  and 
  broadly 
  oval, 
  robust 
  species; 
  

   shining 
  black 
  when 
  clean. 
  Length 
  16 
  to 
  18 
  mm. 
  Habitat, 
  Texas. 
  

  

  Constriction 
  of 
  thorax 
  moderate 
  and 
  resembling 
  scutellaris 
  although 
  not 
  as 
  

   long; 
  margin 
  in 
  front 
  of 
  hind 
  angles 
  faintly 
  emarginate; 
  tuberculation 
  as 
  in 
  

   scutellaris. 
  Elytra 
  with 
  rounded 
  and 
  moderately 
  distinct 
  tubercles 
  in 
  ten 
  

   rows, 
  none 
  of 
  which 
  predominates; 
  usually 
  a 
  few 
  spicules 
  in 
  a 
  small 
  patch 
  

   behind 
  each 
  tubercle; 
  intervals 
  between 
  the 
  rows 
  of 
  tubercles 
  with 
  a 
  series 
  

   of 
  punctures 
  which 
  are 
  finer 
  than 
  in 
  scutellaris. 
  Vestigial 
  wings 
  short, 
  rather 
  

   broad. 
  

  

  Male 
  genitalia 
  comparatively 
  small 
  ; 
  sides 
  of 
  lateral 
  lobes 
  not 
  constricted 
  

   at 
  apical 
  third 
  as 
  in 
  scutellaris 
  and 
  the 
  preceding 
  species; 
  tip 
  of 
  median 
  

   lobe 
  more 
  acute, 
  reaching 
  nearly 
  to 
  tips 
  of 
  the 
  lateral 
  lobes; 
  basal 
  pieces 
  

   broad 
  and 
  long. 
  Fig. 
  1, 
  C. 
  

  

  Type 
  and 
  paratypes 
  No. 
  25199, 
  U. 
  S. 
  National 
  Museum. 
  

  

  Described 
  from 
  a 
  series 
  of 
  nine 
  specimens 
  from 
  Texas; 
  five 
  from 
  the 
  type 
  

   locality, 
  San 
  Diego, 
  collected 
  by 
  E. 
  A. 
  Schwarz, 
  April 
  30 
  to 
  June 
  12, 
  1895, 
  and 
  

  

  