﻿728 
  EEPOET 
  UNITED 
  STATES 
  GEOLOGICAL 
  SURVEY. 
  

  

  Leptinotarsa 
  juncta 
  (Germar) 
  represents 
  D. 
  10-lineata 
  in 
  the 
  Northern 
  

   and 
  Western 
  States. 
  It 
  may 
  be 
  easily 
  confounded 
  with 
  the 
  latter, 
  but 
  

   differs 
  from 
  it 
  in 
  the 
  third 
  and 
  fourth 
  lines 
  in 
  each 
  wing-cover 
  (count- 
  

   ii>g 
  from 
  the 
  inner 
  edge 
  of 
  the 
  elytron), 
  being 
  united 
  to 
  form 
  a 
  common 
  

   band, 
  and 
  the 
  legs 
  are 
  entirely 
  pale 
  yellow, 
  with 
  a 
  dark 
  spot 
  on 
  the 
  

   thighs 
  (femora). 
  The 
  larva 
  has 
  a 
  lighter-colored 
  head, 
  and 
  but 
  a 
  single 
  

   row 
  of 
  lateral 
  dark 
  spots. 
  It 
  feeds 
  on 
  the 
  wild 
  potato, 
  not 
  eating 
  the 
  

   cultivated 
  species. 
  Though 
  first 
  collected 
  in 
  Georgia, 
  it 
  partially 
  in- 
  

   habits 
  all 
  the 
  Southern 
  States. 
  

  

  Eemedies. 
  — 
  The 
  surest 
  and 
  safest 
  remedy 
  is 
  hand-picking. 
  As 
  soon 
  

   as 
  the 
  eggs 
  are 
  laid 
  they 
  should 
  be 
  looked 
  for 
  on 
  the 
  under 
  side 
  of 
  the 
  

   leaf 
  and 
  the 
  leaf 
  torn 
  off 
  and 
  burned. 
  Afterward 
  the 
  grubs 
  and 
  bee- 
  

   tles 
  should 
  be 
  picked 
  off. 
  The 
  following 
  extract 
  from 
  a 
  correspondent 
  

   of 
  the 
  New 
  York 
  Tribune 
  shows 
  the 
  efficacy 
  of 
  this 
  remedy 
  : 
  

  

  From 
  June 
  7 
  to 
  August 
  17 
  I 
  have 
  caught 
  aud 
  killed, 
  by 
  actual 
  counting, 
  over 
  eight- 
  

   een 
  thousand 
  (18,802) 
  "hard 
  shells," 
  without 
  reckoning 
  the 
  eggs 
  and 
  young 
  ones, 
  ou 
  

   less 
  than 
  a 
  quarter 
  acre 
  of 
  potatoes, 
  so 
  that 
  not 
  a 
  vine 
  has 
  lost 
  its 
  leaves. 
  The 
  bugs 
  

   have 
  stripped 
  the 
  neighboring 
  patches, 
  and 
  now 
  come 
  swarming 
  on 
  mine. 
  My 
  neigh- 
  

   bors 
  Paris-greened, 
  scalded, 
  mashed, 
  and 
  burned 
  bugs 
  till 
  the 
  vines 
  had 
  blossomed, 
  

   then 
  left 
  them 
  live, 
  grow 
  fat, 
  and 
  migrate. 
  Would 
  it 
  be 
  feasible 
  to 
  fine 
  the 
  negligent 
  

   bug-catching 
  farmers 
  next 
  year 
  and 
  offer 
  medals 
  to 
  the 
  diligent 
  ? 
  

  

  While 
  hand-picking 
  should 
  be 
  practiced 
  and 
  perhaps 
  State 
  bounties 
  

   paid 
  for 
  the 
  eggs, 
  grubs, 
  and 
  beetles, 
  prizes 
  might 
  be 
  offered 
  by 
  agri- 
  

   cultural 
  societies 
  for 
  the 
  largest 
  collections. 
  Co-operation 
  among 
  farm- 
  

   ers 
  and 
  others 
  should 
  also 
  be 
  urged, 
  even 
  if 
  legislation 
  should 
  have 
  to 
  

   be 
  resorted 
  to. 
  President 
  P. 
  A. 
  Chadbourne, 
  of 
  Williams 
  College, 
  ad- 
  

   vocates 
  higher 
  culture. 
  " 
  Since," 
  he 
  has 
  remarked, 
  " 
  it 
  costs 
  as 
  much 
  

   to 
  protect 
  an 
  acre 
  of 
  potatoes 
  yielding 
  twenty 
  bushels 
  as 
  one 
  yielding 
  

   one 
  hundred 
  bushels, 
  less 
  land 
  should 
  be 
  planted 
  and 
  more 
  highly 
  cul- 
  

   tivated, 
  as 
  in 
  soil 
  properly 
  tilled 
  it 
  would 
  perhaps 
  not 
  cost 
  more 
  than 
  5 
  

   cents 
  a 
  bushel 
  to 
  i)rotect 
  the 
  potatoes." 
  The 
  aid 
  of 
  fowl 
  should 
  also 
  be 
  

   invoked, 
  as 
  chickens 
  freely 
  feed 
  on 
  the 
  grubs. 
  

