381 
Syn.  Spirostreptus  collaris,  Porat,  Bin.  Svenska  Vet.  Ak.  Handl. 
IV,  n°.  7,  p.  43  (1876). 
»         javanicus,  Porat,  Ann.  Sog.  Ent.  Belg.  XXXII, 
pp.  207-210  (1889). 
Java:  Buitenzorg. 
A  number  of  examples  were  obtained  varying  in  size  from  about 
120  mm.  to  40  mm.  In  the  young  and  half-grown  examples  the  pos- 
terior terminal  somites  are  relatively  larger  thau  in  the  adults.  More- 
over the  caudal  process  does  not  project  beyond  the  anal  valves  in 
examples  of  about  40  mm.,  while  in  those  of  about  70  or  75  mm., 
it  is  shorter  than  in  the  adults. 
78.  Thyropygus  xanthonotus ,  sp.  n. 
Java:  Buitenzorg.  A  single  female  specimen. 
9.  Closely  resembling  the  preceding  but  differing  in  colour,  there 
being  on  the  posterior  half  of  each  segment  a  median  dorsal  yellow 
spot,  which  anteriorly  unites  with  a  wide,  more  or  less  triangular, 
rich  yellow  band  occupying  the  whole  of  the  upper  surface  of  the 
anterior  portion  of  each  somite. 
Moreover  the  lateral  extension  of  the  first  tergite  has  its  anterior 
margin  less  thickened  and  the  angle  consequently  less  produced,  and 
the  striae  finer. 
Length  about  98  mm. 
79.  Thyropygus  rubro-limbatus ,  sp.  n.  Pl.  XXII,  fig.  17- 17a. 
Sumatra:  Padang.  A  single  male  example. 
Nearly  allied  to  javanicus. 
Colour;  head  fuscous  above,  passing  beneath  into  deep  ferruginous, 
segments  piceo-olivaceous ,  the  1*  with  red  margins,  and  the  rest  with 
red  along  the  posterior  border,  the  caudal  process  and  borders  of  the 
valves  also  red.  Legs  and  antennae  clear  pale  yellow. 
Head:  with  striate  area  conspicuous,  distance  between  the  eyes 
rather  greater  than  a  diameter;  antennœ  just  surpassing  the  collum 
when  extended  laterally.  1*  tergite  or  collum  extending  inferiorly  as 
low  as  the  2«a;  its  posterior  border  lightly  emarginate  above  the 
posterior  angle,  close  to  which  there  are  two  or  three  deep  abbrevia- 
ted sulci,  anterior  angle  obtusely  convex ,  anterior  border  nearly  straight. 
On  the  rest  of  the  segments  the  transverse  striae  of  the  anterior 
half  extend  from  the  sternum  to  the  summit,  but  do  not  reach  poste- 
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