﻿THE 
  COCCIDAE 
  OF 
  SOUTH 
  AFRICA. 
  107 
  

  

  The 
  scale 
  of 
  the 
  adult 
  $ 
  is 
  very 
  long 
  and 
  narrow, 
  2*5 
  to 
  3 
  mm. 
  long 
  and 
  about 
  0*5 
  

   mm. 
  broad, 
  long 
  comma-shaped, 
  usually 
  reddish 
  or 
  greyish-brown 
  with 
  paler 
  margins 
  ; 
  

   on 
  some 
  host-plants 
  the 
  colour 
  is 
  paler. 
  Exuviae 
  terminal, 
  yellowish. 
  Ventral 
  scale 
  

   well 
  developed, 
  whitish. 
  

  

  $ 
  puparium 
  much 
  smaller 
  and 
  more 
  delicate 
  than 
  the 
  $ 
  scale, 
  and 
  paler 
  in 
  colour. 
  

  

  Adult 
  2 
  elongate, 
  sides 
  ± 
  parallel, 
  abdominal 
  segments 
  slightly 
  wider, 
  but 
  without 
  

   prominent 
  lateral 
  projections. 
  The 
  colour 
  when 
  alive 
  is 
  pale 
  yellow. 
  Pygidium 
  as 
  

   illustrated 
  (fig. 
  182). 
  Circumgenital 
  glands 
  in 
  5 
  groups 
  : 
  

  

  4 
  

  

  6—8 
  6—8 
  

  

  4_5 
  4_5 
  

  

  Habitat 
  : 
  On 
  citrus, 
  Cape 
  Peninsula 
  ; 
  collected 
  by 
  C. 
  P. 
  Lounsbury. 
  Also 
  at 
  Port 
  

   St. 
  Johns, 
  Stanger, 
  and 
  Warmbaths. 
  

   Collection 
  No. 
  : 
  261. 
  

  

  Genus 
  Sschnaspis, 
  Douglas. 
  

  

  Female 
  scale 
  extremely 
  long 
  and 
  narrow, 
  with 
  the 
  first 
  exuviae 
  extending 
  beyond 
  

   the 
  anterior 
  margin. 
  Male 
  puparium 
  elongate, 
  similar 
  to 
  that 
  of 
  the 
  second 
  stage 
  

   female, 
  without 
  the 
  central 
  hinge 
  of 
  the 
  <J 
  of 
  Lepidosaphes. 
  

  

  Adult 
  $ 
  very 
  long 
  and 
  narrow, 
  posterior 
  margin 
  of 
  pygidium 
  forming 
  a 
  regular 
  

   shallow 
  concave 
  depression, 
  from 
  which 
  the 
  median 
  lobes 
  project. 
  Dorsal 
  surface 
  of 
  

   pygidium 
  with 
  a 
  peculiar 
  lattice-work 
  design. 
  Circuir 
  genital 
  glands 
  in 
  3 
  or 
  5 
  small 
  

   groups. 
  

  

  165. 
  Eschnaspis 
  longirostris 
  (Sign.) 
  (Plate 
  vi, 
  fig. 
  184). 
  

  

  Mytilaspis 
  longirostris, 
  Sign., 
  Bull. 
  Soc. 
  Ent. 
  Fr. 
  (6) 
  ii, 
  p. 
  xxxv, 
  1882. 
  

  

  Ischnaspis 
  filiformis, 
  Douglas, 
  Ent. 
  Mo. 
  Mag. 
  xxiv, 
  p. 
  21, 
  1887. 
  

  

  Ischnaspis 
  filiformis, 
  Newst., 
  Mon. 
  Brit. 
  Coc. 
  i, 
  p. 
  210, 
  1901. 
  

  

  Common 
  Name 
  : 
  Black 
  Thread 
  Scale. 
  

  

  Scale 
  of 
  adult 
  $ 
  3 
  to 
  3 
  "5 
  mm. 
  long, 
  very 
  narrow, 
  with 
  sides 
  parallel 
  ; 
  posterior 
  

   extremity 
  slightly 
  broader 
  ; 
  colour 
  shining 
  black, 
  with 
  greyish 
  margins. 
  Scale 
  very 
  

   convex, 
  often 
  showing 
  slight 
  indications 
  of 
  transverse 
  ridges, 
  usually 
  straight, 
  but 
  

   where 
  a 
  number 
  are 
  crowded 
  together 
  the 
  scales 
  often 
  make 
  a 
  regular 
  bend 
  to 
  avoid 
  

   other 
  scales 
  and 
  then 
  continue 
  again 
  in 
  the 
  original 
  direction. 
  Larval 
  exuviae 
  

   terminal, 
  brownish 
  in 
  colour 
  ; 
  second 
  exuviae 
  occupying 
  about 
  one-quarter 
  of 
  the 
  

   length 
  of 
  adult 
  scale, 
  covered 
  with 
  shiny 
  black 
  secretion 
  like 
  the 
  remainder 
  of 
  the 
  

   scale. 
  Ventral 
  scale 
  complete, 
  robust, 
  white 
  or 
  greyish 
  in 
  colour. 
  

  

  Adult 
  $ 
  very 
  long, 
  sides 
  parallel, 
  broadest 
  at 
  the 
  free 
  abdominal 
  segments. 
  Colour 
  

   yellow. 
  Pygidium 
  as 
  illustrated 
  (fig. 
  184). 
  Circumgenital 
  glands 
  in 
  3 
  groups 
  : 
  

  

  3—4 
  

   4—6 
  4—6 
  

  

  A 
  few 
  large 
  (to 
  4 
  mm. 
  long) 
  specimens 
  in 
  the 
  Cape 
  collection, 
  otherwise 
  typical, 
  

   have 
  5 
  groups 
  of 
  glands. 
  Three 
  of 
  these 
  have 
  : 
  

  

  4 
  5 
  4 
  

  

  7 
  7 
  7 
  6 
  7 
  7 
  

  

  5 
  5 
  3 
  4 
  3 
  3 
  

  

  