The  skin  is  remarkable  for  its  dense  solidity.  The  head  is
ventral,  the  antennae  (which  are  very  curved)  originating  on
the  front  of  the  prothorax  and  extending  ventrally  as  a  ventral
margin  to  the  edge  of  the  wings.  A  small  prominence  at  the  base
of  the  maxillae.  The  legs  well-developed,  the  antennae  strongly
segmented.  The  wings  very  narrow,  compared  with  the  size  of
the  imaginal  structures,  the  costal  margins  meeting  much  before
the  apex.  The  glazed  eye  indistinct  and  sunk  in  a  depression
near  base  of  antenna.  There  is  a  remarkable  beak  or  cocoon-
opener,  very  like  that  of  a  Cossid  or  Sesiid.  This  beak  is
placed  between  the  antennae,  and  has  a  strengthening  ridge
running  back  on  each  side;  above  the  labrum  is  a  blunt  pro-
jection of  some  prominence,  and  on  each  side  the  lappets,  that  are
jaws,  or  the  jaw -covers  of  the  face;  maxillae  large  in  centre.
