﻿On 
  Heterocera 
  from 
  Costa 
  Rica. 
  S3 
  

  

  Literature 
  referred 
  to. 
  

  

  Dabay, 
  E. 
  v. 
  — 
  " 
  Die 
  Siisswasser-Mikrofauna 
  Deutsch-Ost-Afrikas." 
  

  

  Zoologica, 
  Heft 
  59, 
  Lief. 
  3. 
  1910. 
  

   Ekman, 
  S. 
  — 
  " 
  Cladoceren 
  und 
  Frielebende 
  Copepoden 
  aus 
  Aegypten 
  

  

  und 
  dem 
  Sudan." 
  Swed. 
  Zool. 
  Exped. 
  Egypt, 
  pt. 
  i. 
  no. 
  8. 
  1904. 
  

   Gurney, 
  R. 
  — 
  " 
  On 
  the 
  Freshwater 
  Crustacea 
  of 
  Algeria 
  and 
  Tunisia." 
  

  

  Journ. 
  Roy. 
  Micr. 
  Soc. 
  1909, 
  p. 
  273. 
  

   Keilhack, 
  L. 
  — 
  u 
  Phyllopoda." 
  Die 
  Siisswasserfauna 
  Deutschlands, 
  

  

  Heft 
  10. 
  1909. 
  

   Sars, 
  G. 
  O. 
  — 
  " 
  Contributions 
  to 
  the 
  Knowledge 
  of 
  the 
  Freshwater 
  

  

  Entomostraca 
  of 
  South 
  America." 
  Arch. 
  f. 
  Math, 
  og 
  Naturv. 
  

  

  xxiii. 
  no. 
  3. 
  1901. 
  

   Stingelin, 
  Th. 
  — 
  " 
  Untersuchungen 
  iiber 
  die 
  Cladocerenfauna 
  von 
  

  

  Hinterindien, 
  Sumatra 
  und 
  Java." 
  Zool. 
  Jahrb. 
  (Syst.) 
  xxi. 
  

  

  1904. 
  

  

  EXPLANATION 
  OF 
  PLATE 
  II. 
  

  

  Fig. 
  1. 
  Moina 
  dubia, 
  Richard. 
  Female 
  from 
  the 
  Blue 
  Nile, 
  X 
  100. 
  

  

  Fig. 
  2. 
  Ditto. 
  First 
  antenna 
  of 
  male, 
  X 
  260. 
  

  

  Fig. 
  3. 
  Moina 
  salinarum, 
  Gurney. 
  Postabdomen 
  of 
  female, 
  X 
  190. 
  

  

  Fig. 
  4. 
  Ditto. 
  Head 
  of 
  male 
  from 
  below, 
  x 
  150. 
  

  

  Fig. 
  5. 
  Alona 
  rectangula. 
  Part 
  of 
  postabdomen 
  of 
  female, 
  X 
  1050. 
  

  

  Fig. 
  6. 
  Chgdorus 
  sp. 
  ? 
  Postabdomen, 
  X 
  260. 
  

  

  V. 
  — 
  New 
  Species 
  of 
  Hetefocera 
  from 
  Costa 
  Rica. 
  — 
  IV. 
  

   By 
  W. 
  Schaus, 
  F.Z.S. 
  

  

  Eriopyga 
  duruscula, 
  sp. 
  n. 
  

  

  <? 
  . 
  Head, 
  collar, 
  thorax, 
  and 
  fore 
  wings 
  light 
  brown 
  tinged 
  

   with 
  lilacine. 
  Abdomen 
  fuscous, 
  the 
  last 
  segment 
  and 
  sub- 
  

   dorsal 
  tufts 
  brown 
  ; 
  anal 
  hairs 
  yellowish. 
  Fore 
  wings 
  thinly 
  

   irrorated 
  with 
  black 
  ; 
  a 
  fine 
  black 
  antemedial 
  shade, 
  incurved 
  

   in 
  cell, 
  outcurved 
  below 
  cell; 
  orbicular 
  and 
  reniform 
  very 
  

   large, 
  outlined 
  in 
  buff 
  ; 
  the 
  postmedial 
  fine, 
  black, 
  indistinct, 
  

   slightly 
  incurved 
  below 
  reniform, 
  followed 
  on 
  veins 
  by 
  black 
  

   and 
  greyish 
  irrorations 
  ; 
  a 
  subterminal 
  straight 
  buff 
  line; 
  the 
  

   veins 
  terminally 
  irrorated 
  with 
  black 
  and 
  greyish 
  ; 
  base 
  of 
  

   fringe 
  finely 
  buff. 
  Hind 
  wings 
  thinly 
  scaled, 
  fuscous 
  grey 
  ; 
  

   the 
  fringe 
  luteous. 
  

  

  Expanse 
  31 
  mm. 
  

  

  Hah. 
  Volcano 
  Poas. 
  

  

  Belongs 
  to 
  the 
  group 
  of 
  E. 
  purpurigera, 
  Gn. 
  

   Ann. 
  dfc 
  Mag. 
  X. 
  Hist. 
  Ser. 
  8. 
  Vol 
  vii. 
  3 
  

  

  