﻿8 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  67 
  

  

  Alate 
  viviparous 
  female. 
  — 
  The 
  antennal 
  segments 
  are 
  as 
  follows: 
  

  

  The 
  sensoria 
  of 
  segment 
  III 
  are 
  tuberculate 
  and 
  evenly 
  distributed 
  

   throughout 
  nearly 
  the 
  entire 
  length. 
  Other 
  segments 
  without 
  sec- 
  

   ondary 
  sensoria. 
  VI 
  with 
  a 
  group 
  of 
  six 
  small 
  sensoria 
  adjacent 
  to 
  

   the 
  larger 
  one. 
  IV 
  and 
  V 
  faintly 
  imbricated, 
  V 
  more 
  distinctly 
  so 
  

   toward 
  the 
  tip. 
  I 
  slightly 
  gibbous 
  on 
  inner 
  side. 
  Head 
  0.608 
  mm. 
  

   wide 
  through 
  the 
  eyes. 
  Antennal 
  tubercles 
  fairly 
  prominent. 
  Beak 
  

   reaching 
  nearly 
  to 
  second 
  coxae. 
  Cornicles 
  0.624 
  mm. 
  long, 
  distinctly 
  

   reticulate 
  for 
  a 
  distance 
  of 
  0.16 
  mm.; 
  largest 
  diameter, 
  0.088 
  mm.; 
  

   smallest 
  diameter, 
  0.064 
  mm. 
  ; 
  flange, 
  0.08 
  mm. 
  The 
  cauda 
  is 
  twisted 
  

   in 
  our 
  specimen, 
  but 
  Van 
  der 
  Goot 
  states 
  that 
  it 
  is 
  of 
  the 
  same 
  length 
  

   as 
  the 
  cornicles. 
  There 
  appears 
  to 
  be 
  two 
  sets 
  of 
  lateral 
  hairs. 
  

   Spiracles 
  and 
  hairs 
  of 
  abdomen 
  as 
  shown 
  in 
  figure 
  172. 
  

  

  Apterous 
  viviparous 
  female. 
  — 
  The 
  only 
  specimen 
  we 
  have 
  is 
  in 
  very 
  

   poor 
  condition. 
  The 
  single 
  antenna 
  present 
  is 
  slightly 
  longer 
  than 
  

   the 
  body, 
  the 
  segments 
  being 
  as 
  follows 
  : 
  

  

  The 
  third 
  segment 
  has 
  about 
  25 
  sensoria 
  scattered 
  over 
  nearly 
  the 
  

   entire 
  length. 
  The 
  head 
  is 
  0.608 
  mm. 
  wide 
  through 
  the 
  eyes. 
  The 
  

   antennal 
  tubercles 
  are 
  distinct. 
  

  

  The 
  beak 
  reaches 
  almost 
  to 
  the 
  third 
  coxae. 
  The 
  one 
  cornicle 
  

   which 
  is 
  present 
  is 
  0.64 
  mm. 
  long, 
  being 
  distinctly 
  reticulated 
  for 
  a 
  

   distance 
  of 
  0.128 
  mm.; 
  widest 
  diameter, 
  0.096 
  mm.; 
  narrowest 
  diam- 
  

   eter, 
  0.064 
  mm.; 
  flange, 
  0.08 
  mm. 
  Theobald 
  says 
  they 
  are 
  variable 
  

   in 
  form, 
  some 
  being 
  almost 
  cylindrical. 
  The 
  cauda 
  is 
  twisted; 
  Van 
  

   der 
  Goot 
  says 
  that 
  it 
  is 
  of 
  the 
  same 
  length 
  as 
  the 
  cornicles. 
  His 
  

   figure 
  shows 
  it 
  to 
  be 
  broad 
  and 
  not 
  constricted. 
  

  

  Host. 
  — 
  Aconitum 
  napellus. 
  

  

  Distribution. 
  — 
  Jlolland, 
  Bergedorf 
  near 
  Hamburg, 
  Germany 
  (deter- 
  

   minations 
  verified 
  by 
  Van 
  der 
  Goot), 
  and 
  Yorkshire, 
  England. 
  

  

  Metatype. 
  — 
  Deposited 
  in 
  the 
  U. 
  S. 
  National 
  Museum. 
  

  

  