﻿200 
  

  

  BOTANICAL 
  GAZETTE. 
  [ 
  AugUSt 
  

  

  Other 
  flower, 
  and 
  the 
  style-brush 
  leaves 
  a 
  new 
  load. 
  As 
  

   soon 
  as 
  the 
  bee 
  lets 
  go 
  her 
  hold 
  upon 
  the 
  basal 
  process, 
  the 
  

   keel 
  returns 
  to 
  its 
  place 
  against 
  the 
  banner, 
  and 
  the 
  style 
  

   draws 
  back 
  into 
  it. 
  

  

  Visitors: 
  Hymenoptera 
  — 
  Ap/'dce 
  : 
  ( 
  i 
  ) 
  Megachile 
  brevis 
  

  

  Say 
  9 
  , 
  s. 
  and 
  c. 
  p. 
  ; 
  (2) 
  M. 
  exilis 
  Cr. 
  $ 
  , 
  s. 
  

  

  Exiranuftial 
  nectaries} 
  — 
  The 
  following 
  insects 
  were 
  

   taken 
  while 
  obtaining 
  nectar 
  from 
  these 
  structures 
  : 
  

  

  Hymenoptera 
  — 
  AndrenldcB 
  : 
  (i) 
  Augochlora 
  pura 
  Say; 
  

   (2) 
  Halictus 
  flavipesF. 
  ; 
  (3) 
  H. 
  confusus 
  Sm. 
  VesfuU: 
  (4) 
  

   Vespa 
  germanica 
  F. 
  ; 
  (5) 
  Polistes 
  pallipes 
  St. 
  Farg. 
  ^«- 
  

   iiieiitdie 
  : 
  (6) 
  Odynerus 
  pedestris 
  Sauss. 
  CrabronidcB 
  : 
  (f) 
  

   Oxybelus 
  4-notatus 
  Say. 
  Philanthid<B 
  : 
  (8) 
  Philanthus 
  punc- 
  

   tatus 
  Say 
  ; 
  {9) 
  Cerceri's 
  clypeata 
  Dahlb. 
  ; 
  (10) 
  C. 
  kennicot- 
  

   tii 
  Cr. 
  : 
  (11) 
  C. 
  finitima 
  Cr. 
  Larrida: 
  (12) 
  Larra 
  acuta 
  Pat- 
  

   ton. 
  Sfhecidce: 
  (13) 
  Pelopocus 
  cementarius 
  Dru. 
  ; 
  (h)^^^' 
  

   lybion 
  cferuleum 
  L. 
  Poinpilidce 
  : 
  (15) 
  Agenia 
  longula 
  Cr. 
  

   Mzitilliditi: 
  (16) 
  Sph;iirophthalma 
  macra 
  Cr. 
  Formiciih: 
  

   (17) 
  A 
  black 
  species 
  not 
  abundant 
  enough 
  to 
  interfere 
  with 
  

   other 
  insects 
  or 
  to 
  suggest 
  a 
  thought 
  of 
  myrmecophilism- 
  

   ChrysldldcR 
  : 
  (18) 
  Hedychridium 
  dimidiatum 
  Say. 
  Bracom- 
  

   d(£. 
  : 
  (19) 
  Apanteles 
  sp. 
  ; 
  (20) 
  Microdus 
  sp. 
  

  

  ^\^\^\-^—Syrfhida: 
  (21) 
  Mesograpta 
  marginata 
  Say. 
  

  

  Pmpidce: 
  (22) 
  Empis 
  sp. 
  TachinidcB 
  : 
  (23) 
  Eggeria 
  .'' 
  sp 
  

  

  igiM 
  : 
  (24-25) 
  Sarcophaga 
  spp. 
  Muscida 
  : 
  (26) 
  L"" 
  

  

  ^iacq. 
  G 
  eoiny 
  zidct 
  : 
  {yi) 
  ^^ 
  . 
  Drosofhilldm 
  : 
  (3i'32jspP- 
  

   Hemiptera— 
  C«/5/a^^e: 
  (33) 
  Lygus 
  pratensis 
  L. 
  

   ^-piicm-fcea 
  Pitcherr 
  torr. 
  & 
  Gray.— 
  The 
  pale 
  blue 
  

  

  that 
  

  

  flowers 
  are 
  approximated 
  in 
  a 
  rather 
  close 
  raceme, 
  so 
  

   the 
  attractive 
  function 
  is 
  performed 
  by 
  the 
  inflorescence 
  an" 
  

   does 
  not 
  depend 
  especially 
  upon 
  the 
  banner, 
  as 
  in 
  solitary 
  

   flowers. 
  For 
  the 
  same 
  reason 
  the 
  wings 
  and 
  keel 
  are 
  re- 
  

   lieved 
  of 
  their 
  special 
  office 
  of 
  aflbrding 
  a 
  landing-phice^J 
  

   the 
  bees 
  to 
  settle 
  upon. 
  Accordingly, 
  these 
  insects 
  aligns 
  

   upon 
  the 
  flower-cluster 
  and 
  crawl 
  from 
  one 
  flower 
  to 
  an- 
  

   other. 
  The 
  calyx-tube 
  is 
  very 
  long 
  (6 
  mm.), 
  which 
  maizes 
  

   the 
  nectar 
  maccessible 
  to 
  short-tongued 
  visitors. 
  The 
  petal 
  - 
  

   a 
  so 
  bemg 
  freed 
  from 
  their 
  original 
  functions 
  by 
  the 
  flo^ve^ 
  

  

  cluster, 
  are 
  disposed 
  so 
  as 
  to 
  make 
  the 
  nectar 
  still 
  more 
  

  

  ture 
  sI^T 
  T'™' 
  t 
  '''' 
  '"^^"'^^ 
  °^ 
  extranuptial 
  nectaries 
  and 
  for 
  reference 
  to 
  tUe 
  Utera. 
  

   30 
  ' 
  ]lf^'%.^'y!"^<-'''0Phmsm, 
  Psyche 
  Feb.-Mareh, 
  1889. 
  171-180. 
  ^., 
  ^^, 
  

  

  On 
  the 
  fertiluation 
  of 
  A. 
  monoica, 
  see 
  Meehnn 
  : 
  Proc. 
  Acad. 
  Nat. 
  Scf. 
  Fhil*- 
  18^' 
  

  

  323-325. 
  

  

  