﻿REVISION 
  OF 
  TRIBE 
  CERESINI 
  — 
  CALDWELL 
  509 
  

  

  TORTISTILUS 
  ALBIDOSPARSUS 
  BUBALIFORMIS, 
  new 
  variety 
  

  

  Plate 
  22 
  

  

  Length, 
  male 
  8 
  mm., 
  female 
  8.8 
  mm.; 
  width 
  across 
  horns 
  approxi- 
  

   mating 
  4.7 
  mm. 
  in 
  either 
  sex. 
  Yellowish 
  mottled 
  with 
  white. 
  Horns 
  

   tipped 
  with 
  black, 
  with 
  mahogany-colored 
  stripes 
  beneath 
  not 
  quite 
  

   reaching 
  humerals; 
  short 
  reddish 
  stripe 
  present 
  on 
  dorsoposterior 
  

   margin; 
  a 
  white 
  stripe 
  separating 
  the 
  two 
  dark 
  red 
  stripes 
  on 
  each 
  

   horn 
  continued 
  onto 
  the 
  sides 
  of 
  the 
  pronotum 
  but 
  fading 
  before 
  the 
  

   ventral 
  margins 
  of 
  the 
  pronotum. 
  

  

  Metopidium 
  broad, 
  slightly 
  convex 
  below 
  horns, 
  forming 
  a 
  broad 
  

   flattened 
  triangle 
  between 
  and 
  posterior 
  to 
  horns. 
  Horns 
  recurved, 
  

   acute. 
  

  

  Styles 
  in 
  male 
  tending 
  to 
  be 
  truncate 
  with 
  outer 
  and 
  inner 
  apical 
  

   angles 
  equally 
  produced 
  into 
  acute 
  points. 
  

  

  Last 
  ventral 
  segment 
  in 
  female 
  deeply 
  notched 
  in 
  center 
  of 
  posterior 
  

   margin; 
  sides 
  of 
  notch 
  sinuate. 
  

  

  Resembling 
  Stictocephala 
  bubalus 
  (Fabricius) 
  in 
  general 
  appearance 
  

   but 
  differentiated 
  by 
  the 
  flattened 
  apically 
  truncate 
  styles. 
  Related 
  

   to 
  T. 
  a. 
  albidosparsus 
  (StS,l) 
  but 
  with 
  longer 
  horns 
  and 
  with 
  the 
  apical 
  

   angles 
  of 
  the 
  styles 
  equally 
  produced. 
  

  

  Male 
  holotype 
  (U.S.N.M. 
  No. 
  57645), 
  male 
  paratype, 
  and 
  female 
  

   allotype 
  from 
  Beaumont, 
  Calif., 
  June 
  23, 
  1941 
  (Christenson), 
  on 
  

   alfalfa; 
  two 
  male 
  and 
  two 
  female 
  paratypes 
  from 
  Oak 
  Glen, 
  Calif., 
  

   August 
  29, 
  1939 
  (Christenson), 
  on 
  alfalfa; 
  a 
  male 
  and 
  female 
  paratype 
  

   from 
  "Pasadena, 
  Calif., 
  8-28"; 
  and 
  one 
  male 
  paratype 
  from 
  San 
  

   Gabriel, 
  Calif. 
  (Hutchinson). 
  

  

  The 
  forms 
  occurring 
  on 
  cypress 
  are 
  a 
  compact 
  group 
  comprising 
  at 
  

   least 
  two 
  distinct 
  species 
  and 
  possibly 
  several 
  subspecies. 
  The 
  series 
  

   of 
  specimens 
  are 
  too 
  short 
  and 
  the 
  locality 
  records 
  are 
  too 
  limited 
  to 
  

   permit 
  one 
  to 
  arrive 
  at 
  a 
  definite 
  conclusion 
  as 
  to 
  whether 
  these 
  forms 
  

   are 
  subspecies 
  replacing 
  the 
  typical 
  forms 
  in 
  certain 
  localities 
  or 
  

   whether 
  they 
  represent 
  varieties. 
  Since 
  these 
  forms 
  are 
  morpho- 
  

   logically 
  distinct 
  but 
  somewhat 
  similar 
  to 
  the 
  typical 
  species 
  they 
  are 
  

   herein 
  considered 
  to 
  be 
  varieties. 
  

  

  TORTISTILUS 
  TRILINEATUS 
  CALIPERUS. 
  new 
  variety 
  

  

  Plate 
  22 
  

  

  Superficially 
  resembling 
  T. 
  t. 
  trilineatus 
  (Funkhouser) 
  but 
  with 
  a 
  

   ratio 
  of 
  total 
  length 
  to 
  length 
  of 
  pronotum 
  as 
  7.1 
  is 
  to 
  4.3; 
  in 
  t. 
  trilin- 
  

   eatus 
  this 
  proportion 
  is 
  7.1 
  to 
  5.9. 
  

  

  Posterior 
  process 
  short, 
  rather 
  obtuse, 
  very 
  slightly 
  declivent, 
  

   equilaterally 
  triangular 
  in 
  cross 
  section. 
  Styles 
  of 
  male 
  angular, 
  

   acute 
  apically, 
  strongly 
  convergent, 
  caliperlike. 
  Last 
  ventral 
  seg- 
  

   ment 
  of 
  female 
  almost 
  as 
  long 
  as 
  three 
  preceding 
  sclerites 
  combined, 
  

   notch 
  in 
  center 
  of 
  posterior 
  margin 
  extending 
  almost 
  to 
  the 
  base. 
  

  

  