﻿KEYS 
  FOR 
  THE 
  DETERMINATION 
  OF 
  APHIDS. 
  31 
  

  

  Body 
  of 
  apterous 
  viviparous 
  99 
  elongate, 
  2-2 
  § 
  times 
  as 
  long 
  as 
  broad 
  ; 
  

   antennae 
  about 
  half 
  the 
  length 
  of 
  body 
  ; 
  spur 
  of 
  last 
  joint 
  3-3£ 
  times 
  

   as 
  long 
  as 
  base 
  of 
  the 
  same 
  joint 
  ; 
  hairs 
  on 
  antennae 
  very 
  short, 
  

   scarcely 
  perceptible 
  ; 
  body 
  dark, 
  with 
  dark 
  waxy 
  covering. 
  In 
  slightly 
  

   rolled 
  leaves 
  of 
  couch 
  grass 
  and 
  possibly 
  other 
  graminaceous 
  plants 
  ; 
  

   East 
  Transcaucasia 
  . 
  . 
  . 
  . 
  . 
  . 
  . 
  . 
  G. 
  areshensis, 
  sp. 
  n. 
  

  

  54 
  (53). 
  Cornicles 
  at 
  least 
  twice 
  as 
  long 
  as 
  cauda. 
  

  

  55 
  (56). 
  Cornicles 
  only 
  twice 
  as 
  long 
  as 
  cauda, 
  with 
  middle 
  portion 
  slightly 
  thicker 
  

  

  than 
  middle 
  portion 
  of 
  cauda 
  ; 
  spur 
  of 
  last 
  joint 
  of 
  antennae 
  4-5 
  times 
  

   as 
  long 
  as 
  base 
  of 
  that 
  joint 
  ; 
  body 
  of 
  apterous 
  viviparous 
  99 
  broadly 
  

   ovate 
  ; 
  marginal 
  tubercles 
  present 
  on 
  prothorax 
  and 
  1st 
  and 
  7th 
  

   abdominal 
  segments, 
  those 
  on 
  prothorax 
  the 
  largest 
  

  

  Genus 
  Aresha, 
  n. 
  

  

  Body 
  of 
  apterous 
  viviparous 
  99 
  yellowish 
  brown 
  or 
  dark 
  brown, 
  sometimes 
  

   with 
  an 
  admixture 
  of 
  green, 
  almost 
  dull 
  or 
  else 
  with 
  a 
  very 
  faint 
  greasy 
  

   shine, 
  scarcely 
  dusted 
  ; 
  antennae, 
  legs, 
  cornicles 
  and 
  cauda 
  brown 
  ; 
  

   antennae 
  about 
  half 
  the 
  length 
  of 
  body 
  or 
  shorter 
  ; 
  spur 
  of 
  last 
  joint 
  

   4-5 
  times 
  as 
  long 
  as 
  base 
  of 
  that 
  joint 
  and 
  If 
  times 
  as 
  long 
  as 
  3rd 
  joint 
  ; 
  

   hairs 
  of 
  antennae 
  bristly, 
  thin 
  and 
  long, 
  the 
  larger 
  ones 
  of 
  the 
  3rd 
  

   joint 
  almost 
  twice 
  as 
  long 
  as 
  the 
  diameter 
  of 
  the 
  joint. 
  Elisavetpol 
  

   province 
  ; 
  on 
  roots 
  of 
  rice 
  . 
  . 
  . 
  . 
  . 
  . 
  A. 
  shelkovnikovi 
  , 
  sp. 
  n. 
  

  

  56 
  (55). 
  Cornicles 
  4-6 
  times 
  as 
  long 
  as 
  cauda, 
  dilated 
  in 
  the 
  middle 
  

  

  Genus 
  Carolinaea, 
  Wilson. 
  

  

  In 
  apterous 
  viviparous 
  99 
  the 
  spur 
  of 
  last 
  (5th) 
  joint 
  of 
  antennae 
  only 
  

   slightly 
  longer 
  than 
  the 
  base 
  of 
  that 
  joint 
  ; 
  antennae 
  shorter 
  than 
  

   half 
  the 
  length 
  of 
  body 
  ; 
  body 
  smooth, 
  greenish 
  yellow, 
  shaded 
  with 
  

   brown. 
  N. 
  America 
  ; 
  on 
  Carex 
  sp., 
  growing 
  in 
  marshes 
  

  

  C. 
  caricis, 
  Wilson. 
  

  

  Tribe 
  Callipterea. 
  

  

  1 
  (20). 
  Antennae 
  of 
  apterous 
  and 
  alate 
  viviparous 
  99 
  5-jointed, 
  short, 
  not 
  longer 
  

  

  than 
  head 
  with 
  thorax 
  ; 
  stiff 
  or 
  needle-like 
  hairs 
  all 
  over 
  body 
  

  

  Genus 
  Sipha, 
  Pass. 
  

  

  2 
  (3). 
  Skin 
  on 
  body 
  covered 
  with 
  small 
  spinules, 
  hairs 
  arising 
  from 
  thin 
  tubercles 
  

  

  Sipha 
  glyceriae, 
  Kalt. 
  (= 
  schoutedeni, 
  Guerc). 
  

  

  3 
  (2). 
  Skin 
  almost 
  smooth, 
  without 
  spinules. 
  

  

  4 
  (7). 
  Cauda 
  distinct, 
  constricted 
  at 
  base. 
  

  

  5 
  (6). 
  Spur 
  of 
  last 
  joint 
  almost 
  twice 
  as 
  long 
  as 
  basal 
  width 
  of 
  the 
  joint 
  and 
  

  

  subequal 
  to 
  3rd 
  joint 
  ; 
  apterous 
  viviparous 
  99 
  canary-yellow. 
  N. 
  

   America 
  ; 
  on 
  leaves 
  of 
  Pauicitm 
  saiiguiuale 
  and 
  cultivated 
  Graminaceae 
  

  

  S.flava, 
  Forbes. 
  

  

  6 
  (5). 
  Spur 
  of 
  the 
  last 
  joint 
  somewhat 
  shorter 
  than 
  basal 
  width 
  of 
  same 
  joint 
  

  

  and 
  almost 
  one-third 
  the 
  length 
  of 
  3rd 
  joint 
  ; 
  apterous 
  viviparous 
  99 
  

   at 
  first 
  rusty-yellow, 
  but 
  later 
  on 
  becoming 
  dark 
  brown 
  with 
  a 
  median 
  

   line 
  ; 
  body 
  covered 
  with 
  grey 
  hairs 
  and 
  whitish 
  dust 
  (in 
  alatae). 
  N. 
  

   America, 
  Colorado 
  ; 
  on 
  upper 
  surface 
  of 
  leaves 
  of 
  Agropyrum 
  glaucum 
  

  

  S. 
  agropyronensis, 
  Gillette. 
  

  

  7 
  (4) 
  . 
  Cauda 
  not 
  developed. 
  

  

  8 
  (19). 
  Hairs 
  narrowing 
  towards 
  the 
  tip. 
  

  

  