Comparing  the  British  Amorphid  with  the  Sphingid  species,  Bacot
gives  (Ent,  Rec.y  vi.,  pp.  178  et  seq,)  the  following  interesting  details  :
"  In  their  earlier  stadia,  the  larvae  of  the  Amorphids  and  of  Sphingids
(Sphinx  Itgustn)  have  many  characters  in  common,  e.g,,  S.  ligusiri^
in  its  first  skin,  has  forked  hairs,  though  these  are  black,  and  are
thinly  scattered  compared  with  the  *  door-mat '  appearance  which  is
characteristic  of  the  Amorphids.     The  shape  of  the  head  is  similar
to  that  of  Mimas  tiliae  in  its  earlier  stages,  and  there  are  other  minor
points  of  resemblance.     In  the  imagines,  however,  the  only  points  of
resemblance  that  I  can  see  are  that  the  head  and  eyes  of  S,  ligustri
are  small,  and  that  the  antennae  are  somewhat  similar  in  stucture.
On  the  other  hand,  the  resting-position  is  quite  different,  S,  ligusfn\
like  Manduca  atropoSy  Agrius  convolvuli^  &c.,  resting  with  the  fore-
wings  sloped  over  the  back  and  the  hind  wings  folded  underneath  them.
The  resting-position  of  Eumorpha  appears,  at  first  sight,  to  be  some-
what similar  to  that  of  the  Amorphids,  but  the  pupae  are  very  different.
Whatever  may  be  the  right  place  for  the  Amorphids,  I  can  see  no
reason  for  putting  Manduca  atropos  next  to  them,  for   I  think  that,
without  question,  S,  ligustri  is  a  nearer  relation,  and  it  is  probably  a
link  between  the  two.     Turning  to  individual  differences,  the  hind  tibiae
of  M,  tiliae   have   four   spurs,  while  those  of  the   other  Amorphid
species,   A,  populi  and   S,   ocellata,   have   only   two.       I   find   that
Manduca  atropos^   Sphinx  ligustri^    Eumorpha  elpenor  and    Hemaris
fuciformis  also  have  four  spurs  to  their  tibiae.      The  males  of  M.
