﻿436 
  

  

  P. 
  adonidum, 
  L., 
  (P. 
  longispiniis, 
  Targ.) 
  (longtailed 
  mealy 
  bug). 
  

   This 
  insect 
  is 
  both 
  a 
  greenhouse 
  and 
  outdoor 
  pest, 
  particularly 
  on 
  

   Dracaenas, 
  also 
  attacking 
  the 
  following 
  : 
  — 
  Citron, 
  Croton 
  sp., 
  fig, 
  

   Guadaloupe 
  Island 
  palm 
  (Erythea 
  edulis), 
  guava 
  (PsidAum 
  sp.), 
  lemon, 
  

   lobster 
  cactus 
  (Epiphylliim 
  sp.), 
  mango 
  (Mangifera 
  sp.), 
  Opuntia 
  sp., 
  

   plum 
  (Primus 
  domestica), 
  sago 
  palm 
  [Cycas 
  revoluta), 
  and 
  many 
  other 
  

   cultivated 
  plants. 
  It 
  is 
  found 
  generally 
  throughout 
  the 
  State 
  in 
  

   greenhouses 
  and 
  ornamental 
  gardens. 
  

  

  P. 
  maritimiis, 
  Ehrh., 
  (ocean 
  mealy-bug) 
  found 
  hitherto 
  only 
  on 
  

   the 
  roots 
  of 
  Eriogonum 
  latifolium 
  at 
  Santa 
  Cruz. 
  

  

  P. 
  obscurus, 
  (obscure 
  mealy-bug) 
  found 
  on 
  roots 
  of 
  cactus 
  

   (Opuntia 
  sp.) 
  at 
  Boyle 
  Heights, 
  Los 
  Angeles. 
  

  

  P. 
  pseudonipae, 
  Ckll., 
  (Kentia 
  mealy-bug) 
  on 
  Kentia 
  palm 
  (Kentia 
  

   sp.) 
  and 
  coconut 
  palm 
  (Cocos 
  nucifera). 
  

  

  P. 
  quercus, 
  Ehrh., 
  (interior 
  live 
  oak 
  mealy-bug) 
  on 
  leaves 
  and 
  in 
  

   cracks 
  of 
  the 
  bark 
  of 
  the 
  " 
  maul 
  " 
  or 
  interior 
  live 
  oak 
  (Quercus 
  

   chrysolepis). 
  

  

  P. 
  ryani, 
  Coq., 
  (cypress 
  mealy-bug) 
  infests 
  Chinese 
  arbor- 
  vitae 
  

   (Thuya 
  orientalis), 
  Monterey 
  cypress 
  (Cupressus 
  macrocarpa) 
  and 
  

   Norfolk 
  Island 
  pine 
  (Araiicaria 
  excelsa). 
  

  

  P. 
  salinus, 
  Ckll., 
  (grass 
  mealy-bug), 
  found 
  on 
  grasses. 
  

  

  P. 
  sequoiae, 
  Colm., 
  (redwood 
  mealy-bug), 
  so 
  far 
  found 
  on 
  the 
  redwood 
  

   ( 
  Sequoia 
  sempervirens 
  ) 
  . 
  

  

  P. 
  solani, 
  Ckll., 
  (solanum 
  mealy-bug) 
  is 
  found 
  usually 
  under- 
  

   ground 
  or 
  on 
  branches 
  which 
  touch 
  the 
  ground, 
  on 
  potato 
  (SolaJium 
  

   tuberosum) 
  and 
  tomato 
  (Lycopersicum 
  esculentum), 
  besides 
  other 
  

   plants. 
  

  

  P. 
  yerba-santae, 
  Essig, 
  (Yerba 
  Santa 
  mealy-bug). 
  Abundant 
  on 
  

   leaves 
  of 
  Yerba 
  Santa 
  or 
  mountain 
  balm 
  (Eriodictyon 
  calif 
  ornicum). 
  

  

  Ceroputo 
  yuccae, 
  Coq. 
  This 
  species 
  is 
  included 
  because 
  of 
  its 
  great 
  

   resemblance 
  to 
  mealy 
  bugs. 
  At 
  present 
  it 
  is 
  not 
  economic, 
  but 
  may 
  

   become 
  so 
  at 
  any 
  time. 
  Found 
  on 
  roots, 
  stems 
  and 
  foliage 
  of 
  : 
  

   Banana 
  (Musa 
  sapientium), 
  lemon 
  (Citrus 
  medica 
  limon), 
  lime 
  (C. 
  

   medica 
  acida), 
  Yucca 
  australis, 
  Y. 
  filifera, 
  Y. 
  ivhipp)lei, 
  and 
  many 
  

   other 
  plants. 
  

  

  Of 
  the 
  natural 
  enemies 
  of 
  mealy-bugs 
  two 
  internal 
  parasites 
  are 
  

   described, 
  Chrysoplatycerus 
  splendens^ 
  How., 
  which 
  is 
  figured, 
  and 
  

   Leucopis 
  bella, 
  Loew. 
  Of 
  the 
  predaceous 
  enemies, 
  the 
  Coccinellids, 
  the 
  

   larvae 
  of 
  many 
  of 
  which 
  are 
  covered 
  with 
  white 
  filaments 
  and 
  are 
  

   therefore 
  not 
  unlike 
  the 
  mealy-bugs 
  themselves, 
  are 
  the 
  most 
  

   important, 
  and 
  the 
  following 
  are 
  figured 
  and 
  their 
  life-histories 
  

   detailed 
  : 
  — 
  

  

  Cryptolaemus 
  7nontrouzieri, 
  Muls. 
  Cryptogonus 
  orbiculus, 
  Schon., 
  a 
  

   smaller 
  species 
  introduced 
  in 
  1910 
  from 
  the 
  Philippines 
  ; 
  the 
  larvae 
  

   prey 
  principally 
  on 
  the 
  eggs 
  and 
  young 
  mealy-bugs. 
  Chilocorns 
  

   bivulnerus, 
  Muls., 
  is 
  a 
  native 
  species. 
  Hyperaspis 
  lateralis, 
  Muls., 
  is 
  

   widely 
  distributed 
  in 
  the 
  State, 
  the 
  larvae 
  attack 
  mainly 
  native 
  

   mealy-bugs, 
  but 
  are 
  frequently 
  victims 
  to 
  an 
  internal 
  parasite 
  which 
  

   lessens 
  their 
  effectiveness. 
  Scymnus 
  guttulatus, 
  Lee, 
  is 
  a 
  native 
  species 
  

   and 
  often 
  does 
  very 
  valuable 
  work. 
  S. 
  7narginicoUis, 
  Mann., 
  feeds 
  on 
  

   many 
  other 
  scale-insects 
  besides 
  mealy-bugs. 
  S. 
  nebulosus, 
  Lee, 
  preys 
  

   on 
  mealy-bugs, 
  other 
  scale-insects 
  and 
  plant 
  lice. 
  S. 
  sordidus, 
  Horn, 
  

   resembles 
  the 
  last 
  species 
  in 
  its 
  habits. 
  RJiizobius 
  ventralis, 
  Er., 
  intro- 
  

  

  