﻿REPORT 
  OF 
  THE 
  STATE 
  ENTOMOLOGIST 
  245 
  

  

  *' 
  From 
  the 
  present 
  appearance 
  of 
  the 
  elms 
  throughout 
  the 
  towns 
  of 
  

   Central 
  Illinois, 
  where 
  I 
  have 
  had 
  an 
  opportunity 
  to 
  examine 
  their 
  con- 
  

   dition, 
  and 
  from 
  the 
  rapid 
  progress 
  which 
  this 
  pest 
  has 
  made 
  among 
  them 
  

   during 
  the 
  last 
  two 
  or 
  three 
  years, 
  it 
  seems 
  extremely 
  likely 
  that 
  it 
  will 
  

   totally 
  exterminate 
  the 
  trees 
  unless 
  it 
  be 
  promptly 
  arrested 
  by 
  general 
  

   action.'' 
  A 
  serious 
  attack 
  is 
  recorded 
  upon 
  the 
  elms 
  at 
  Frankfort, 
  Ky., 
  

   in 
  1892, 
  when 
  several 
  were 
  killed 
  and 
  a 
  number 
  badly 
  injured. 
  The 
  

   insect 
  has 
  also 
  been 
  very 
  destructive 
  to 
  elms 
  in 
  Albany 
  and 
  in 
  Glovers- 
  

   ville, 
  N. 
  Y. 
  It 
  does 
  not 
  appear 
  to 
  be 
  so 
  injurious 
  in 
  Canada 
  as 
  in 
  the 
  

   United 
  States. 
  It 
  has 
  been 
  found 
  infesting 
  a 
  dead 
  maple 
  by 
  Mr. 
  

  

  Harrington. 
  

  

  Description 
  of 
  the 
  Insect. 
  

  

  The 
  beetle 
  is 
  an 
  innocent 
  appearing 
  slate-colored 
  insect 
  with 
  dull 
  

   orange 
  markings 
  as 
  follows 
  : 
  a 
  curved 
  line 
  behind 
  each 
  eye, 
  a 
  line 
  on 
  each 
  

   side 
  of 
  the 
  thorax, 
  and 
  margined 
  wing-covers 
  with 
  three 
  nearly 
  equidistant 
  

   points 
  extending 
  from 
  the 
  border. 
  They 
  vary 
  in 
  length 
  from 
  about 
  one- 
  

   third 
  to 
  one-half 
  an 
  inch. 
  The 
  females 
  are 
  considerably 
  stouter 
  and 
  

   with 
  shorter 
  antennae 
  than 
  the 
  males 
  (PI. 
  VII, 
  fig. 
  2). 
  

  

  The 
  borers 
  (the 
  larvae 
  of 
  the 
  beetles), 
  are 
  similar 
  in 
  form 
  and 
  general 
  

   appearance 
  to 
  the 
  notorious 
  round-headed 
  borer 
  of 
  the 
  apple, 
  belong- 
  

   ing, 
  indeed, 
  to 
  the 
  same 
  genus. 
  They 
  rarely 
  exceed 
  three-fourths 
  of 
  an 
  

   inch 
  in 
  length, 
  are 
  destitute 
  of 
  feet, 
  and 
  have 
  the 
  usual 
  enlargement 
  of 
  

   the 
  first 
  segment 
  of 
  the 
  body 
  immediately 
  behind 
  the 
  head. 
  (Forbes.) 
  

  

  The 
  larva 
  is 
  white, 
  subcylindrical, 
  a 
  little 
  flattened, 
  with 
  the 
  lateral 
  

   fold 
  of 
  the 
  body 
  rather 
  prominent; 
  end 
  of 
  the 
  body 
  flattened, 
  obtuse, 
  

   and 
  nearly 
  as 
  wide 
  at 
  the 
  end 
  as 
  at 
  the 
  first 
  abdominal 
  ring. 
  The 
  head 
  

   is 
  one-half 
  as 
  wide 
  as 
  the 
  prothoracic 
  ring, 
  bemg 
  rather 
  large. 
  The 
  pro- 
  

   thoracic 
  segment, 
  or 
  that 
  next 
  to 
  the 
  head, 
  is 
  transversely 
  oblong, 
  being 
  

   about 
  twice 
  as 
  broad 
  as 
  long 
  ; 
  there 
  is 
  a 
  pale 
  dorsal 
  corneous 
  transversely 
  

   oblong 
  shield, 
  being 
  about 
  two-thirds 
  as 
  long 
  as 
  wide, 
  and 
  nearly 
  as 
  long 
  

   as 
  the 
  four 
  succeeding 
  segments; 
  this 
  plate 
  is 
  smooth, 
  except 
  on 
  the 
  pos- 
  

   terior 
  half, 
  which 
  is 
  rough, 
  with 
  the 
  front 
  edge 
  irregular 
  and 
  not 
  extend- 
  

   ing 
  far 
  down 
  the 
  sides. 
  Fine 
  hairs 
  arise 
  from 
  the 
  front 
  edge 
  and 
  side 
  of 
  

   the 
  plate, 
  and 
  similar 
  hairs 
  are 
  scattered 
  over 
  the 
  body 
  and 
  especially 
  

   around 
  the 
  end. 
  On 
  the 
  upper 
  side 
  of 
  each 
  segment 
  is 
  a 
  transversely 
  

   oblong 
  ovate 
  roughened 
  area 
  with 
  the 
  front 
  edge 
  sHghUy 
  convex, 
  and 
  

   behind 
  slightly 
  arcuate 
  On 
  the 
  under 
  side 
  of 
  each 
  segment 
  are 
  similar 
  

   rough 
  horny 
  plates, 
  but 
  arcuate 
  in 
  front, 
  with 
  the 
  hinder 
  edge 
  straight. 
  

   (Packard.) 
  

  

  The 
  larva 
  differs 
  from 
  the 
  allied 
  linden 
  borer, 
  Sapen/a 
  vestita 
  Say, 
  in 
  

   its 
  shorter, 
  broader, 
  and 
  more 
  hairy 
  body, 
  and 
  having 
  the 
  tip 
  of 
  the 
  abdo- 
  

   men 
  hairy 
  and 
  more 
  depressed. 
  The 
  prothoracic 
  segment 
  is 
  broader 
  and 
  

   flatter, 
  and 
  the 
  rough 
  portions 
  of 
  the 
  dorsal 
  plates 
  are 
  larger 
  and 
  not 
  so 
  

   transversely 
  ovate. 
  The 
  mandibles 
  are 
  much 
  longer 
  and 
  more 
  slender, 
  

   and 
  the 
  antennae 
  much 
  smaller 
  than 
  in 
  S. 
  vestita. 
  

  

  