﻿CHALCIDOIDEA 
  RELATED 
  TO 
  CEROCEPHALA 
  — 
  GAHAN 
  369 
  

  

  wide 
  and 
  deep 
  furrow 
  extending 
  from 
  behind 
  the 
  ocelli 
  to 
  the 
  

   antennae 
  and 
  carinated 
  in 
  the 
  middle, 
  the 
  keel 
  running 
  down 
  to 
  

   the 
  centre." 
  The 
  marginal 
  vein 
  is 
  said 
  to 
  be 
  longer 
  tiian 
  the 
  sub- 
  

   marginal, 
  and 
  there 
  is 
  a 
  tuft 
  of 
  hairs 
  at 
  the 
  junction 
  of 
  the 
  two 
  

   veins. 
  

  

  Cameron's 
  rigures 
  of 
  the 
  male 
  and 
  female 
  apparently 
  differ 
  so 
  

   widely 
  in 
  characters 
  of 
  the 
  head 
  as 
  to 
  raise 
  a 
  suspicion 
  that 
  they 
  

   are 
  not 
  congeneric. 
  The 
  male 
  should 
  be 
  considered 
  the 
  holotype. 
  

  

  Described 
  from 
  Panama. 
  

  

  6. 
  Genus 
  ACEROCEPHALA. 
  new 
  genus 
  

  

  Because 
  of 
  the 
  differently 
  shaped 
  head, 
  greatly 
  elongated 
  man- 
  

   dibles, 
  and 
  the 
  absence 
  of 
  a 
  tuft 
  of 
  hairs 
  at 
  the 
  juncture 
  of 
  the 
  

   snbmarginal 
  and 
  marginal 
  veins 
  of 
  the 
  forewing, 
  it 
  seems 
  advis- 
  

   able 
  to 
  remove 
  Cerocephala 
  atroviolacea 
  Crawford 
  from 
  Cero- 
  

   cephala 
  and 
  erect 
  a 
  new 
  genus 
  for 
  it. 
  The 
  new 
  genus 
  apparently 
  

   resembles 
  Paralaesthia 
  Cameron, 
  but 
  if 
  Cameron's 
  description 
  is 
  

   accurate 
  they 
  may 
  be 
  readily 
  separated 
  by 
  the 
  characters 
  used 
  in 
  

   the 
  key. 
  Acerocephala 
  differs 
  further 
  by 
  the 
  absence 
  of 
  any 
  

   groove 
  or 
  depression 
  down 
  the 
  middle 
  of 
  the 
  frons. 
  

  

  Female. 
  — 
  Head 
  large, 
  viev^^ed 
  from 
  in 
  front 
  subrectangular. 
  

   very 
  slightly 
  broader 
  at 
  mouth 
  than 
  at 
  vertex, 
  its 
  dorsal 
  line 
  

   nearly 
  straight, 
  its 
  ventral 
  line 
  (when 
  the 
  mandibles 
  are 
  closed) 
  

   squarely 
  truncate, 
  its 
  sides 
  straight 
  and 
  diverging 
  slightly 
  below: 
  

   face 
  deeply 
  impressed; 
  lateral 
  margins 
  of 
  facial 
  depression 
  

   rounded, 
  without 
  projections 
  ; 
  clypeus 
  not 
  defined 
  ; 
  labrum 
  large, 
  

   completely 
  exposed; 
  mandibles 
  large, 
  about 
  one-third 
  as, 
  long 
  as 
  

   ihe 
  length 
  of 
  head, 
  squarely 
  truncate 
  at 
  apex 
  and 
  each 
  with 
  four 
  

   subequal 
  short 
  teeth 
  ; 
  eyes 
  small, 
  not 
  prominent, 
  obviously 
  much 
  

   less 
  than 
  half 
  the 
  length 
  of 
  head; 
  ocelli 
  in 
  a 
  slightly 
  obtuse 
  tri- 
  

   angle; 
  ocellocular 
  line 
  approximately 
  equal 
  to 
  distance 
  between 
  

   posterior 
  ocelli 
  ; 
  scrobes 
  deep 
  anteriorly, 
  shallower 
  above, 
  not 
  

   reaching 
  to 
  anterior 
  ocellus; 
  between 
  the 
  antennae 
  a 
  high, 
  nar- 
  

   row, 
  dorsally 
  flattened 
  plate 
  originating 
  some 
  divStaii'.'e 
  l)elow 
  

   anterioi- 
  ocellus 
  and 
  either 
  abruptly 
  truncated 
  or 
  gradually 
  

   declivous 
  from 
  a 
  point 
  just 
  below 
  the 
  antennal 
  foveae. 
  Antennae 
  

   in.serted 
  distinctly 
  below 
  the 
  ventral 
  margins 
  of 
  eyes, 
  9-segmented 
  : 
  

   .scape 
  slender 
  at 
  base, 
  becoming 
  thicker 
  in 
  apical 
  two-thirds, 
  about 
  

   four 
  times 
  as 
  long 
  as 
  broad, 
  not 
  compres.sed 
  ; 
  pedicel 
  pyriform. 
  

   about 
  one 
  and 
  one-half 
  times 
  as 
  long 
  as 
  broad; 
  funicle 
  6-seg- 
  

   mented. 
  the 
  segments 
  all 
  narrower 
  at 
  base 
  than 
  at 
  apex, 
  subetiual 
  

   in 
  length 
  but 
  successively 
  increasing 
  in 
  breadth; 
  first 
  funicular 
  

   .segment 
  as 
  long 
  aa 
  or 
  longer 
  than 
  broad 
  and 
  no 
  longer 
  than 
  

   pedicel, 
  sixth 
  very 
  slightly 
  broader 
  than 
  long; 
  club 
  ovate, 
  solid. 
  

  

  