328 
lightly  excavated  in  the  middle-line  above.  Antennae  short  and  thick, 
apical  segment  clavate  and  rounded. 
Nuchal-plate  with  its  surface  not  flat  but  lightly  undulating,  thickly 
punctured  and  hairy;  not  furnished  in  front  of  the  lower  border  with 
either  a  transverse  ridge  or  a  sulcus. 
2nd  dorsal  plate  thickly  and  deeply  punctured  and  hairy,  anterior 
margin  low  but  nearly  vertical,  laterally  furnished  with  a  few  ill-de- 
fined oblique  smooth  keels,  not  marked  by  a  ridge  or  sulcus  in  front; 
the  lamina  very  narrow  in  front  ,  represented  merely  by  the  straight 
edge  of  the  plate,  becoming  gradually  wider  below  and  behind,  its 
margin  evenly  thickened  throughout. 
The  rest  of  the  tergites  furnished  in  front  with  numerous  rounded 
granules  or  small  tubercles,  and  behind  with  deep  punctures. 
Anal  tergite  convex  from  side  to  side,  lightly  saddle-shaped  from 
above  downwards,  its  inferior  portion  turned  inwards;  without  mar- 
ginal notch  and  without  inner  ridge. 
Legs  hairy,  tarsal  segments  not  dis  tally  attenuated,  furnished  with 
a  single  spine  above  the  claw  and  several  spines  beneath. 
In  the  first  and  second  pairs  of  legs  the  terminal  claw  is  of  enormous 
size,  being  as  long  as  the  tarsal  segment  and  as  thick  as  it  at  its 
proximal  end;  no  spines  above  or  below  it. 
The  tooth  of  the  mandible  also  enormously  enlarged  and  elongate, 
obviously  corresponding  with  the  enlarged  claws  of  the  anterior  two 
pairs  of  legs. 
Copalatory  feet  —  1st  pair  with  movable  dactylus  long,  stout,  com- 
posed of  two  segments  whereof  the  proximal  is  very  much  the  larg- 
est and  bears  at  its  distal  end  a  tooth-like  prominence;  immovable 
slender  when  seen  from  the  side,  very  short,  considerably  shorter 
than  the  proximal  segment  of  the  movable  dactylus;  2nd  pair  with 
movable  dactylus  composed  of  two  segments,  whereof  the  distal  is 
very  small  but  of  the  same  width  as  the  distal  end  of  the  proximal 
segment,  which  is  thicker  at  the  base;  immovable  dactylus  about  as 
long  as  the  movable ,  gently  curved ,  becoming  gradually  more  slender 
from  base  to  apex,  neither  spatulate  nor  blade  like. 
Length  15  mm.,  width  7.5  mm. 
This  species  is  of  very  great  interest.  The  form  of  the  copulatory 
feet  and  of  the  tarsal  segments  of  the  legs  shows  that  it  is  related  to 
