﻿100 
  CHAS. 
  K. 
  BKAIN. 
  

  

  154. 
  Chionaspis 
  (Phenacaspis) 
  natalensis, 
  Ckll. 
  (Plate 
  v, 
  fig. 
  165). 
  

   Phenacaspis 
  natalensis, 
  Ckll., 
  Ann. 
  Mag. 
  N.H. 
  (7) 
  ix, 
  p, 
  25, 
  1902. 
  

   Phenacaspis 
  natalensis, 
  Fernald, 
  Catalogue, 
  p. 
  238, 
  1903. 
  

   Professor 
  Cockerell's 
  description 
  is 
  as 
  follows 
  : 
  — 
  ■ 
  

  

  ' 
  $ 
  scale 
  white, 
  about 
  3 
  mm. 
  long, 
  pyriform 
  ; 
  exuviae 
  pale 
  orange-brown. 
  

  

  " 
  Five 
  groups 
  of 
  circumgenital 
  glands 
  ; 
  median 
  of 
  10, 
  anterior 
  laterals 
  22-26, 
  

   posterior 
  laterals 
  19-26. 
  Anal 
  and 
  genital 
  apertures 
  opposite. 
  Median 
  lobes 
  large, 
  

   widely 
  diverging, 
  broader 
  than 
  long, 
  the 
  long 
  inner 
  margin 
  strongly 
  serrulate 
  ; 
  their 
  

   bases 
  well 
  apart, 
  the 
  space 
  occupied 
  by 
  the 
  usual 
  pair 
  of 
  short 
  spines. 
  Second 
  lobe 
  

   represented 
  by 
  three 
  elongated 
  and 
  rounded 
  lobules, 
  the 
  first 
  of 
  which 
  is 
  largest 
  and 
  

   bears 
  a 
  spine. 
  Third 
  lobe 
  represented 
  by 
  a 
  very 
  long 
  narrow 
  lobule 
  bearing 
  a 
  spine 
  

   followed 
  by 
  a 
  broad 
  and 
  much 
  shorter 
  lobule, 
  and 
  then 
  a 
  very 
  broad 
  serrulate 
  lobule, 
  

   having 
  its 
  outer 
  slope 
  much 
  the 
  longest. 
  The 
  fourth 
  lobe 
  is 
  represented 
  by 
  a 
  triangu- 
  

   lar 
  lobule 
  bearing 
  a 
  spine 
  and 
  two 
  slight 
  swellings 
  of 
  the 
  margin, 
  too 
  slight 
  to 
  be 
  called 
  

   lobules. 
  

  

  $ 
  scale 
  feebly 
  tricarinate 
  or 
  barely 
  keeled 
  at 
  ail." 
  

   Habitat: 
  On 
  mango, 
  Durban, 
  Natal; 
  collected 
  by 
  C. 
  Fuller, 
  1901. 
  On 
  palm, 
  

   Durban 
  ; 
  collected 
  by 
  A. 
  Kelly, 
  July 
  1915. 
  

   Collection 
  Nos. 
  : 
  171, 
  171a. 
  

  

  155. 
  Chionaspis 
  (Dinaspis) 
  imbricata, 
  sp.n. 
  (Plate 
  vi, 
  fig. 
  179). 
  

  

  In 
  material 
  seen 
  by 
  the 
  writer 
  the 
  scales 
  invariably 
  occupy 
  cracks 
  in 
  the 
  bark 
  on 
  the 
  

   stems 
  of 
  the 
  host-plant. 
  

  

  Scale 
  of 
  adult 
  $ 
  small, 
  elongate, 
  almost 
  parallel-sided, 
  white, 
  with 
  orange 
  to 
  brown 
  

   exuviae. 
  

  

  Puparium 
  of 
  <J 
  similar 
  but 
  smaller. 
  

  

  Adult 
  $, 
  when 
  cleared 
  and 
  mounted, 
  small, 
  averaging 
  0*75 
  mm. 
  long 
  and 
  048 
  mm. 
  

   broad. 
  The 
  anterior 
  end 
  is 
  broadly 
  rounded 
  ; 
  the 
  sides 
  of 
  the 
  body 
  are 
  almost 
  parallel 
  

   to 
  a 
  little 
  more 
  than 
  half 
  t 
  the 
  length, 
  when 
  they 
  gradually 
  taper 
  to 
  the 
  pointed 
  

   pygidium. 
  The 
  anterior 
  half 
  of 
  the 
  body 
  and 
  the 
  pygidial 
  area 
  are 
  more 
  densely 
  

   chitinised 
  than 
  are 
  the 
  free 
  abdominal 
  segments 
  and 
  appear 
  yellowish. 
  The 
  chitin 
  on 
  

   these 
  parts 
  is 
  thickened 
  in 
  minute 
  ridges, 
  giving 
  the 
  impression 
  of 
  a 
  finger-print, 
  a 
  

   character 
  only 
  found 
  in 
  a 
  few 
  Coccids 
  . 
  

  

  It 
  is 
  impossible 
  to 
  describe 
  the 
  pygidial 
  margin 
  as 
  having 
  definite 
  lobes, 
  and 
  plates 
  

   are 
  absent. 
  The 
  chitin 
  is 
  here 
  folded 
  so 
  as 
  to 
  form 
  numerous 
  rounded 
  more 
  or 
  less 
  

   imbricated 
  prominences, 
  some 
  of 
  which 
  reach, 
  or 
  extend 
  beyond, 
  the 
  margin, 
  which 
  

   thus 
  appears 
  festooned. 
  There 
  are 
  a 
  few 
  spines 
  of 
  moderate 
  length 
  at 
  intervals 
  

   around 
  the 
  margin. 
  The 
  anal 
  opening 
  is 
  set 
  well 
  back 
  from 
  the 
  margin 
  and 
  around 
  it 
  

   are 
  a 
  number 
  of 
  conspicuous 
  thin 
  spots 
  in 
  the 
  chitin, 
  appearing 
  as 
  perforations. 
  In 
  

   the 
  second 
  stage 
  $ 
  there 
  are 
  about 
  three 
  simple 
  plates 
  on 
  each 
  side 
  of 
  the 
  pygidium. 
  

  

  Antennae 
  set 
  well 
  forward, 
  tubercles 
  moderately 
  prominent 
  with 
  one 
  or 
  two 
  curved 
  

   setae. 
  Parastigmatic 
  glands 
  O. 
  Circumgenital 
  glands 
  O. 
  

  

  Habitat 
  : 
  On 
  stems 
  of 
  Euclea 
  natalensis, 
  Point 
  Road, 
  Durban 
  ; 
  collected 
  by 
  C. 
  P. 
  v. 
  

   d.Merwe, 
  July 
  1916. 
  

  

  Collection 
  No. 
  : 
  157. 
  

  

  