A^uJo°u1it'f9i3rm'}   Nature  and  Structure  of  Cochineal.  351 
1848-9,  pp.  342-348.  In  this  article  there  is  also  an  interesting 
note  on  the  Madeira  Nopal  as  well  as  the  cochineal  insects  growing 
on  the  opuntias  in  this  locality.    In  a  line  drawing  in  this  article  of 
Fig.  3. 
Microphotograph  of  cochineal  insect  of  commerce  showing:  numerous  larvae  (/)  each  with 
the  characteristic  beak  or  proboscis  in  the  form  of  two  dense  spiral  coils.  The  mouth  part,  m, 
and  portions  of  the  legs  (/)  of  the  mother  insect  are  also  shown. 
de  Nobrega  there  is  shown  the  stem  of  an  opuntia  on  which  are 
several  broods  of  cochineal.  The  best  illustrations,  however,  show- 
ing the  Nopal  plants  and  cochineal  insects  are  those  given  in  the 
