﻿106 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol.96 
  

  

  (except 
  in 
  k/nohUis 
  and 
  aliemora) 
  and 
  -with 
  a 
  very 
  small 
  blackish 
  scale 
  

   tuft 
  in 
  the 
  excavation 
  (except 
  in 
  ignohilis) 
  ; 
  of 
  female 
  slender, 
  simple. 
  

   Front 
  of 
  male 
  head 
  deeply 
  grooved 
  to 
  hold 
  labial 
  palpi 
  ; 
  of 
  female 
  

   rounded. 
  Lal;ial 
  palpus 
  upcurved, 
  reaching 
  to 
  vertex, 
  clothed 
  with 
  

   broad 
  appressed 
  scales; 
  in 
  male 
  closely 
  appressed 
  to 
  face, 
  with 
  second 
  

   segment 
  over 
  three 
  times 
  as 
  long 
  as 
  first 
  and 
  with 
  third 
  segment 
  very 
  

   short 
  (about 
  one-sixth 
  the 
  len.gth 
  of 
  second) 
  ; 
  in 
  female 
  with 
  second 
  

   segment 
  shorter 
  and 
  third 
  about 
  one-third 
  the 
  length 
  of 
  second. 
  Max- 
  

   illary 
  palpus 
  minute. 
  Forewirig 
  smooth 
  ; 
  11 
  veins, 
  10 
  from 
  cell, 
  parallel 
  

   for 
  some 
  distance 
  but 
  not 
  approximate 
  to 
  stalk 
  of 
  8-9, 
  9 
  short, 
  6 
  from 
  

   below 
  upper 
  angle 
  of 
  cell, 
  straight, 
  4-5 
  connate 
  or 
  ajjproximate 
  at 
  base, 
  

   3 
  approximately 
  equidistant 
  from 
  4 
  and 
  2, 
  2 
  from 
  before 
  lower 
  angle 
  

   of 
  cell. 
  Hind 
  wing 
  with 
  8 
  veins, 
  7 
  and 
  8 
  closely 
  approxinuite 
  beyond 
  

   cell 
  for 
  less 
  than 
  half 
  their 
  lengths, 
  4 
  and 
  5 
  long 
  stalked, 
  3 
  from 
  stalk 
  

   of 
  4-5 
  or 
  closely 
  approximate 
  for 
  some 
  distance, 
  2 
  from 
  near 
  lower 
  

   angle 
  of 
  cell, 
  cell 
  short, 
  discocellular 
  slanting 
  and 
  slightly 
  curved; 
  in 
  

   male 
  anal 
  area, 
  involving 
  veins 
  la 
  and 
  lb, 
  thickened 
  and 
  folded 
  under 
  

   to 
  form 
  a 
  pocket 
  enclosing 
  enlarged 
  scales 
  and 
  hair 
  tufts. 
  Eighth 
  

   abdominal 
  segment 
  of 
  male 
  bearing 
  a 
  thin, 
  short 
  pair 
  of 
  ventiolaterai 
  

   hair 
  tufts. 
  

  

  Male 
  genitalia 
  with 
  uncus 
  long, 
  curved, 
  strongly 
  sclerotized, 
  con- 
  

   stricted 
  at 
  middle 
  and 
  broadly 
  divided 
  at 
  apex 
  (hammer-clawed) 
  ; 
  

   gnathos 
  terminating 
  in 
  a 
  short, 
  stout 
  hook 
  or 
  a 
  short, 
  broad 
  plate 
  

   {ahemora) 
  ; 
  harpe 
  rather 
  short, 
  with 
  clasper 
  ; 
  vinculum 
  narrow, 
  short; 
  

   aedeagus 
  stout 
  w4th 
  long, 
  stout, 
  projecting, 
  curved 
  spine 
  or 
  spines 
  

   at 
  apex 
  (except 
  in 
  argent 
  ina) 
  ; 
  cornutus 
  a 
  single, 
  strong 
  spine. 
  

  

  Female 
  genitalia 
  without 
  signum 
  {jyellucens) 
  or 
  with 
  signum 
  well 
  

   developed 
  and 
  consisting 
  of 
  a 
  large 
  oval 
  or 
  pear-shaped 
  cluster 
  of 
  

   thornlike 
  spines 
  {^argentina^ 
  agapella), 
  or 
  curved 
  sclerotized 
  bands 
  

   armed 
  with 
  stout, 
  thornlike 
  spines 
  {ahemora^ 
  ignohilis) 
  ; 
  bursa 
  large; 
  

   ductus 
  bursae 
  short, 
  broad 
  (narrowest 
  in 
  agdfeUa) 
  ; 
  area 
  surround- 
  

   ing 
  genital 
  opening 
  strongly 
  sclerotized, 
  the 
  dorsal 
  sclerotization 
  in 
  

   the 
  form 
  of 
  a 
  band 
  connected 
  with 
  the 
  supporting 
  rods 
  of 
  eighth 
  

   segment 
  collar, 
  and 
  armed 
  with 
  two 
  or 
  four 
  spinelike 
  projections 
  

   (except 
  in 
  ignohilis 
  and 
  some 
  examples 
  of 
  argentlna) 
  ; 
  ductus 
  semi- 
  

   nalis 
  from 
  caudal 
  area 
  of 
  bursa. 
  

  

  This 
  genus 
  is 
  easily 
  distinguished 
  by 
  its 
  striking 
  male 
  characters: 
  

   the 
  strongly 
  sclerotized, 
  long-stemmed, 
  bifurcate 
  (hammer-clawed) 
  

   uncus; 
  the 
  large 
  pocket 
  on 
  anal 
  area 
  of 
  hind 
  wing; 
  the 
  long, 
  embedded 
  

   labial 
  palpus 
  with 
  very 
  short 
  third 
  segment; 
  and 
  minute 
  maxillary 
  

   palpus. 
  A 
  similar 
  bifurcate 
  uncus 
  is 
  not 
  found 
  in 
  any 
  other 
  Ameri- 
  

   can 
  genus 
  except 
  Defundella 
  Dyar. 
  In 
  the 
  type 
  species 
  of 
  the 
  latter 
  

   {corynophora 
  Dyar) 
  the 
  uncus 
  is 
  somewhat 
  produced 
  and 
  exhibits 
  a 
  

   slight 
  bifurcation 
  at 
  apex; 
  but 
  other 
  species, 
  which 
  must 
  also 
  be 
  

  

  