﻿336 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  There 
  appears 
  to 
  be 
  no 
  record 
  by 
  American 
  entomologists 
  of 
  injury 
  

   to 
  the 
  currant 
  or 
  any 
  other 
  plant 
  by 
  this 
  insect. 
  It 
  is 
  apparently 
  a 
  new 
  

   depredator 
  on 
  this 
  shrub. 
  Notwithstanding 
  its 
  general 
  resemblance 
  in 
  

   appearance, 
  it 
  can 
  hardly 
  be 
  said 
  that 
  it 
  is 
  closely 
  allied 
  to 
  Janus 
  integer^ 
  

   since 
  the 
  latter 
  is 
  referred 
  to 
  the 
  Uroceridae 
  — 
  a 
  family 
  with 
  females 
  

   having 
  ovipositors 
  adapted 
  for 
  boring 
  in 
  solid 
  wood, 
  in 
  which 
  their 
  

   larvae, 
  as 
  a 
  rule, 
  find 
  sustenance. 
  On 
  the 
  other 
  hand, 
  the 
  Teiithredinidae 
  

   are 
  largely 
  phyllophagous, 
  the 
  females 
  ovipositing 
  in 
  or 
  upon 
  the 
  softer 
  

   vegetable 
  tissues. 
  A 
  careful 
  comparison 
  of 
  the 
  two 
  insects 
  above 
  named 
  

   reveals 
  marked 
  structural 
  differences. 
  

  

  Anomalous 
  boring 
  habit 
  of 
  the 
  larva. 
  Of 
  the 
  24 
  British 
  species 
  

   of 
  Tenthredo 
  described 
  by 
  Cameron, 
  the 
  larvae 
  of 
  only 
  10 
  are 
  mentioned, 
  

   and 
  each 
  one 
  of 
  these 
  is 
  an 
  external 
  feeder. 
  The 
  habits 
  of 
  the 
  Ten- 
  

   thredo 
  larvae 
  in 
  this 
  country 
  appear 
  to 
  be 
  practically 
  unknown, 
  and 
  we 
  

   have 
  found 
  no 
  record 
  of 
  any 
  of 
  the 
  species 
  living 
  within 
  the 
  stems 
  of 
  

   plants. 
  

  

  In 
  Great 
  Britain, 
  in 
  the 
  closely 
  allied 
  genus 
  oiPoecilosoi7ia^ 
  P. 
  candida- 
  

   tum 
  Fall., 
  is 
  recorded 
  as 
  boring 
  in 
  the 
  pith 
  of 
  rose 
  branches 
  in 
  much 
  the 
  

   same 
  way 
  as 
  Tefithredo 
  riifopectus 
  is 
  supposed 
  to 
  work 
  in 
  the 
  currant 
  

   stems. 
  The 
  perfect 
  fly 
  appears 
  about 
  the 
  middle 
  of 
  April 
  or 
  early 
  in 
  

   May 
  and 
  lays 
  her 
  eggs 
  singly 
  in 
  the 
  tips 
  of 
  the 
  young 
  brandies. 
  The 
  

   newly 
  hatched 
  larva 
  bores 
  into 
  the 
  pith, 
  ' 
  whereby 
  the 
  leaves 
  become 
  

   withered, 
  and 
  then 
  damage 
  is 
  done 
  to 
  the 
  plant.'* 
  Two 
  species 
  of 
  

   Cryptocampus, 
  C. 
  saliceti 
  and 
  C. 
  angustus, 
  are 
  also 
  recorded 
  by 
  Mr 
  Cam- 
  

   eron 
  as 
  boring 
  in 
  the 
  pith 
  of 
  young 
  willow 
  twigs 
  of 
  several 
  species. 
  

   Certain 
  species 
  q{ 
  Eimra 
  and 
  Ponta?iia 
  are 
  said 
  to 
  pass 
  their 
  early 
  stages 
  

   within 
  stems 
  of 
  plants 
  without 
  forming 
  galls, 
  that 
  is, 
  they 
  are 
  practically 
  

   borers. 
  Emphytiis 
  maculatus 
  accordmg 
  to 
  Riley 
  deposits 
  her 
  eggs 
  in 
  the 
  

   stem 
  of 
  the 
  cultivated 
  strawberry, 
  and 
  by 
  ' 
  their 
  presence 
  causing 
  a 
  

   swelling 
  in 
  the 
  stalk.' 
  The 
  larvae 
  of 
  some 
  other 
  species 
  of 
  Tenthre- 
  

   dinidae 
  live 
  in 
  galls, 
  in 
  various 
  fruits, 
  or 
  within 
  mines 
  in 
  leaves, 
  the 
  great 
  

   majority, 
  however, 
  appear 
  to 
  be 
  external 
  leaf 
  feeders. 
  The 
  full 
  grown 
  

   larvae 
  of 
  some 
  ot^these 
  insects 
  are 
  known 
  to 
  bore 
  into 
  stems 
  of 
  plants 
  

   for 
  the 
  purpose 
  of 
  finding 
  a 
  suitable 
  place 
  for 
  pupation. 
  

  

  Description. 
  The 
  perfect 
  insect 
  may 
  be 
  distinguished 
  from 
  Junius 
  

   integer 
  (plate 
  i, 
  fig. 
  2) 
  by 
  the 
  body 
  being 
  entirely 
  black 
  and 
  the 
  

   abdomen 
  flattened 
  above 
  (depressed), 
  while 
  in 
  the 
  latter 
  the 
  abdomen 
  is 
  

   flattened 
  on 
  the 
  sides 
  (compressed). 
  The 
  abdomen 
  of 
  the 
  male 
  oi 
  Janus 
  

  

  a 
  Cameron: 
  Monograph 
  of 
  the 
  British 
  phytophagous 
  hymenoptera 
  1882. 
  1 
  :210. 
  

  

  