﻿90 
  PKOCEEDINQS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  C7 
  

  

  It 
  is 
  only 
  by 
  assumption 
  that 
  this 
  species 
  has 
  been 
  identified 
  with 
  

   that 
  described 
  by 
  Say. 
  The 
  original 
  description 
  is 
  very 
  inadequate, 
  

   and 
  the 
  few 
  tangible 
  characters 
  mentioned 
  in 
  it 
  do 
  not 
  apply 
  well 
  

   to 
  the 
  present 
  species. 
  It 
  would 
  be 
  no 
  injustice 
  to 
  drop 
  Say's 
  name, 
  

   as 
  unidentifiable. 
  

  

  Genus 
  GHILIANELLA 
  Spinola. 
  

  

  Ghilianella 
  Spinola, 
  M. 
  Di 
  alcuni 
  Generi 
  d'Insetti 
  Artroidignati 
  nuovamente 
  

   proposti 
  dal 
  Socio 
  Attuale 
  Signor 
  Marcbese 
  Massimiliano 
  Spinola 
  nella 
  sua 
  

   Tavola 
  Sinottica 
  di 
  questo 
  Ordine. 
  Meinorie 
  di 
  Matematica 
  e 
  di 
  Fisica 
  del 
  la 
  

   Societa 
  Italiana 
  delle 
  Scienze 
  residente 
  in 
  Modena, 
  vol. 
  25, 
  pt. 
  1, 
  1852, 
  pp. 
  

   142-143. 
  Monobasic: 
  Genotype, 
  G. 
  fiUventris, 
  new 
  species 
  [Para]. 
  

  

  The 
  inclusion 
  and 
  brief 
  definition 
  of 
  Ghilianella 
  in 
  the 
  Tavola 
  

   Sinottica 
  (p. 
  85) 
  of 
  the 
  same 
  work, 
  is 
  responsible 
  for 
  citation 
  of 
  

   that 
  reference 
  as 
  the 
  original 
  description 
  of 
  the 
  genus. 
  However, 
  

   we 
  prefer 
  the 
  reference 
  here 
  given 
  where 
  the 
  genus 
  and 
  its 
  genotype 
  

   are 
  described 
  at 
  length. 
  

  

  Characters 
  of 
  the 
  genus 
  besides 
  those 
  mentioned 
  in 
  the 
  key 
  to 
  

   genera 
  are: 
  the 
  presence 
  between 
  bases 
  of 
  antennae 
  of 
  a 
  projection 
  

   varying 
  from 
  a 
  mere 
  wart 
  to 
  a 
  prominent 
  porrect 
  or 
  decurved 
  spine 
  

   (fig. 
  165) 
  ; 
  head 
  and 
  thorax 
  more 
  or 
  less 
  granulate, 
  the 
  former 
  with 
  

   a 
  profound 
  constriction 
  anterior 
  of 
  eyes; 
  meso- 
  and 
  meta-thorax 
  

   each 
  tricarinate 
  (or 
  with 
  a 
  median 
  carina 
  and 
  lateral 
  rows 
  of 
  tu- 
  

   bercles 
  above) 
  and 
  usually 
  unicarinate 
  below; 
  abdomen 
  more 
  or 
  

   less 
  carinate 
  or 
  keeled 
  below 
  ; 
  front 
  tibia 
  with 
  a 
  patch 
  of 
  short 
  pale 
  

   golden 
  hairs 
  on 
  inner 
  side 
  apically 
  and 
  a 
  tuft 
  of 
  longer 
  ones 
  at 
  the 
  

   apex 
  inferiorly; 
  mid 
  and 
  hind 
  legs 
  and 
  antennae 
  each 
  longer 
  than 
  

   body. 
  Color 
  varies 
  much 
  according 
  to 
  age, 
  usually 
  the 
  nymphs 
  are 
  

   pale 
  and 
  the 
  color 
  darkens 
  steadily 
  with 
  age 
  until 
  the 
  final 
  stage 
  is 
  

   dark 
  reddish 
  brown 
  or 
  even 
  blackish; 
  in 
  some 
  species, 
  however, 
  the 
  

   adults 
  are 
  pale; 
  when 
  the 
  legs 
  have 
  pale 
  markings 
  they 
  are 
  almost 
  

   invariably 
  as 
  follows: 
  mid 
  and 
  hind 
  femora 
  with 
  two 
  postmedian 
  

   bands 
  and 
  a 
  subapical 
  spot, 
  and 
  tibiae 
  with 
  a 
  sub-basal 
  spot; 
  in 
  the 
  

   pale 
  species, 
  dark 
  markings 
  tend 
  to 
  appear 
  at 
  these 
  same 
  places; 
  

   frontal 
  and 
  femoral 
  spines 
  mostly 
  pale. 
  The 
  whole 
  head 
  and 
  body 
  

   of 
  Ghilianella 
  species 
  are 
  sparsely 
  pale 
  haired, 
  the 
  hair 
  tending 
  

   to 
  aggregate 
  in 
  patches 
  about 
  base 
  of 
  frontal 
  spine, 
  juncture 
  of 
  

   head 
  and 
  pronotum, 
  and 
  on 
  sides 
  anteriorly 
  of 
  meso- 
  and 
  meta- 
  

   thoraces. 
  

  

  The 
  principal 
  characters 
  for 
  separating 
  the 
  species 
  are 
  derived 
  

   from 
  the 
  terminal 
  segments 
  of 
  the 
  abdomen 
  and 
  are 
  rarely 
  men- 
  

   tioned 
  in 
  previous 
  descriptions. 
  We 
  have 
  had 
  little 
  success 
  therefore 
  

   in 
  identifying 
  described 
  species 
  of 
  which 
  we 
  have 
  not 
  seen 
  specimens. 
  

   Precise 
  determination 
  of 
  these 
  species 
  depends 
  upon 
  examination 
  

   of 
  the 
  types 
  practically 
  all 
  of 
  which 
  are 
  in 
  Europe. 
  We 
  have 
  fortu- 
  

  

  