  

  In 
  the 
  Western 
  States 
  the 
  use 
  of 
  Paris 
  green 
  is 
  advocated. 
  This 
  is 
  a 
  

   preparation 
  of 
  arsenic, 
  and 
  is 
  deadly 
  poison. 
  If 
  used 
  at 
  all 
  in 
  the 
  

   thickly-settled 
  Eastern 
  States, 
  it 
  should 
  be 
  handled 
  with 
  extreme 
  cau- 
  

   tion, 
  and 
  only 
  by 
  careful 
  persons, 
  and 
  in 
  gardens 
  and 
  farms 
  where 
  no 
  

   children 
  are 
  about. 
  One 
  part 
  of 
  Paris 
  green 
  may 
  be 
  mixed 
  with 
  about 
  

   twenty 
  of 
  cheap 
  flour 
  and 
  dusted 
  over 
  the 
  vines 
  early 
  in 
  the 
  morning 
  while 
  

   the 
  dew 
  is 
  on 
  the 
  leaves. 
  The 
  simplest 
  way 
  is 
  to 
  sift 
  the 
  flour 
  from 
  a 
  

   fine 
  muslin 
  bag 
  attached 
  to 
  a 
  pole 
  or 
  from 
  a 
  dredging-box. 
  Although 
  

   Paris 
  green 
  is 
  freely 
  used 
  in 
  the 
  West, 
  I 
  would 
  not 
  advocate 
  its 
  use 
  in 
  

   New 
  England 
  on 
  small 
  farms 
  near 
  houses 
  and 
  in 
  the 
  vicinity 
  of 
  large 
  

   towns. 
  Mr. 
  John 
  H. 
  Sears 
  tells 
  me 
  that 
  several 
  valuable 
  horses 
  and 
  

   cows 
  have 
  to 
  his 
  knowledge 
  died 
  from 
  this 
  poison. 
  Human 
  life 
  is 
  threat- 
  

   ened, 
  as 
  the 
  powder 
  blows 
  about, 
  and 
  the 
  risk 
  of 
  poisoning 
  is 
  too 
  great 
  

   to 
  be 
  lightly 
  taken. 
  

  

  Various 
  machines 
  have 
  been 
  devised 
  for 
  use 
  on 
  large 
  farms, 
  and 
  liquid 
  

   preparations 
  and 
  patent 
  sprinklers 
  manufactured 
  for 
  the 
  purpose. 
  Those 
  

  

  Both 
  L 
  .10-lineata 
  and 
  jinwta, 
  the 
  latter 
  inhabiting 
  the 
  Southern 
  States 
  aud 
  originally 
  

   representing 
  10-lineata 
  of 
  the 
  eastern 
  slope 
  of 
  the 
  Rocky 
  Mountain 
  Plateau, 
  are 
  repre- 
  

   sented 
  in 
  Mexico, 
  Costa 
  Rica, 
  Bogota, 
  and 
  Bolivia 
  by 
  L. 
  11-lineata 
  Chevr., 
  in 
  which 
  

   the 
  head 
  is 
  black 
  and 
  the 
  body 
  darker 
  yellow, 
  but 
  the 
  elytra 
  striped 
  in 
  much 
  the 
  same 
  

   way, 
  while 
  it 
  is 
  a 
  little 
  smaller. 
  Regarding 
  the 
  generic 
  name 
  of 
  the 
  10-n?ieato, 
  Dr. 
  

   Horn 
  writes 
  mo 
  " 
  there 
  is 
  some 
  difficulty, 
  but 
  I 
  think 
  all 
  will 
  finally 
  settle 
  down 
  to 
  

   the 
  n&me 
  LejHinoiarsa 
  decemlincata." 
  M. 
  A. 
  Preudhomme 
  de 
  Borre, 
  in 
  his 
  writings 
  ou 
  

   this 
  insect, 
  calls 
  it 
  Leptinotarsa 
  decemUneata, 
  and 
  says 
  that 
  it 
  has 
  been 
  improperly 
  re 
  

   erred 
  to 
  Doryphora. 
  

  

  