380 
and  hinder  half  of  the  body  not  visibly  punctulate . 
a8.  Transverse  sulcus  much  weaker,  obsolete  on 
the  3rd  segment  which  in  the  9  is  scarcely 
emarginate  above    ....  rubro-limbatus. 
&8.  Transverse  sulcus  very  strong,  present  on  the 
3rd  segment  which  in  the  Q  is  distinctly  emar- 
ginate  javanicus 
With  the  exception  of  vittatus  and  proboscideus ,  the  species  of  this 
group  here  described,  have  the  following  features  in  common: 
Head  smooth ,  with  a  superior  transverse  crenulate  ridge  and  a  frontal 
sulcus  which  extends  to  a  point  on  a  level  with  the  eyes.  Eyes  large 
acutely  angled  internally  and  separated  by  a  space  which  about  equals 
or  slightly  excels  the  long  diameter  of  the  eye.  Antennae  long  or  short. 
First  segment  moderatly  large  or  narrowed  laterally,  usually  exten- 
ding inferiorly  as  low  as  the  2nd. 
The  rest  of  the  segments  with  the  anterior  half  finely  ridged  trans- 
versely; the  posterior  half  generally  smooth  and  polished  above,  longi- 
tudinally striate  below,  striae  not  extending  up  to  the  pore.  Pore 
small,  situated  behind  the  sulcus.  Sulcus  deep  or  nearly  obsolete  dorsally, 
sinuate  on  a  level  with  the  pore.  Sterna  smooth.  Ventral  grooves  long. 
Anal  ring  usually  produced  above  into  a  distinct  tail  and  below 
often  fused  with  the  triangular  anal  sternite,  although  the  suture 
between  them  may  persist. 
Valves  with  thickened  compressed  margins. 
Legs  smooth  above,  generally  rather  sparsely  hairy  below,  with  a  single 
spine  above  the  terminal  claw  and  two  or  three  spinules  beneath  it. 
Secondary  sexual  characters:  Q  with  2»d  and  3'd  segments  enlarged: 
with  first  segment  larger  laterally  than  in  the  Ç,  with  longer 
antennae  and  legs,  the  latter  with  their  ^  and  5*  segments  furnished 
with  soft  pads  on  the  distal  half  of  the  lower  surface. 
This  group  which  contains  a  large  number  of  Indo-Malayan  species 
may  be  known  by  the  generic  title  of  Thyropygus  with  erythropleu- 
rus  sp.  n.  as  the  type. 
77.  Thyropygus  javanicus,  (Brandt.)  Pl.  XXII,  fig.  16-16°. 
Syn.  Spirostreptus  javanicus,  Brandt,  Recueil  de  mém.  etc.  p.  92 
(1841);  Gervais  Ins.  Apt.  IV,  pp.  167-168(1847). 
