﻿36 
  A. 
  K. 
  MORDVILKO. 
  

  

  15 
  (14). 
  Third 
  joint 
  somewhat 
  shorter 
  than 
  or 
  almost 
  equal 
  to 
  4th 
  and 
  5th 
  together 
  ; 
  

  

  4th 
  joint 
  shorter 
  than 
  5th 
  ; 
  antennae 
  of 
  apterous 
  viviparous 
  22 
  only 
  

   one-fifth 
  to 
  two-sevenths 
  the 
  length 
  of 
  body, 
  but 
  sometimes 
  almost 
  

   one-third. 
  

  

  16 
  (17). 
  Body 
  and 
  extremities 
  hairy 
  ; 
  hairs 
  on 
  3rd 
  joint 
  of 
  antennae 
  as 
  long 
  as 
  

  

  from 
  half 
  to 
  almost 
  the 
  whole 
  diameter 
  of 
  that 
  joint 
  and 
  even 
  some- 
  

   what 
  more 
  ; 
  4th 
  joint 
  almost 
  equal 
  to 
  2nd 
  ; 
  antennae 
  one-quarter 
  

   to 
  one-third 
  the 
  length 
  of 
  body 
  ; 
  colour 
  yellowish 
  green 
  or 
  whitish 
  

   green, 
  dull. 
  On 
  roots 
  of 
  Graminaceae 
  live 
  only 
  migrantes 
  ; 
  in 
  May- 
  

   June 
  appear 
  the 
  alate 
  sexuparae, 
  which 
  migrate 
  to 
  stems 
  and 
  branches 
  

   of 
  Pistacia 
  ; 
  South 
  Europe, 
  Transcaucasia, 
  Asia 
  Minor, 
  Turkestan.* 
  

  

  F. 
  [Pemphigella) 
  follicnlaria, 
  Pass. 
  

  

  17 
  (16). 
  Hairs 
  very 
  short 
  and 
  sparse, 
  little 
  noticeable 
  or 
  not 
  noticeable 
  either 
  

  

  on 
  body 
  or 
  limbs 
  ; 
  hairs 
  on 
  3rd 
  joint 
  of 
  antennae 
  as 
  long 
  as 
  one-seventh 
  

   to 
  one-third 
  of 
  its 
  diameter, 
  but 
  sometimes 
  one-half 
  to 
  two-thirds 
  of 
  

   this 
  diameter, 
  in 
  the 
  latter 
  case 
  4th 
  joint 
  distinctly 
  longer 
  than 
  2nd 
  ; 
  

   antennae 
  of 
  apterous 
  viviparous 
  22 
  one-fifth 
  to 
  two-sevenths 
  the 
  length 
  

   of 
  body. 
  

  

  18 
  (23). 
  Fourth 
  joint 
  of 
  antennae 
  of 
  apterous 
  viviparous 
  2$ 
  distinctly 
  longer 
  

  

  than 
  2nd. 
  

  

  19 
  (22). 
  Hairs 
  on 
  antennae 
  scarcely 
  noticeable, 
  equal 
  only 
  to 
  one-seventh 
  to 
  

  

  one-sixth 
  the 
  diameter 
  of 
  3rd 
  joint 
  ; 
  2nd 
  joint 
  of 
  antennae 
  two-fifths 
  

   the 
  length 
  of 
  3rd. 
  

  

  20 
  (21). 
  Eyes 
  in 
  apterous 
  viviparous 
  22 
  with 
  numerous 
  facets 
  ; 
  anal 
  sternite 
  

  

  hardly 
  projecting 
  behind 
  the 
  tergite 
  ; 
  antennae 
  in 
  apterous 
  viviparous 
  

   2? 
  about 
  two-ninths 
  to 
  one-quarter 
  the 
  length 
  of 
  body 
  (in 
  alatae 
  about 
  

   three-eighths), 
  their 
  3rd 
  joint 
  slightly 
  less 
  than 
  twee 
  as 
  long 
  as 
  4th 
  

  

  F. 
  marginata, 
  Koch. 
  

  

  21 
  (20). 
  Eyes 
  of 
  apterous 
  viviparous 
  22 
  with 
  three 
  facets 
  ; 
  anal 
  sternite 
  slightly 
  

  

  projecting 
  behind 
  the 
  tergite 
  ; 
  3rd 
  joint 
  of 
  antennae 
  twice 
  as 
  long 
  as 
  

   4th 
  . 
  . 
  . 
  . 
  • 
  • 
  • 
  ■ 
  • 
  • 
  F. 
  proximal 
  is, 
  sp. 
  n. 
  

