﻿260. 
  EEPORT 
  UNITED 
  STATES 
  ENTOMOLOGICAL 
  COMMISSION. 
  

  

  Antennae 
  minute, 
  very 
  short, 
  2-jointed, 
  the 
  joints 
  much 
  shorter 
  than 
  

   broad 
  (when 
  retracted), 
  and 
  the 
  2d 
  joint 
  blunt 
  at 
  tip. 
  Mandibles 
  

   large, 
  with 
  three 
  teeth 
  on 
  the 
  cutting 
  edge. 
  Maxilla? 
  composed 
  of 
  

   two 
  broad 
  segments, 
  and 
  a 
  third 
  narrower 
  one 
  bearing 
  the 
  maxillary 
  

   lobe 
  and 
  palpus; 
  the 
  lobe 
  long 
  and 
  narrow, 
  curved 
  inward, 
  reaching 
  

   to 
  the 
  middle 
  of 
  the 
  3d 
  palpal 
  joint 
  5 
  palpus 
  3-jointed, 
  the 
  basal 
  joint 
  

   somewhat 
  swollen 
  at 
  the 
  end; 
  2d 
  as 
  long 
  as 
  the 
  1st, 
  tapering 
  toward 
  

   the 
  distal 
  end 
  ; 
  3d 
  small, 
  conical, 
  as 
  long 
  as 
  the 
  2d 
  is 
  thick. 
  Mentum 
  

   wider 
  than 
  long, 
  square 
  ; 
  ligula 
  square, 
  but 
  slightly 
  convex 
  on 
  front 
  

   edge; 
  labial 
  palpi 
  3-jointed, 
  2d 
  joint 
  a 
  little 
  slenderer 
  than 
  1st, 
  but 
  of 
  

   the 
  same 
  length 
  ; 
  3d 
  joint 
  slender 
  and 
  as 
  long 
  as 
  the 
  2d 
  is 
  thick. 
  

  

  Prothoracic 
  segment 
  not 
  so 
  much 
  wider 
  than 
  the 
  rest 
  of 
  the 
  body 
  as 
  

   in 
  the 
  Longicoru 
  larvae 
  in 
  general 
  ; 
  sides 
  straight, 
  retreating 
  posteriorly 
  ; 
  

   surface 
  flat 
  and 
  chitinous; 
  meso- 
  and 
  metathoracic 
  segments 
  as 
  wide 
  as 
  

   the 
  prothoracic, 
  but 
  a 
  little 
  more 
  than 
  one-half 
  as 
  long 
  as 
  the 
  1st 
  ab- 
  

   dominal 
  segment. 
  Thoracic 
  feet 
  long 
  and 
  slender, 
  4-jointed, 
  the 
  4th 
  

   joint 
  minute, 
  corneous, 
  2d 
  and 
  3d 
  joints 
  of 
  the 
  same 
  length, 
  the 
  3d 
  two- 
  

   thirds 
  as 
  thick 
  as 
  the 
  2d. 
  

  

  Abdominal 
  segments 
  increasing 
  very 
  slightly 
  in 
  length 
  to 
  the 
  8th, 
  

   which 
  is 
  slightly 
  longer 
  than 
  the 
  preceding 
  ones, 
  but 
  a 
  little 
  narrower 
  

   than 
  the 
  7th 
  ; 
  the 
  9th 
  shorter 
  and 
  nearly 
  one-quarter 
  narrower 
  than 
  

   the 
  8th 
  ; 
  the 
  10th 
  scarcely 
  visible 
  from 
  above, 
  one-quarter 
  to 
  one-fifth 
  

   as 
  wide 
  as 
  the 
  9th, 
  and 
  deeply 
  cleft 
  posteriorly. 
  Callosities 
  very 
  large, 
  

   soft, 
  not 
  well 
  defined, 
  being 
  elongate, 
  transversely-oval 
  areas, 
  bounded 
  

   laterally 
  by 
  curvilinear 
  impressed 
  lines. 
  Beneath, 
  the 
  callosities 
  are 
  

   a 
  little 
  more 
  distinctly 
  marked, 
  with 
  a 
  transverse 
  deeply-impressed 
  

   straight, 
  median 
  line 
  into 
  which 
  short 
  curved 
  lines 
  pass, 
  the 
  whole 
  area 
  

   being 
  oval-cylindrical, 
  compressed 
  in 
  the 
  middle. 
  The 
  hairs 
  on 
  the 
  body 
  

   rather 
  long. 
  

  

  Length 
  of 
  the 
  body, 
  26-30™°^ 
  ; 
  in 
  one 
  30°^^ 
  in 
  length 
  the 
  head 
  is 
  3-4°^°* 
  

   long 
  and 
  6°^°^ 
  broad 
  ; 
  prothorax 
  2.3""^ 
  long 
  and 
  6™^ 
  broad 
  ; 
  breadth 
  of 
  

   8th 
  abdominal 
  segment, 
  5°^™. 
  

  

  This 
  larva 
  is 
  very 
  common 
  under 
  the 
  bark 
  of 
  pines 
  which 
  have 
  been 
  

   cut 
  down 
  for 
  a 
  year 
  or 
  more, 
  so 
  that 
  the 
  larva 
  evidently 
  gets 
  its 
  growth 
  

   in 
  a 
  year. 
  It 
  may 
  be 
  easil}^ 
  recognized 
  by 
  its 
  large 
  size, 
  the 
  broad, 
  

   flattened 
  head 
  and 
  body, 
  the 
  latter 
  not 
  narrowing 
  behind; 
  the 
  pro- 
  

   thorax 
  is 
  small 
  in 
  proportion 
  to 
  the 
  head, 
  while 
  the 
  antennae 
  are 
  minute, 
  

   2-jointed. 
  The 
  form 
  of 
  the 
  body, 
  and 
  especially 
  of 
  the 
  hard, 
  corneous 
  

   head, 
  admirably 
  adapts 
  it 
  for 
  its 
  work 
  of 
  loosening 
  the 
  bark, 
  and 
  thus 
  • 
  

   forwarding 
  the 
  decay 
  of 
  stumps 
  and 
  fallen 
  trees. 
  

  

  THE 
  LESSER 
  PRIONUS. 
  

  

  OrtJiosoma 
  hrunneum 
  (DeGeer). 
  PI. 
  X, 
  Fig. 
  1, 
  

  

  In 
  addition 
  to 
  the 
  description 
  on 
  p. 
  161 
  of 
  Bulletin 
  7, 
  the 
  following 
  

   characters 
  may 
  be 
  noted: 
  

   Head 
  about 
  one-h 
  alf 
  as 
  wide 
  as 
  the 
  prothorax. 
  Front 
  edge 
  of 
  epicra- 
  

  

  