﻿FACKARD.] 
  

  

  THE 
  HAIRY 
  POTATO-MAGGOT. 
  

  

  733 
  

  

  single 
  egg 
  in 
  an 
  oblong 
  slit 
  in 
  the 
  stalk 
  about 
  one-eigbtli 
  of 
  an 
  inch 
  long, 
  

   which 
  she 
  has 
  previonsly 
  formed 
  with 
  her 
  beak 
  in 
  the 
  stalk 
  of 
  the 
  potato. 
  

   The 
  grub 
  afterward 
  hatches 
  and 
  bores 
  into 
  the 
  heart 
  of 
  the 
  stalk, 
  work- 
  

   ing 
  downward 
  toward 
  the 
  root, 
  causing 
  the 
  stalk 
  to 
  wilt. 
  When 
  ob- 
  

   served 
  to 
  suddenly 
  die 
  the 
  stalks 
  should 
  be 
  cut 
  down 
  and 
  burned. 
  

  

  Beetle. 
  — 
  Bluisli 
  or 
  ash-gray, 
  with 
  three 
  shining, 
  black, 
  impressed 
  spots 
  at 
  the 
  lower 
  

   edge 
  of 
  the 
  thorax. 
  The 
  grab 
  (larva) 
  when 
  fully 
  grown 
  is 
  a 
  little 
  over 
  one-fourth 
  of 
  

   an 
  inch 
  long, 
  and 
  is 
  soft, 
  whitish, 
  footless, 
  with 
  a 
  scaly 
  head. 
  — 
  (Riley.) 
  

  

  Besides 
  these 
  insects 
  the 
  "potato-worm," 
  or 
  caterpillar 
  of 
  the 
  five- 
  

   spotted 
  hawk-moth, 
  and 
  the 
  caterpillar 
  of 
  the 
  Gortyna 
  nitela, 
  which 
  

   bores 
  in 
  corn, 
  and 
  the 
  helmet-beetle 
  (Co^Jtocycla 
  aurichalcea), 
  which 
  

   usually 
  feeds 
  on 
  the 
  sweet-potato 
  and 
  morning-glory, 
  occasionally 
  prey 
  

   on 
  the 
  potato-leaves. 
  

  

  The 
  clubbed 
  tortoise-beetle 
  {Deloyala 
  clarata) 
  was 
  found 
  in 
  1871 
  by 
  

   Mr. 
  A. 
  G. 
  Smith, 
  of 
  Berlin, 
  Mass., 
  to 
  be 
  feeding 
  on 
  the 
  leaves 
  of 
  the 
  

   potato, 
  " 
  eating 
  indifferently 
  different 
  varieties." 
  

  

  The 
  Hairy 
  Potato-Maggot, 
  B^oma/ow^/fa 
  /wJerosa 
  Curtis? 
  (Fig. 
  13.)— 
  Feeding 
  In 
  

   decaying 
  (?) 
  potatoes 
  and 
  cabbages 
  ; 
  a 
  flat, 
  hairy 
  maggot, 
  which 
  transforms 
  to 
  a 
  fly 
  

   like 
  the 
  common 
  house-fly, 
  but 
  paler 
  and 
  smaller. 
  

  

  A 
  few 
  years 
  ago 
  specimens 
  of 
  a 
  hairy 
  

   jmaggot 
  taken 
  by 
  Mr. 
  O. 
  A. 
  Putnam 
  Au- 
  

   gust 
  15, 
  1875, 
  in 
  defective 
  potatoes, 
  were 
  

   sent 
  to 
  the 
  museum 
  of 
  the 
  Peabody 
  Acad- 
  

   ;emy 
  of 
  Science, 
  at 
  Salem, 
  Mass., 
  and 
  shortly 
  

   after 
  the 
  museum 
  received 
  a 
  number 
  of 
  

   I 
  maggots 
  of 
  the 
  same 
  species 
  found, 
  July 
  

   12, 
  1875, 
  in 
  the 
  Savoy 
  cabbage, 
  by 
  Mr. 
  John 
  

   H. 
  Sears, 
  of 
  Dan 
  vers, 
  Mass. 
  The 
  latter 
  

   jlot 
  consisted 
  of 
  two 
  broods, 
  *. 
  e., 
  of 
  maggots 
  

   fully 
  grown, 
  and 
  others 
  one-quarter 
  grown. 
  