  

  22 
  (19). 
  Hairs 
  on 
  3rd 
  joint 
  of 
  antennae 
  one-half 
  to 
  two-thirds 
  diameter 
  of 
  joint 
  ; 
  

  

  3rd 
  joint 
  almost 
  U 
  times 
  as 
  long 
  as 
  4th 
  ; 
  hind 
  legs 
  (femora 
  and 
  tibiae) 
  

   about 
  half 
  length 
  of 
  body 
  ; 
  1st 
  joint 
  of 
  tarsi 
  about 
  one-quarter 
  length 
  

   of 
  2nd 
  ; 
  anal 
  sternite 
  only 
  slightly 
  receding 
  behind 
  the 
  tergite 
  

  

  F. 
  mokrzeckyi, 
  sp. 
  n. 
  

  

  23 
  (18). 
  Fourth 
  joint 
  of 
  antennae 
  in 
  apterous 
  viviparous 
  2? 
  almost 
  equal 
  to 
  2nd 
  ; 
  

  

  eyes 
  with 
  three 
  facets. 
  

  

  24 
  (25). 
  First 
  joint 
  of 
  hind 
  tarsus 
  in 
  apterous 
  viviparous 
  2? 
  almost 
  half 
  as 
  long 
  

  

  as 
  2nd 
  ; 
  hind 
  legs 
  (femur 
  and 
  tibia) 
  almost 
  one-third 
  length 
  of 
  body, 
  

   the 
  tarsus 
  about 
  quarter 
  length 
  of 
  tibia 
  . 
  . 
  . 
  . 
  F. 
  trivialis, 
  Pass.f 
  

  

  25 
  (24). 
  First 
  joint 
  of 
  hind 
  tarsus 
  half 
  as 
  long 
  as 
  2nd 
  ; 
  tarsus 
  one-third 
  to 
  three- 
  

  

  sevenths 
  length 
  of 
  tibia. 
  

  

  * 
  In 
  southern 
  France 
  and 
  Italy 
  several 
  species 
  of 
  Pemphigella, 
  Tullgren, 
  1909, 
  have 
  been 
  

   described 
  as 
  producing 
  galls 
  on 
  Pistacia. 
  In 
  Transcaucasia 
  and 
  Turkestan 
  so 
  far 
  only 
  two 
  species 
  

   have 
  been 
  observed 
  : 
  P. 
  follicularia. 
  Pass., 
  and 
  P. 
  utncularia, 
  Derbes. 
  But 
  in 
  the 
  remaining 
  

   forms, 
  with 
  the 
  exception 
  of 
  P. 
  follicularia, 
  migrantes 
  have 
  not 
  been 
  bred 
  on 
  roots 
  of 
  plants. 
  

   J 
  Lichtenstein 
  found 
  that 
  Aploneura 
  lentisci 
  migrates 
  to 
  roots 
  of 
  Graminaceae 
  r 
  Hordt 
  urn 
  : 
  ulgare. 
  

   Browns 
  mollis), 
  but 
  he 
  did 
  not 
  give 
  a 
  description 
  of 
  the 
  apterous 
  viviparous 
  22 
  which 
  develop 
  

   there 
  (C.R. 
  Acad. 
  Sc. 
  Paris, 
  lxxxvii, 
  1878, 
  pp. 
  782-7S3). 
  

  

  | 
  In 
  the 
  relative 
  lengths 
  of 
  the 
  joints 
  of 
  the 
  antennae 
  this 
  species 
  resembles 
  F. 
  hnigi, 
  Ckll. 
  

   (Psvche 
  1903) 
  ; 
  but 
  in 
  the 
  latter 
  the 
  body 
  is 
  dark 
  grevish 
  to 
  green, 
  the 
  whole 
  body 
  and 
  extremities 
  

   seld'om 
  hairy, 
  but 
  the 
  cauda 
  with 
  hairs. 
  N. 
  America 
  (Colorado) 
  ; 
  on 
  roots 
  of 
  Graminaceae 
  in 
  

   ants' 
  nests. 
  

  

  