375 
Colour  a  dull  brown  above;  head,  legs  and  sternal  surface  ochra- 
ceous;  antennso  nearly  white. 
Head  finely  and  very  closely  granular  above ,  smooth  below.  Antennœ 
short,  clavate  the  third  segment  long  and  cylindrical,  the  fifth,  sixth 
and  seventh  enlarged,  with  a  distinct,  external  protuberance,  the  fifth  and 
sixth  subequal  in  size ,  the  seventh  smaller  but  as  large  as  the  fourth. 
The  first  tergite  with  its  upper  surface  depressed  in  front,  convex 
behind,  very  nearly  as  wide  as  the  second  and  twice  as  wide  as  the 
head  which  it  largely  covers  in  front ,  its  anterior  border  not  toothed , 
evenly  arched  from  the  posterior  angles  of  the  keels;  the  posterior 
borders  of  the  keels  directed  obliquely  outwards  and  forwards  not 
toothed,  the  upper  surface  covered  with  low  tubercles,  mixed  with 
short  hairs.  The  keels  of  the  rest  of  the  somites  somewhat  similar 
in  form,  much  wider  than  long,  not  or  scarcely  narrowed  distally, 
with  the  anterior  and  posterior  borders  subparallel  ;  those  of  the  second 
and  third  somites  directed  very  slightly  forwards,  the  others  becoming 
gradually  but  only  slightly  directed  backwards  towards  the  hinder 
end  of  the  body,  nearly  horizontal;  the  anterior  border  without  a 
basal  shoulder,  very  lightly  convex,  unarmed;  the  anterior  angle 
convex;  the  lateral  border  quadridentate  or  lobate;  the  posterior  angle 
acute  and  slightly  produced;  the  posterior  border  lightly  concave  and 
furnished  with  low  tuberculiform  teeth.  The  dorsal  surface  very  convex, 
and  covered  with  about  five  rows  of  tubercles,  the  upper  surface  of 
the  keels  tubercular  like  the  tergites,  but  lees  conspicuously  so,  fur- 
nished laterally  with  grooves,  which  radiate  to  the  lateral  and  postero- 
lateral border;  lower  surface  of  the  keels  strongly  and  sub-radially 
sulcate.  Lateral  surface  of  the  somites  thickly  hairy.  Caudal  process 
triangular  pointed,  closely  granular  or  sub-tubercular,  projecting  very 
slightly  beyond  the  apices  of  the  keels  of  the  preceding  somite.  Anal 
sternita  bituberculate.  Sterna  sulcate  and  narrow. 
cT.  With  the  keels  more  raised  than  in  the  ç,  the  body,  thus 
looking  flatter.  Legs  of  the  6th  somite  not  more  widely  separated 
than  the  rest  ;  those  of  the  7th  a  little  more  widely. 
The  copulatory  feet  small,  contained  completely  in  a  cavity  and 
evidently  protrusible  but  their  structure  is  so  complicated  as  to  be 
practically  indescribable. 
Length  16,  width  4  mm. 
