94  Plants  Used  as  Insecticides.       { AYchl°uZy^jgi^' 
them  in  fly-time,  prevents  the  annoyance  of  those  insects.  (Wil- 
liams, Trans.  Am.  Med.  Assoc.,  Vol.  2,  1849,  P-  92o.) 
All  the  species  serve  as  insecticides,    (von  Mueller.) 
Hiptage  Madablota  Gaertn.  Malpighiacece. 
An  insecticide.    (Greshoff,  1913.) 
Hydnocarpus  anthelmintica  Pierre.  Bixacew. 
The  seed  is  used  as  an  insecticide.    (Greshoff,  1913.) 
Indigofera  tinctoria  L.  Fabacece.  Synonym :  Indigofera  in- 
dica  Lam.,  not  Mill.  East  Indian  Indigo  Plant.  Tropical  coun- 
tries. 
In  Jamaica  it  is  employed  to  destroy  vermin.  (Porcher.) 
The  seeds  yield  a  tincture  which  is  used  to  destroy  lice.  (Phar- 
macogr.  Ind.,  quoted  by  Greshoff.) 
Inula  Pulicaria  L.  Composite?. 
Flowers  of  this  were  entirely  inactive  against  flies.  (Kalbruner.) 
Inula  squarrosa  (L.)  Bernh.    Synonym:  Conyza  squarrosa  L., 
Inula  Conyza  DC.    Plowman's  Spikenard.  Europe. 
Herb  diuretic,  emmenagogue,  insecticide.  (Lyons.) 
Juglans  nigra  L.  I  uglandacece .  Black  Walnut,  American  Wal- 
nut.   Ontario  and  Eastern  U.  S. 
Walnut  leaves  soaked  in  water  for  some  hours,  then  boiled  and 
applied  to  the  skins  of  horses  and  other  animals,  will  prevent  their 
being  bitten  or  worried  by  flies.  (Porcher.) 
Riley  reports  on  the  action  of  the  alcoholic  extract  and  decoction 
on  cotton  worms  (Aletia)  as  follows :  "  A  substance  which,  espe- 
cially in  the  form  of  decoction,  deserves  further  attention.  It  has 
no  effect  on  the  worms  upon  contact,  but  renders  the  leaves  de- 
cidedly distasteful  to  them.  On  the  second  day  after  application  the 
leaves  which  had  received  a  large  amount  of  the  decoction  remained 
fully  intact;  the  worms  having  removed  to  the  lower  branches  and 
to  those  portions  of  the  plants  which  were  not,  or  but  little,  treated 
with  the  decoction.  Several  worms  kept  in  captivity  without  food 
except  leaves  drenched  with  this  decoction  finally  fed  upon  them  and 
successfully  changed  to  pupae.  The  decoction  stains  the  leaves  dark 
brown,  but  apparently  without  injuring  them." 
Juniperus  horizontalis  Moench.    Pinacece.     Synonym:  Sabina 
