﻿156 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  io3 
  

  

  Family 
  Cephaloidae 
  LeConte 
  

  

  Cephaloidae 
  LeConte, 
  Smithsonian 
  Misc. 
  Coll., 
  vol. 
  3, 
  art. 
  3, 
  Classification 
  of 
  the 
  

   Coleoptera 
  of 
  North 
  America, 
  pt. 
  1, 
  p. 
  259, 
  1862. 
  

  

  LeConte 
  originally 
  proposed 
  this 
  family 
  for 
  the 
  North 
  American 
  

   Cephaloon 
  lepturides 
  Newman, 
  but 
  also 
  referred 
  to 
  two 
  species, 
  al- 
  

   though 
  not 
  by 
  name, 
  which 
  had 
  been 
  described 
  by 
  Motschulsky 
  from 
  

   the 
  Amur 
  River 
  Valley. 
  Several 
  genera 
  have 
  since 
  been 
  erected 
  for 
  

   species 
  in 
  this 
  group, 
  and 
  then 
  synonymized, 
  until 
  in 
  the 
  present 
  

   study 
  the 
  family 
  contains 
  only 
  the 
  original 
  genus 
  Cephaloon 
  Newman. 
  

  

  Family 
  diagnosis. 
  — 
  Size 
  8-20 
  mm. 
  ; 
  head 
  elongate, 
  diamond-shaped, 
  

   deflexed; 
  antennae 
  11-segmented, 
  filiform, 
  with 
  apical 
  segments 
  some- 
  

   what 
  enlarged, 
  inserted 
  between 
  the 
  eyes 
  and 
  bases 
  of 
  the 
  mandibles; 
  

   mandibles 
  elongate, 
  acute 
  at 
  apex, 
  never 
  bifid 
  or 
  otherwise 
  modified; 
  

   eyes 
  reniform, 
  not 
  prominent; 
  maxillary 
  palpus 
  4-segmented, 
  first 
  

   segment 
  small, 
  obscure, 
  apical 
  segment 
  triangular. 
  Pronotum 
  with- 
  

   out 
  lateral 
  margins, 
  smooth, 
  always 
  abruptly 
  narrowed 
  anteriorly 
  

   from 
  the 
  middle. 
  Legs 
  slender; 
  front 
  coxal 
  cavities 
  open 
  behind; 
  

   front 
  and 
  middle 
  coxae 
  prominent, 
  conical; 
  apical 
  spurs 
  of 
  all 
  tibiae 
  

   large, 
  two 
  on 
  each 
  tibia; 
  tarsi 
  5-5-4, 
  the 
  segments 
  all 
  simple, 
  not 
  lobed 
  

   or 
  tomentose 
  beneath; 
  claws 
  pectinate, 
  with 
  a 
  subequal 
  membranous 
  

   lobe 
  beneath 
  each 
  claw. 
  Elytra 
  with 
  vague 
  costae, 
  minutely 
  punctate, 
  

   never 
  striate. 
  Abdomen 
  with 
  5 
  visible 
  sternites 
  in 
  the 
  female, 
  7 
  in 
  

   the 
  male 
  (sternites 
  2 
  +3 
  to 
  9 
  visible 
  in 
  the 
  male). 
  Body 
  covered 
  with 
  

   very 
  fine 
  pubescence. 
  

  

  Male 
  genitalia: 
  Apical 
  abdominal 
  segments 
  (7-9) 
  of 
  the 
  male 
  

   considerably 
  modified. 
  Segment 
  7 
  with 
  sternite 
  and 
  tergite 
  laterally 
  

   fused, 
  forming 
  a 
  globular 
  shaped 
  segment. 
  Segment 
  8 
  with 
  sternite 
  

   and 
  tergite 
  laterally 
  fused, 
  forming 
  two 
  laterally 
  triangular 
  pieces. 
  

   Segment 
  9 
  closely 
  fitted 
  into 
  segment 
  8, 
  the 
  tergite 
  and 
  sternite 
  both 
  

   triangular 
  and 
  filling 
  the 
  emarginations 
  of 
  segment 
  8. 
  Genital 
  organs 
  

   themselves 
  quite 
  simple; 
  paramere 
  two 
  short, 
  freely 
  articulate 
  lobes 
  

   fitted 
  onto 
  the 
  apex 
  of 
  the 
  large 
  troughlike 
  basal 
  piece 
  which 
  more 
  or 
  

   less 
  envelops 
  a 
  simple, 
  small, 
  somewhat 
  curved, 
  and 
  tubelike 
  median 
  

   lobe; 
  no 
  evidence 
  of 
  a 
  tegminite. 
  

  

  Affinities 
  of 
  the 
  family. 
  — 
  The 
  heteromerous 
  tarsi 
  place 
  this 
  family 
  

   in 
  the 
  Tenebrionoidea; 
  the 
  open 
  anterior 
  coxal 
  cavities 
  place 
  itjn^the 
  

   group 
  including 
  the 
  Oedemeridae, 
  Pythidae, 
  and 
  Serropalpidae, 
  as 
  

   distinguished 
  from 
  the 
  group 
  including 
  the 
  Alleculidae,\Lagriidae, 
  

   and 
  Tenebrionidae, 
  all 
  of 
  which 
  have 
  closed 
  coxal 
  cavities. 
  The 
  ser- 
  

   rate 
  claws 
  with 
  fleshy 
  pulvilli 
  and 
  the 
  laterally 
  fused 
  eighth 
  abdominal 
  

   segment 
  of 
  the 
  male 
  separate 
  it 
  from 
  the 
  others 
  of 
  this 
  group 
  of 
  Teneb- 
  

   rionoidea. 
  The 
  very 
  small 
  median 
  lobe 
  and 
  the 
  larger 
  paramere 
  

   with 
  the 
  small 
  lateral 
  lobes 
  show 
  affinities 
  with 
  the 
  genus 
  Mycterus 
  of 
  

  

  