﻿OF 
  THE 
  UNITED 
  STATES. 
  f)0 
  I 
  

  

  valde 
  inflezo, 
  et 
  hide 
  indistincto 
  ; 
  cozse 
  anticse 
  et 
  intermedin 
  prvecipue 
  maiusculse, 
  posticx 
  laminis 
  

   Vitus 
  sensim 
  dilatatis; 
  tarsi 
  pubescentes, 
  non 
  lobati, 
  unguiculis 
  simplicibus: 
  abdomen 
  artieulo 
  ">"' 
  in 
  

   aliis 
  rotundato, 
  in 
  aliis 
  truncato. 
  

  

  Our 
  genera 
  may 
  be 
  thus 
  arranged: 
  

  

  A. 
  Abdomen 
  artieulo 
  5*° 
  postice 
  rotundato, 
  sexto 
  abscondito 
  : 
  

  

  Antennae 
  filiformes; 
  frons 
  margine 
  porrecto 
  .... 
  Aphricus. 
  

  

  Antennas 
  flabellatae; 
  frons 
  non 
  marginata: 
  

  

  Antennas 
  11-articulatae 
  - 
  - 
  , 
  . 
  . 
  . 
  Plastocerus. 
  

  

  Antennae 
  12-articulatae 
  ...... 
  Euthysanius. 
  

  

  B. 
  Abdomen 
  artieulo 
  5 
  t0 
  truncato, 
  6 
  t0 
  conspicuo: 
  antennas 
  subserratae: 
  

  

  Tarsi 
  mediocres, 
  tibiae 
  anticae 
  apice 
  paulo 
  productee 
  - 
  - 
  - 
  Cebrio. 
  

  

  Tarsi 
  longissimi, 
  tibiae 
  anticae 
  bidentatae 
  ----- 
  Scaptolenus. 
  

  

  Aphricus 
  Lcc. 
  

  

  Frons 
  concava, 
  antice 
  subrotundata 
  prominula; 
  labrum 
  brevissimum, 
  sub 
  fronte 
  absconditum: 
  man- 
  

   dibulae 
  elongatae 
  falcatae 
  tenues: 
  palpi 
  artieulo 
  ultimo 
  vix 
  dilatator 
  antennae 
  vix 
  serratae, 
  articulis 
  2 
  

   et 
  3 
  coniunctis 
  4'° 
  aequalibus, 
  (ultimo?); 
  prosternum 
  quadratum, 
  lateribus 
  rectis, 
  antice 
  truncatum, 
  

   non 
  lobatum, 
  at 
  linea 
  transversa 
  impressum, 
  postice 
  subito 
  inflexum 
  (non 
  mucronatum?): 
  coxae 
  inter- 
  

   mediae 
  parvae 
  paulo 
  distantes: 
  posticae 
  valde 
  obliquae, 
  laminis 
  intus 
  sensim 
  paulo 
  dilatatis: 
  tarsi 
  lon- 
  

   giusculi, 
  pubescentes, 
  setosi, 
  articulis 
  1 
  — 
  -1 
  subaequalibus, 
  5 
  t0 
  duplo 
  longiore 
  unguiculis 
  integris: 
  tibiae 
  

   omnes 
  tenues, 
  calcaribus 
  parvis: 
  abdomen 
  5-articulatum. 
  

  

  A 
  small 
  insect 
  having 
  very 
  much 
  the 
  appearance 
  of 
  a 
  slender 
  cylindrical 
  Cardiophorus, 
  

   but 
  by 
  its 
  long 
  mandibles, 
  and 
  very 
  short 
  labrum, 
  evidently 
  belonging 
  to 
  the 
  present 
  group: 
  

   the 
  head 
  is 
  exserted, 
  and 
  the 
  eyes 
  are 
  moderately 
  prominent 
  : 
  the 
  thorax 
  is 
  as 
  long 
  as 
  it 
  

   is 
  wide, 
  rounded 
  on 
  the 
  sides, 
  narrowed 
  slightly 
  towards 
  the 
  posterior 
  angles, 
  which 
  are 
  

   diverging 
  and 
  slender; 
  the 
  lateral 
  margin 
  is 
  not 
  apparent; 
  the 
  scutellum 
  is 
  emarginate 
  in 
  

   front, 
  and 
  acute 
  behind; 
  the 
  elytra 
  are 
  scarcely 
  wider 
  than 
  'the 
  thorax, 
  and 
  nearly 
  parallel 
  

   on 
  the 
  sides. 
  The 
  prosternum 
  posteriorly 
  is 
  suddenly 
  indexed 
  so 
  much, 
  that 
  1 
  am 
  unable 
  

   to 
  see 
  if 
  it 
  is 
  mucronate 
  at 
  tip; 
  the 
  mesosternum, 
  however, 
  is 
  visible 
  between 
  the 
  middle 
  

   coxae, 
  and 
  appears 
  concave 
  in 
  its 
  deepest 
  part; 
  the 
  middle 
  coxae 
  are 
  smaller 
  than 
  in 
  the 
  

   other 
  genera 
  of 
  this 
  group, 
  and 
  are 
  visibly 
  separated. 
  The 
  posterior 
  coxae 
  are 
  also 
  di- 
  

   vergent 
  at 
  their 
  inner 
  tip, 
  as 
  in 
  the 
  genuine 
  Elateridae; 
  while 
  in 
  the 
  following 
  genera 
  they 
  

   lie 
  close 
  together. 
  

  

  The 
  name 
  is 
  derived 
  from 
  a<ppixos 
  (a 
  et 
  <?>p(£) 
  quasi 
  mutus. 
  

  

  1. 
  A. 
  cali 
  f 
  o 
  r 
  n 
  i 
  cus, 
  nigro-piceus, 
  griseo-pubescens, 
  capite 
  scabro-punctato, 
  thorace 
  convexo, 
  

   quadrato, 
  lateribus 
  rotundato, 
  subtiliter 
  punctulato, 
  angulis 
  posticis 
  valde 
  divergentibus, 
  elytris 
  striis 
  

   punctatis, 
  interstitiis 
  punctulatis, 
  5 
  t0 
  pone 
  medium 
  leviter 
  carinato, 
  antennis 
  pedibusque 
  piceis. 
  

   Long. 
  - 
  25. 
  

  

  One 
  specimen, 
  San 
  Diego, 
  California. 
  The 
  striae 
  of 
  the 
  elytra 
  are 
  deeper 
  towards 
  the 
  

   base, 
  so 
  that 
  the 
  interstices 
  are 
  there 
  slightly 
  convex; 
  posteriorly 
  the 
  strirc 
  become 
  merely 
  

   rows 
  of 
  oblong 
  points; 
  the 
  elevation 
  of 
  the 
  fifth 
  interstice 
  behind 
  the 
  middle 
  is 
  altogether 
  

   anomalous, 
  and 
  readies 
  quite 
  to 
  the 
  apex. 
  

  

  