﻿252 
  REPORT 
  UNITED 
  STATES 
  ENTOMOLOGICAL 
  COMMISSION. 
  

  

  as 
  wide 
  as 
  the 
  9th. 
  A 
  pair 
  of 
  irregular 
  rather 
  long 
  patches 
  on 
  each 
  

   abdominal 
  segment 
  above, 
  and 
  a 
  pair 
  of 
  curvilinear 
  impressed 
  lines 
  

   beneath. 
  

  

  One 
  pair 
  of 
  mesothoracic 
  and 
  eight 
  pairs 
  of 
  abdominal 
  spiracles. 
  

  

  Head 
  a 
  little 
  narrower 
  than 
  the 
  thoracic 
  disk. 
  Olypeus 
  corneous, 
  

   square 
  in 
  front, 
  very 
  short 
  and 
  broad. 
  Labrum 
  square, 
  a 
  little 
  longer 
  

   than 
  wide, 
  front 
  edge 
  moderately 
  rounded, 
  densely 
  hirsute. 
  Antennae 
  

   3-jointed 
  j 
  1st 
  joint 
  short, 
  membranous, 
  2d 
  considerably 
  narrower, 
  3d 
  

   minute, 
  rounded 
  at 
  tip, 
  considerably 
  slenderer 
  than 
  2d. 
  Mandibles 
  

   entirely 
  black. 
  Maxillary 
  lobe^^^^ 
  short, 
  projecting 
  slightly 
  beyond 
  the 
  

   edge 
  of 
  labium. 
  Maxillary 
  palpus 
  2-jointed, 
  2d 
  joint 
  not 
  so 
  long 
  as 
  the 
  

   1st 
  is 
  wide, 
  one-third 
  as 
  thick, 
  and 
  extending 
  a 
  little 
  beyond 
  the 
  max- 
  

   illary 
  lobe. 
  Labium 
  entire, 
  the 
  front 
  e^ge 
  not 
  being 
  excavated. 
  

  

  Length, 
  22°^°^ 
  5 
  breadth 
  of 
  prothoracic 
  segment, 
  7"^™ 
  5 
  length, 
  4"^™; 
  width 
  

   of 
  6th 
  abdominal 
  segment, 
  3™"^. 
  

  

  Ftipa. 
  Body 
  flattened, 
  and 
  of 
  the 
  general 
  shape 
  of 
  the 
  imago. 
  The 
  

   antennae 
  seen 
  from 
  above 
  extend 
  to 
  a 
  little 
  behind 
  the 
  outer 
  hinder 
  an- 
  

   gle 
  of 
  the 
  prothorax. 
  The 
  elytra 
  reach 
  to 
  the 
  middle 
  of 
  the 
  4th 
  ab- 
  

   dominal 
  segment. 
  The 
  wings 
  extend 
  as 
  far 
  as 
  the 
  hinder 
  edge 
  of 
  the 
  

   same 
  segment. 
  The 
  3d 
  pair 
  of 
  tarsi 
  reach 
  to 
  near 
  the 
  middle 
  of 
  the 
  

   6th 
  abdominal 
  segment. 
  Six 
  pairs 
  of 
  abdominal 
  spiracles. 
  Length, 
  

   15mm. 
  breadth, 
  7°»™. 
  

  

  In 
  transforming, 
  the 
  eyes, 
  the 
  front 
  of 
  the 
  head, 
  the 
  prothorax, 
  the 
  

   femora 
  and 
  tibia 
  and 
  portions 
  of 
  the 
  sternum 
  and 
  under 
  side 
  of 
  the 
  

   abdominal 
  segments, 
  turn 
  dark 
  first. 
  

  

  Ohalcophora, 
  probably 
  0. 
  YiRaiNiCA. 
  PI. 
  YI, 
  fig. 
  1. 
  

  

  Compared 
  with 
  Dicerca 
  the 
  head 
  is 
  much 
  larger 
  and 
  better 
  developed, 
  

   while 
  the 
  prothorax 
  is 
  of 
  the 
  same 
  size, 
  and 
  the 
  abdomen 
  is 
  fully 
  as 
  

   thick, 
  but 
  rather 
  longer. 
  Prothorax 
  and 
  the 
  V-shaped 
  mark 
  one-half 
  

   narrower 
  than 
  ip 
  Chrysohothris 
  femorata, 
  and 
  with 
  no 
  markings 
  around 
  

   the 
  apex, 
  as 
  in 
  Dicerca. 
  The 
  prothoracic 
  disk 
  has 
  very 
  large, 
  coarse, 
  

   transverse, 
  raised 
  linear 
  chitinous 
  points, 
  which 
  are 
  more 
  or 
  less 
  con- 
  

   fluent, 
  forming 
  irregular 
  transverse 
  wavy 
  ridges. 
  The 
  disk 
  on 
  the 
  

   under 
  side 
  has 
  similar 
  markings, 
  and 
  a 
  single 
  narrow 
  deeply 
  impressed 
  

   median 
  line, 
  which 
  extends 
  from 
  the 
  front 
  to 
  the 
  hinder 
  edge. 
  

  

  Ko 
  roughened 
  area 
  on 
  the 
  succeeding 
  segnients, 
  but 
  on 
  the 
  mesotho- 
  

   racic 
  are 
  two 
  remote 
  converging 
  curved 
  lines, 
  and 
  on 
  the 
  metathoracic 
  

   segment 
  are 
  similar 
  lines, 
  which 
  extend 
  nearer 
  the 
  front 
  edge; 
  the 
  

   curved 
  lines 
  inclose 
  a 
  subtrapezoidal 
  space. 
  

  

  Antenuse 
  large 
  and 
  well 
  developed, 
  compared 
  with 
  those 
  of 
  Dicerca 
  

   and 
  Chrysobothris 
  ; 
  3-jointed 
  5 
  the 
  basal 
  joint 
  membranous, 
  3d 
  joint 
  

   nearly 
  as 
  long 
  as 
  the 
  2d, 
  and 
  blunt 
  at 
  tip. 
  Labrum 
  rounded 
  on 
  the 
  

   edge, 
  fuller 
  than 
  in 
  Dicerca. 
  Maxilla 
  large 
  and 
  well 
  developed; 
  maxil- 
  

  

  "0 
  What 
  is 
  here 
  called 
  maxillary 
  lobe 
  corresponds 
  to 
  the 
  mala 
  interior 
  of 
  Schiodte, 
  De 
  Metamorphosi 
  

   Elentheratorum 
  Observationes. 
  Naturhi^orisk 
  Tidsskrift, 
  3d 
  ser., 
  vol. 
  1. 
  

  

  