﻿254 
  REPORT 
  UNITED 
  STATES 
  ENTOMOLOGICAL 
  COMMISSION. 
  

  

  length 
  of 
  the 
  disk. 
  On 
  the 
  under 
  side 
  the 
  disk 
  is 
  subtrapezoidal, 
  widen. 
  

   ing 
  at 
  base, 
  the 
  sides 
  hollowed 
  out, 
  and 
  narrower 
  than 
  long. 
  The 
  meso- 
  

   and 
  metathoracic 
  segments 
  unusually 
  long, 
  and 
  of 
  the 
  same 
  size, 
  being 
  

   about 
  two-thirds 
  as 
  wide 
  as 
  the 
  prothorax. 
  

  

  1st 
  abdominal 
  a 
  little 
  shorter 
  than 
  the 
  2d 
  abdominal 
  segment; 
  seg- 
  

   ments 
  2 
  and 
  8 
  of 
  the 
  same 
  size, 
  and 
  very 
  full 
  and 
  rounded 
  on 
  the 
  sides. 
  

   The 
  9th 
  segment 
  somewhat 
  narrower 
  than 
  the 
  8tb, 
  and 
  the 
  10th 
  is 
  one- 
  

   third 
  to 
  one-half 
  as 
  wide 
  as 
  the 
  9th. 
  Length 
  12-19™™; 
  in 
  one 
  12™™ 
  long 
  

   the 
  prothorax 
  is 
  1™™ 
  long 
  and 
  2.5™™ 
  broad; 
  the 
  8th 
  abdominal 
  segment 
  

   about 
  1.5™™ 
  broad. 
  

  

  This 
  is 
  evidentl^^ 
  a 
  species 
  of 
  Melano])hila, 
  and 
  differs 
  from 
  the 
  other 
  

   genera 
  mentioned 
  in 
  the 
  short 
  and 
  wide 
  pro 
  thoracic 
  segment, 
  in 
  the 
  

   very 
  small 
  disk 
  inclosing 
  a 
  narrow 
  V, 
  and 
  being 
  trax)ezoidal 
  beneath, 
  

   while 
  the 
  abdominal 
  segments 
  are 
  very 
  convex, 
  and 
  broad 
  in 
  propor- 
  

   tion 
  to 
  the 
  prothorax. 
  It 
  may 
  also 
  be 
  identified 
  by 
  the 
  very 
  slightly 
  

   bilobed 
  labium 
  and 
  well- 
  developed 
  maxillae. 
  

  

  This 
  is 
  No. 
  2 
  ''unknown 
  Buprestid 
  larva," 
  on 
  the 
  spruce, 
  p. 
  228 
  of 
  

   Bulletin 
  7, 
  and 
  No. 
  4, 
  p. 
  241, 
  on 
  the 
  hemlock. 
  

  

  Flat-headed 
  spruce 
  borer. 
  (MelanopMlaf) 
  

  

  In 
  the 
  form 
  and 
  size 
  of 
  the 
  head, 
  prothorax, 
  and 
  body, 
  including 
  the 
  

   10th 
  segment, 
  closely 
  like 
  Dicerca, 
  but 
  the 
  sculpturing 
  is 
  decidedly 
  dif- 
  

   ferent. 
  The 
  description 
  of 
  the 
  proportions 
  of 
  the 
  prothorax 
  and 
  succeed- 
  

   ing 
  segments 
  of 
  the 
  body 
  in 
  Dicerca 
  will 
  apply 
  to 
  this 
  species. 
  The 
  

   pro 
  thoracic 
  disk 
  is, 
  however, 
  very 
  different; 
  it 
  is 
  transversely 
  rounded- 
  

   oval, 
  very 
  regular 
  in 
  shape, 
  and 
  smaller 
  than 
  the 
  disk 
  of 
  Dicerca; 
  it 
  is 
  

   considerably 
  wider 
  than 
  long, 
  and 
  the 
  sides 
  are 
  well 
  rounded; 
  the 
  sur- 
  

   face 
  of 
  the 
  disk 
  is 
  slightly 
  convex 
  and 
  covered 
  with 
  short 
  linear 
  chiti- 
  

   nous 
  raised 
  markings, 
  which 
  do 
  not, 
  however, 
  form 
  curvilinear 
  lines,, 
  

   except 
  in 
  a 
  slight 
  degree 
  on 
  the 
  hinder 
  edge, 
  especially 
  in 
  the 
  inverted 
  

   V. 
  The 
  V-shaped 
  mark 
  is 
  much 
  as 
  in 
  Ghrysobothris. 
  The 
  raised 
  mark- 
  

   ings 
  on 
  the 
  disk 
  differ 
  decidedly 
  from 
  those 
  of 
  Ghrysobothris 
  in 
  not 
  

   being 
  round 
  dots, 
  but 
  transversely 
  linear 
  in 
  form. 
  The 
  apex 
  of 
  the 
  V 
  is 
  

   not 
  inclosed 
  in 
  a 
  square 
  area, 
  as 
  in 
  Dicerca, 
  and 
  the 
  V 
  is 
  much 
  nar- 
  

   rower. 
  The 
  disk 
  on 
  the 
  under 
  side 
  of 
  the 
  prothoracic 
  segment 
  is 
  much 
  

   as 
  on 
  the 
  upper, 
  the 
  V 
  being 
  represented 
  by 
  a 
  simple 
  median 
  line. 
  A 
  

   pair 
  of 
  mesothoracic 
  stigmata, 
  and 
  eight 
  abdominal 
  pairs. 
  Head 
  of 
  the 
  

   same 
  size 
  as 
  in 
  Dicerca. 
  Labrum 
  much 
  roimded 
  on 
  the 
  front 
  edge, 
  and 
  

   much 
  more 
  contracted 
  at 
  the 
  insertion 
  in 
  the 
  fleshy 
  clypeus 
  than 
  in 
  Ghry- 
  

   sobothris. 
  Antennae 
  with 
  the 
  2d 
  joint 
  a 
  little 
  longer 
  than 
  in 
  Dicerca, 
  

   the 
  3d 
  joint 
  about 
  one-third 
  as 
  long 
  as 
  the 
  2d 
  joint, 
  tomentose 
  and 
  

   rounded 
  at 
  tip. 
  Labium 
  longer, 
  fuller, 
  more 
  rounded 
  on 
  the 
  front 
  edge, 
  

   and 
  a 
  little 
  narrower 
  than 
  in 
  Dicerca, 
  the 
  edge 
  not 
  being 
  notched. 
  It 
  is 
  

   more 
  contracted 
  at 
  base 
  than 
  in 
  Dicerca, 
  and 
  the 
  rudimentary 
  palpi 
  are 
  

   more 
  distinct 
  than 
  in 
  C 
  h 
  ry 
  sobothris 
  or 
  Dicerca. 
  Maxillse 
  a 
  little 
  slenderer 
  

   than 
  in 
  Dicerca 
  and 
  Ghrysobothris, 
  3-jointed; 
  maxillary 
  lobe 
  much 
  

  

  