﻿390 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM. 
  vol. 
  xx. 
  

  

  One 
  male, 
  3 
  females. 
  Los 
  Angeles, 
  California, 
  Ooquillett 
  (U.S.N.jM. 
  — 
  

   Biley 
  collection). 
  

  

  This 
  species 
  closely 
  resembles 
  tlie 
  preceding-, 
  but 
  is 
  rather 
  slenderer, 
  

   especially 
  the 
  male, 
  with 
  less 
  pronounced 
  crimson 
  markings, 
  besides 
  

   the 
  differences 
  noted 
  in 
  the 
  table. 
  

  

  27. 
  OEDALEONOTUS, 
  new 
  genus. 
  

   (0/5trA£'o?, 
  swollen; 
  vGjto<^, 
  back.) 
  

  

  Body 
  stout, 
  heavy 
  and 
  clumsy. 
  Head 
  large 
  and 
  full, 
  the 
  vertex 
  well 
  

   arched, 
  raised 
  considerably 
  above 
  the 
  level 
  of 
  the 
  jirothorax, 
  the 
  fas- 
  

   tigium 
  broad, 
  broadly 
  and 
  sballowly 
  sulcate 
  and 
  considerably 
  declivent, 
  

   the 
  eyes 
  separated 
  rather 
  widely; 
  face 
  nearly 
  vertical: 
  frontal 
  costa 
  

   very 
  broad, 
  subequal, 
  nearly 
  plane, 
  percurreiit 
  but 
  sometimes 
  obscure 
  

   basally; 
  eyes 
  rather 
  large, 
  not 
  very 
  prominent, 
  broadly 
  ovate, 
  with 
  a 
  

   slight 
  production 
  above 
  anteriorly; 
  antennae 
  not 
  slender, 
  uniform, 
  

   slightly 
  longer 
  (male) 
  or 
  slightly 
  shorter 
  (female) 
  than 
  head 
  and 
  pronotum 
  

   together, 
  Pronotum 
  short 
  and 
  stout, 
  enlarging 
  posteriorly 
  only 
  by 
  the 
  

   slight 
  tiare 
  of 
  the 
  metazona, 
  with 
  vertical 
  though 
  slightly 
  tumid 
  lateral 
  

   lobes, 
  more 
  or 
  less 
  flaring 
  on 
  the 
  metazona 
  below, 
  separated 
  from 
  the 
  

   dorsum 
  by 
  more 
  or 
  less 
  pronounced, 
  coarse, 
  rounded 
  rugae, 
  generally 
  

   interrui)ted 
  on 
  the 
  posterior 
  portion 
  of 
  the 
  prozona, 
  the 
  median 
  carina 
  

   interrupted 
  between 
  the 
  sulci; 
  disk 
  of 
  prozona 
  distinctly 
  tumid, 
  but 
  

   little 
  longer 
  than 
  the 
  metazona, 
  from 
  which 
  it 
  is 
  separated 
  by 
  a 
  very 
  

   deep 
  sulcus, 
  its 
  own 
  posterior 
  transverse 
  sulci 
  deeply 
  impressed, 
  

   approximate, 
  and 
  subparallel, 
  the 
  anterior 
  submarginal 
  sulcus 
  also 
  very 
  

   distinct, 
  the 
  margin 
  being 
  elevated 
  to 
  receive 
  the 
  head 
  ; 
  metazona 
  plane, 
  

   punctatorugulose, 
  very 
  obtusely 
  angulate 
  behind, 
  the 
  border 
  margi- 
  

   nate. 
  Prosternal 
  spine 
  short, 
  conical, 
  blunt; 
  meso- 
  and 
  metastethia 
  

   together 
  distinctly 
  longer 
  than 
  broad 
  in 
  both 
  sexes, 
  the 
  mesosternal 
  

   lobes 
  a 
  little 
  longer 
  than 
  broad 
  in 
  both 
  sexes, 
  the 
  metasternal 
  lobes 
  

   subattingent 
  in 
  the 
  male, 
  slightly 
  distant 
  in 
  the 
  female, 
  the 
  space 
  

   behind 
  the 
  latter 
  laterally 
  elongate, 
  extending 
  forward 
  to 
  the 
  coxae. 
  

   Tegmina 
  fully 
  developed 
  or 
  abbreviate, 
  rarely 
  shorter 
  than 
  the 
  prono- 
  

   tum 
  and 
  then 
  but 
  slightly. 
  Hind 
  femora 
  stout, 
  heavy, 
  and 
  tumid, 
  the 
  

   inferior 
  genicular 
  lobe 
  pallid, 
  immaculate. 
  Abdomen 
  of 
  female 
  with 
  

   abbreviated 
  terminal 
  segments 
  (recalling 
  Bradynotes) 
  and 
  partially 
  

   exserted 
  ovipositor; 
  of 
  male 
  not 
  enlarged 
  at 
  the 
  extremity 
  and 
  scarcely 
  

   elevated, 
  terminating 
  roundly 
  and 
  bluntly, 
  the 
  last 
  ventral 
  segment 
  (in 
  

   advance 
  of 
  the 
  subgenital 
  plate) 
  scarcely 
  longer 
  than 
  the 
  i)enultiraate; 
  

   subgenital 
  plate 
  of 
  male 
  very 
  brief 
  and 
  subequal, 
  its 
  lateral 
  margins 
  

   distinctly 
  ampliate 
  at 
  the 
  base 
  and 
  entire 
  apically, 
  with 
  no 
  tubercle; 
  

   cerci 
  tumid 
  and 
  enlarged 
  at 
  base, 
  suddenly 
  contracted, 
  and 
  terminating^ 
  

   in 
  a 
  slender 
  posterior 
  process. 
  

  

  This 
  genus 
  is 
  (piickly 
  separated 
  from 
  those 
  in 
  its 
  immediate 
  vicinity 
  

   by 
  the 
  tumidity 
  of 
  the 
  prozona, 
  and 
  the 
  clumsy 
  form, 
  which 
  give 
  it 
  a 
  

   very 
  distinct 
  appearance. 
  

  

  