﻿NO. 
  1954. 
  XEW 
  ISOPODS 
  FROM 
  COSTA 
  RICA— 
  RICHARDSON. 
  339 
  

  

  abdominal 
  segment. 
  The 
  branches 
  are 
  styUform, 
  the 
  inner 
  being 
  

   the 
  shorter 
  and 
  about 
  equal 
  in 
  length 
  to 
  the 
  terminal 
  abdominal 
  

   segment; 
  the 
  outer 
  branch 
  is 
  about 
  one 
  and 
  a 
  third 
  times 
  as 
  long 
  

   as 
  the 
  inner. 
  

  

  About 
  1 
  1 
  specimens 
  were 
  collected 
  at 
  Estrella, 
  at 
  an 
  altitude 
  of 
  

   2,000 
  meters, 
  by 
  Mr. 
  Picado. 
  

  

  Locality 
  7. 
  — 
  One 
  specimen 
  at 
  La 
  Mica, 
  in 
  the 
  mountains 
  south- 
  

   west 
  of 
  Orose. 
  Collected 
  by 
  Mr. 
  Picado. 
  

  

  Locality 
  2. 
  — 
  Fourteen 
  specimens 
  at 
  La 
  Estrella, 
  in 
  the 
  Bromehas, 
  

   several 
  meters 
  from 
  the 
  ground. 
  Collected 
  by 
  Mr. 
  Picado. 
  

  

  Locality 
  6. 
  — 
  About 
  16 
  specimens 
  at 
  La 
  Mica, 
  in 
  the 
  mountains 
  

   southwest 
  of 
  Orose. 
  Collected 
  by 
  Mr. 
  Picado. 
  

  

  Locality 
  4- 
  — 
  ^About 
  30 
  specimens 
  at 
  Pitahaya 
  (south 
  of 
  Cartago). 
  

   Collected 
  by 
  Mr. 
  Picado. 
  

  

  In 
  color 
  and 
  color 
  markings 
  the 
  new 
  species 
  is 
  similar 
  to 
  Parcel- 
  

   lionides 
  pruinosus 
  (Brandt). 
  

  

  Type.— 
  C&t. 
  No. 
  43771, 
  U.S.N.M. 
  

  

  PmLOSCIA 
  MUSCORUM 
  (Scopoli). 
  

  

  Locality 
  3. 
  — 
  La 
  Pitahaya 
  (south 
  of 
  Cartago). 
  (Color 
  pattern 
  

   typical.) 
  Collected 
  by 
  Mr. 
  Picado. 
  

  

  Locality 
  ^.— 
  La 
  Estrella, 
  in 
  Bromelias, 
  several 
  meters 
  from 
  the 
  

   ground. 
  Collected 
  by 
  Mr. 
  Picado. 
  The 
  color 
  pattern 
  is 
  somewhat 
  

   different 
  in 
  these 
  specimens, 
  there 
  being 
  a 
  double 
  series 
  of 
  light 
  

   patches 
  on 
  each' 
  side 
  of 
  the 
  mesosome, 
  one 
  series 
  at 
  the 
  base 
  of 
  the 
  

   side 
  plates 
  and 
  the 
  other 
  orfthe 
  outer 
  side 
  of 
  the 
  series 
  of 
  dark 
  patches. 
  

   The 
  median 
  dark 
  band 
  also 
  has 
  light 
  patches. 
  

  

  Locality 
  5. 
  — 
  La 
  Mica, 
  mountains 
  southwest 
  of 
  Oros^. 
  (About 
  the 
  

   same 
  as 
  No. 
  1.) 
  Collected 
  by 
  Mr. 
  Picado. 
  

  

  Locality 
  6. 
  — 
  La 
  Mica, 
  mountains 
  southwest 
  of 
  Oros6. 
  The 
  dark 
  

   patches 
  are 
  almost 
  entirely 
  obliterated 
  by 
  the 
  presence 
  of 
  the 
  light 
  

   patches. 
  Collected 
  by 
  Mr. 
  Picado. 
  

  

  Locality 
  2. 
  — 
  (Same 
  as 
  locality 
  1.) 
  In 
  some 
  specimens 
  the 
  color 
  

   pattern 
  is 
  the 
  same 
  as 
  No. 
  1 
  ; 
  in 
  others 
  the 
  same 
  as 
  No. 
  6. 
  Collected 
  

   by 
  Mr. 
  Picado. 
  

  

  Locality. 
  — 
  Reventado. 
  Collected 
  by 
  Mr. 
  Tristan. 
  In 
  some 
  speci- 
  

   mens 
  the 
  color 
  pattern 
  is 
  the 
  same 
  as 
  No. 
  1 
  ; 
  in 
  others 
  it 
  is 
  the 
  same 
  

   as 
  No. 
  6; 
  in 
  others 
  it 
  is 
  like 
  No. 
  1, 
  but 
  with 
  a 
  transverse 
  row 
  of 
  light 
  

   spots 
  on 
  the 
  posterior 
  margin 
  of 
  each 
  of 
  the 
  thoracic 
  segments. 
  

  

  In 
  some 
  of 
  the 
  smaller 
  specimens 
  the 
  first 
  article 
  of 
  the 
  flagelhim 
  

   of 
  the 
  second 
  antennaB 
  is 
  not 
  much 
  longer 
  than 
  either 
  of 
  the 
  other 
  

   two 
  articles. 
  

  

  In 
  the 
  male 
  specimens 
  the 
  first 
  two 
  pairs 
  of 
  legs 
  have 
  the 
  propodus 
  

   somewhat 
  more 
  inflated 
  than 
  in 
  the 
  specimens 
  of 
  Philoscia 
  muscorum 
  

   from 
  North 
  America 
  with 
  which 
  I 
  have 
  compared 
  them. 
  

  

  