   They 
  are 
  very 
  similar, 
  if 
  not 
  identical, 
  with 
  

   I 
  Ourtis's 
  Homalomyia 
  tuberosa. 
  Our 
  species 
  

   is 
  probably 
  the 
  one 
  referred 
  by 
  Harris 
  to 
  

   i 
  the 
  Anthomyia 
  canieidaris 
  of 
  Europe, 
  and 
  

   is 
  perhaps, 
  as 
  suggested 
  by 
  Baron 
  Osten 
  

   Sacken, 
  H. 
  scalar 
  is. 
  

  

  Fig. 
  13. 
  — 
  Hairy 
  potato-maggot 
  

   (Homalomyia 
  tuberosa?) 
  a, 
  larva; 
  

   &,the 
  same 
  enlarged 
  twice. 
  After 
  

   Curtis. 
  

  

  Description 
  of 
  Ike 
  larva 
  (Fig. 
  13: 
  a, 
  natural 
  size; 
  b, 
  magnified 
  twice). 
  — 
  Head 
  minute, 
  

   fleshy, 
  not 
  seen 
  in 
  the 
  pupa-case. 
  Body 
  flattened, 
  cylindrical, 
  ovate. 
  Prothoracic 
  seg- 
  

   ment 
  flat, 
  square, 
  trapezoidal. 
  On 
  the 
  body 
  are 
  two 
  rows 
  of 
  long, 
  slender 
  dorsal 
  spines 
  

   or 
  hairs, 
  two 
  rows 
  of 
  lateral 
  longer 
  hairs 
  (seen 
  under 
  a 
  high 
  magnifying 
  power 
  to 
  have 
  

   short 
  spiracles), 
  one 
  subdorsal, 
  the 
  other 
  subvential. 
  The 
  last 
  four 
  dorsal 
  are 
  longer 
  

   than 
  those 
  in 
  front. 
  The 
  end 
  of 
  the 
  body 
  forms 
  a 
  flat, 
  smooth 
  declivity, 
  on 
  each 
  side 
  

   of 
  the 
  front 
  edge 
  of 
  which 
  is 
  a 
  thick, 
  stout, 
  short 
  spine 
  (a 
  produced 
  spiracle), 
  much 
  

   thicker 
  than 
  the 
  others, 
  and 
  ending 
  suddenly 
  in 
  four 
  short, 
  blunt 
  spines. 
  Behind 
  these 
  

   two 
  spines, 
  on 
  the 
  side 
  of 
  the 
  declivity, 
  are 
  six 
  hairs, 
  with 
  short, 
  slender 
  respiratory 
  

   hairs 
  on 
  the 
  basal 
  half. 
  Some 
  of 
  the 
  lateral 
  hairs 
  have 
  similar 
  lateral 
  respiratory 
  fila- 
  

   ments, 
  but 
  they 
  are 
  less 
  distinct 
  than 
  on 
  the 
  six 
  terminal 
  hairs. 
  The 
  under 
  side 
  of 
  the 
  

   body 
  is 
  flattened. 
  The 
  spiracles 
  at 
  the 
  base, 
  on 
  each 
  edge 
  of 
  the 
  first 
  segment 
  behind 
  

   the 
  head, 
  have 
  six 
  long, 
  slender 
  respiratory 
  processes. 
  Length, 
  0.27 
  inch. 
  This 
  descrip- 
  

   tion 
  will 
  also 
  apply 
  to 
  the 
  pupa-case. 
  

  

  It 
  is 
  easy 
  to 
  see 
  how 
  maggots 
  like 
  these, 
  which 
  bury 
  themselves 
  in 
  

   cabbages 
  and 
  potatoes, 
  may 
  become 
  swallowed 
  with 
  the 
  food, 
  and 
  if 
  

   the 
  latter 
  is 
  only 
  partially 
  cooked 
  and 
  hastily 
  swallowed, 
  how 
  the 
  living 
  

   worms 
  become 
  conveyed 
  into 
  the 
  stomach, 
  and 
  become 
  so 
  annoying 
  that 
  

   the 
  doctor 
  has 
  to 
  be 
  sent 
  for. 
  The 
  European 
  Homalomyia 
  scalaris, 
  or 
  

   " 
  ladder- 
  maggot," 
  is 
  not 
  unfrequently 
  voided 
  from 
  the 
  bowels 
  of 
  boys 
  

   and 
  adults 
  in 
  both 
  countries. 
  

  

  