﻿REVISION 
  OF 
  TRIBE 
  CERESINI 
  — 
  CALDWELL 
  503 
  

  

  form 
  has 
  the 
  teeth 
  of 
  the 
  lateral 
  valves 
  rounded 
  or 
  obtuse 
  apically, 
  

   the 
  styles 
  with 
  their 
  apices 
  deflected 
  ventrally 
  in 
  lateral 
  aspect 
  and 
  

   evenly 
  convergently 
  curved 
  in 
  ventral 
  aspect. 
  This 
  latter 
  form 
  is 
  

   slightly 
  larger 
  than 
  typical 
  taurina, 
  but 
  all 
  the 
  characters 
  that 
  might 
  

   serve 
  to 
  differentiate 
  the 
  two 
  forms 
  are 
  gradational 
  in 
  an 
  extensive 
  

   series 
  of 
  specimens. 
  It 
  is 
  well 
  to 
  note 
  here 
  that 
  the 
  specimen 
  in 
  the 
  

   U. 
  S. 
  National 
  Museum, 
  labeled 
  type 
  of 
  illinoiensis, 
  is 
  conspecific 
  

   with 
  typical 
  taurina; 
  therefore, 
  illinoiensis 
  is 
  a 
  synonym 
  of 
  taurina 
  and 
  

   is 
  not 
  a 
  synonym 
  of 
  constans 
  (Walker) 
  as 
  believed 
  by 
  Van 
  Duzee; 
  

   however, 
  there 
  is 
  a 
  specimen 
  labeled 
  '^ 
  illinoiensis 
  n. 
  sp." 
  in 
  the 
  U. 
  S. 
  

   National 
  Museum 
  collection 
  that 
  is 
  conspecific 
  with 
  constans. 
  

  

  The 
  interpretation 
  of 
  borealis 
  is 
  based 
  on 
  specimens 
  determined 
  by 
  

   Funkhouser 
  that 
  fit 
  the 
  meager 
  description 
  given 
  by 
  Fairmaire. 
  It 
  is 
  

   a 
  small, 
  short-horned 
  species 
  occurring 
  across 
  northern 
  United 
  States 
  

   from 
  the 
  Atlantic 
  to 
  the 
  Pacific 
  coast 
  and 
  as 
  far 
  south 
  as 
  Arizona. 
  

   The 
  styles 
  are 
  slender 
  and 
  deflected 
  ventrally 
  at 
  their 
  apices, 
  and 
  the 
  

   posterior 
  arm 
  of 
  the 
  aedea.gus 
  is 
  more 
  slender 
  in 
  proportion 
  to 
  the 
  size 
  

   of 
  the 
  entire 
  insect 
  than 
  in 
  other 
  species. 
  

  

  STICTOCEPHALA 
  CURVATA. 
  new 
  species 
  

  

  Plate 
  20 
  

  

  Length, 
  male 
  8.8 
  mm., 
  female 
  9.6 
  mm.; 
  width 
  across 
  horns 
  approxi- 
  

   mating 
  3.8 
  mm. 
  in 
  either 
  sex. 
  General 
  color 
  of 
  dried 
  specimens 
  orange- 
  

   yellow, 
  suprahumeral 
  horns 
  tipped 
  with 
  polished 
  black. 
  

  

  Thorax 
  highly 
  arched; 
  metopidium 
  widening 
  to 
  suprahumerals, 
  

   roundedly 
  curved 
  from 
  suprahumerals 
  to 
  dorsal 
  crest; 
  suprahumerals 
  

   produced 
  into 
  minute, 
  obtuse 
  horns; 
  posterior 
  process 
  continuing 
  curve 
  

   of 
  crest, 
  narrowed 
  from 
  ventral 
  margins 
  well 
  before 
  apex. 
  

  

  Male 
  with 
  teeth 
  of 
  lateral 
  valves 
  slender, 
  acute. 
  Sternal 
  plate 
  deep 
  

   basally, 
  apex 
  with 
  very 
  small 
  but 
  sharp 
  V-shaped 
  notch. 
  Styles 
  con- 
  

   cave 
  basally 
  in 
  lateral 
  aspect, 
  strongly 
  convergent 
  apicially 
  in 
  ventral 
  

   aspect; 
  apices 
  flattened, 
  broadly 
  rounded. 
  Posterior 
  arm 
  of 
  aedeagus 
  

   suddenly 
  narrowed 
  apically 
  in 
  lateral 
  aspect; 
  lateral 
  membranes 
  on 
  

   either 
  side 
  somewhat 
  serrate 
  ; 
  a 
  small 
  hoodlike 
  process 
  present 
  subapi- 
  

   cally 
  on 
  anterior 
  sm-face 
  formed 
  by 
  union 
  of 
  lateral 
  membranes. 
  

  

  Last 
  ventral 
  segment 
  of 
  female 
  with 
  broad 
  notch 
  in 
  center 
  of 
  poste- 
  

   rior 
  margin 
  reaching 
  half 
  the 
  depth 
  of 
  the 
  segment; 
  sides 
  of 
  notch 
  

   broadly 
  sinuate. 
  

  

  Holotype 
  male 
  (U.S. 
  N. 
  M. 
  No. 
  57640), 
  three 
  male 
  paratypes, 
  female 
  

   allotype, 
  and 
  four 
  female 
  paratypes 
  from 
  "Cams," 
  Nebr., 
  July 
  1902, 
  

   on 
  Symphoricarpos 
  (Pierce); 
  and 
  one 
  male 
  paratype, 
  "C. 
  Mo.," 
  July. 
  

  

  Similar 
  in 
  appearance 
  to 
  brevicornis 
  (Fitch) 
  but 
  with 
  much 
  smaller 
  

   suprahumerals 
  and 
  different 
  genitalia. 
  

  

  