﻿CHALCIDOIDEA 
  RELATED 
  TO 
  CEROCEPHALA 
  GAHAN 
  371 
  

  

  scape, 
  and 
  pedicel 
  rufotestaceous 
  : 
  flag-ellum 
  black 
  and 
  shining; 
  

   abdomen 
  with 
  the 
  petiole 
  more 
  or 
  less 
  rufous, 
  the 
  gaster 
  black 
  

   slightly 
  diluted 
  with 
  red 
  basally: 
  le.trs 
  concolorous 
  with 
  thorax 
  

   except 
  all 
  tarsi 
  and 
  more 
  or 
  less 
  of 
  anterior 
  tibiae 
  reddish 
  tes- 
  

   taceous. 
  Wings 
  hyaline, 
  the 
  forewing 
  with 
  a 
  brownish 
  trans- 
  

   verse 
  band 
  embracing 
  all 
  of 
  stigmal 
  vein 
  and 
  approximately 
  the 
  

   apical 
  two-fifths 
  of 
  marginal 
  vein 
  : 
  venation 
  brownish, 
  the 
  callus 
  

   black. 
  

  

  Body 
  mostly 
  smooth 
  and 
  polished 
  ; 
  head 
  mostly 
  smooth 
  but 
  with 
  

   scrobal 
  cavity, 
  narrow 
  border 
  along 
  each 
  side 
  of 
  scrobes. 
  and 
  the 
  

   sloping 
  inner 
  walls 
  of 
  facial 
  depression 
  weakly 
  aciculated 
  and 
  

   ventral 
  surface 
  of 
  head 
  weakly 
  reticulated; 
  raised 
  plate 
  between 
  

   antennae 
  polished 
  dorsally, 
  narrowly 
  wedge-shaped, 
  broadest 
  an- 
  

   teriorly, 
  and 
  abruptly 
  perpendicularly 
  truncate 
  just 
  below 
  an- 
  

   tennae; 
  labrum 
  squarely 
  truncate 
  at 
  apex; 
  scrobal 
  grooves 
  deep 
  

   and 
  extending 
  more 
  than 
  half 
  the 
  distance 
  from 
  antennal 
  foveae 
  

   to 
  anterior 
  ocellus; 
  neck 
  of 
  pronotum 
  weakly 
  reticulated; 
  meso- 
  

   pleura 
  reticulated; 
  propodeum 
  for 
  the 
  most 
  part 
  very 
  finely 
  

   transversely 
  lineated, 
  smooth 
  posteriorly; 
  abdominal 
  petiole 
  obvi- 
  

   ously 
  a 
  little 
  longer 
  than 
  broad 
  and 
  a 
  little 
  broader 
  at 
  base 
  than 
  

   at 
  apex 
  ; 
  gaster 
  entirely 
  smooth 
  and 
  polished, 
  not 
  quite 
  as 
  long 
  as 
  

   thorax; 
  ovipositor 
  slightly 
  exserted, 
  never 
  more 
  than 
  one-fifth 
  as 
  

   long 
  as 
  gaster. 
  

  

  Male. 
  — 
  Unknown. 
  

  

  Remarks. 
  — 
  Redescribed 
  from 
  the 
  type 
  series 
  and 
  two 
  subse- 
  

   quently 
  acquired 
  specimens. 
  The 
  types 
  were 
  reared 
  from 
  a 
  

   scolytid 
  infesting 
  cones 
  of 
  pinyon 
  (Piuvs 
  edulis) 
  at 
  Las 
  Vegas, 
  

   N. 
  Mex. 
  The 
  two 
  more 
  recently 
  acquired 
  specimens 
  are 
  labeled 
  

   as 
  having 
  been 
  reared 
  from 
  Conopkthoncs 
  edulis 
  Hopkins 
  infest- 
  

   ing 
  cones 
  of 
  Pinus 
  edulis 
  at 
  Ute 
  Pass, 
  Colo., 
  and 
  are 
  recorded 
  

   under 
  Hopkins 
  U. 
  S. 
  No. 
  9099e. 
  

  

  ACEROCEPHALA 
  AENIGMA. 
  new 
  gpcries 
  

  

  Platk 
  47, 
  Figures 
  6, 
  6a; 
  Plate 
  48, 
  Figures 
  4, 
  4a 
  

   The 
  specimens 
  upon 
  which 
  this 
  species 
  is 
  based 
  were 
  at 
  first 
  

   believed 
  to 
  represent 
  merely 
  a 
  varietal 
  form 
  of 
  ntroviolacea. 
  

   More 
  careful 
  examination 
  of 
  the 
  few 
  specimens 
  available 
  has 
  

   shown 
  certain 
  apparently 
  constant 
  characters 
  by 
  which 
  they 
  differ 
  

   from 
  ofroviolacrn, 
  however, 
  and 
  makes 
  it 
  appear 
  necessary 
  to 
  

   treat 
  them 
  as 
  a 
  separate 
  species. 
  

  

  Female. 
  — 
  Length 
  2.75 
  mm. 
  Agreeing 
  with 
  the 
  description 
  of 
  

   afroviolacea 
  except 
  in 
  the 
  following 
  particulars: 
  Body 
  shining 
  

   black 
  with 
  no 
  suggestion 
  of 
  green 
  on 
  dorsum 
  or 
  elsewhere; 
  pedicel 
  

   and 
  apex 
  of 
  scape 
  piceoua; 
  aciculations 
  on 
  front 
  of 
  head 
  stronger 
  

  

  