﻿508 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol.98 
  

  

  apically 
  than 
  those 
  in 
  inermis. 
  T. 
  inermis 
  has 
  a 
  much 
  broader 
  meto- 
  

   pidium 
  than 
  either 
  pacijicus 
  or 
  wickhami 
  and 
  is 
  never 
  black 
  on 
  the 
  

   abdominal 
  venter, 
  whereas 
  the 
  two 
  latter 
  forms 
  usually 
  exhibit 
  a 
  

   tendency 
  to 
  be 
  black 
  beneath. 
  The 
  styles 
  in 
  inermis 
  are 
  not 
  greatly 
  

   enlarged 
  apically 
  and 
  are 
  minutely 
  serrate. 
  In 
  pacijicus 
  and 
  wickhami 
  

   the 
  styles 
  are 
  not 
  minutely 
  serrate 
  and 
  are 
  greatly 
  produced 
  at 
  the 
  

   inner 
  angles 
  in 
  wickhani; 
  and 
  in 
  pacijicus 
  they 
  are 
  greatly 
  enlarged 
  

   apically 
  and 
  almost 
  equally 
  produced 
  at 
  the 
  outer 
  and 
  inner 
  angles. 
  

  

  T. 
  wickhami 
  is 
  more 
  northern 
  in 
  distribution 
  than 
  pacijicus 
  and 
  its 
  

   occurrence 
  in 
  California 
  is 
  probably 
  determined 
  by 
  the 
  higher 
  eleva- 
  

   tions. 
  T. 
  pacijicus 
  is 
  the 
  commonest 
  species 
  in 
  California, 
  apparently 
  

   replacing 
  inermis 
  in 
  this 
  State, 
  which 
  might 
  suggest 
  a 
  subspecific 
  

   relationship 
  ; 
  it 
  extends 
  northward 
  into 
  southern 
  Oregon 
  and 
  eastward 
  

   through 
  Nevada 
  into 
  Utah. 
  

  

  T. 
  albidosparsus 
  is 
  separated 
  from 
  the 
  other 
  forms 
  by 
  having 
  the 
  

   suprahumerals 
  developed 
  into 
  horns. 
  The 
  outer 
  apical 
  angles 
  of 
  the 
  

   styles 
  are 
  acute 
  and 
  usually 
  strongly 
  produced. 
  A 
  form 
  possessing 
  

   very 
  long 
  horns 
  and 
  having 
  the 
  outer 
  and 
  inner 
  apical 
  angles 
  of 
  the 
  

   styles 
  strongly 
  produced 
  is 
  described 
  as 
  a 
  new 
  variety. 
  

  

  TORTISTILUS 
  MINUTUS, 
  new 
  species 
  

  

  Plate 
  22 
  

  

  Superficially 
  resembling 
  wickhami 
  (Van 
  Duzee) 
  but 
  much 
  smaller, 
  

   with 
  a 
  lower 
  pronotum 
  and 
  with 
  the 
  metopidium 
  more 
  rounded 
  

   posteriorly. 
  

  

  Length, 
  male 
  6.2 
  mm., 
  female 
  6.6 
  mm. 
  General 
  color 
  of 
  dried 
  

   specimens 
  dark 
  yellow 
  mottled 
  with 
  irregular 
  orange 
  spots; 
  coxae 
  in 
  

   the 
  males 
  blackened 
  on 
  outer 
  side. 
  

  

  Pronotum 
  low. 
  Metopidium 
  perpendicular 
  on 
  basal 
  half, 
  apical 
  

   portion 
  rounding 
  posteriorly; 
  the 
  sides 
  little 
  widened 
  before 
  the 
  supra- 
  

   humerals, 
  meeting 
  at 
  a 
  point 
  one-third 
  the 
  length 
  of 
  pronotum 
  from 
  

   anterior 
  extremity. 
  Posterior 
  process 
  very 
  strongly 
  declivent. 
  

  

  Male 
  with 
  teeth 
  of 
  lateral 
  valves 
  less 
  than 
  twice 
  as 
  long 
  as 
  broad, 
  

   broadly 
  rounded 
  apically. 
  Sternal 
  plate 
  laterally 
  compressed 
  in 
  api- 
  

   cal 
  half 
  to 
  one-half 
  of 
  the 
  basal 
  width; 
  apical 
  fifth 
  split, 
  a 
  small 
  notch 
  

   present 
  at 
  extreme 
  apex. 
  Styles 
  long 
  S-shaped; 
  apices 
  flattened, 
  

   obliquely 
  truncate, 
  slightly 
  serrate, 
  outer 
  and 
  inner 
  apical 
  angles 
  about 
  

   equally 
  produced 
  with 
  inner 
  angle 
  toothlike. 
  Anterior 
  arm 
  of 
  aede- 
  

   agus 
  greatly 
  narrowed 
  in 
  apical 
  third 
  in 
  either 
  lateral 
  or 
  posterior 
  

   aspect; 
  functional 
  orifice 
  very 
  broadly 
  ovate. 
  

  

  Last 
  ventral 
  segment 
  of 
  female 
  with 
  posterior 
  margin 
  broadly 
  

   emarginate, 
  small 
  V-shaped 
  notch 
  present 
  in 
  middle. 
  

  

  Male 
  holotype 
  (U.S.N.M. 
  No. 
  57644), 
  female 
  allotype, 
  one 
  male 
  

   paratype, 
  and 
  five 
  female 
  paratypes 
  from 
  "Montana," 
  Uhler 
  collec- 
  

   tion; 
  one 
  male 
  paratype 
  "Dae." 
  (Dakota), 
  Uhler 
  collection. 
  

  

  