﻿26 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  G7 
  

  

  the 
  venation 
  of 
  forewing 
  different 
  from 
  that 
  of 
  the 
  other 
  species; 
  

   we 
  consider 
  this 
  species 
  entitled 
  to 
  subgeneric 
  rank. 
  The 
  mesonotum 
  

   and 
  metanotum 
  each 
  have 
  a 
  long 
  spine 
  on 
  middle 
  of 
  hind 
  margin. 
  

   The 
  male 
  hypopygium 
  is 
  of 
  the 
  form 
  shown 
  in 
  figure 
  16. 
  Fore 
  

   femur 
  spinose 
  from 
  base, 
  fore 
  tarsus 
  not 
  heavily 
  chitinized, 
  short 
  

   and 
  straight, 
  with 
  two 
  distinct 
  segments, 
  hairy 
  above 
  and 
  below; 
  

   claws 
  equal. 
  

  

  With 
  the 
  exception 
  of 
  S. 
  arizonensis 
  members 
  of 
  this 
  genus 
  are 
  

   whitish 
  to 
  stramineous 
  with 
  brown 
  to 
  black 
  markings 
  of 
  variable 
  

   extent; 
  their 
  usual 
  pale 
  coloration 
  and 
  the 
  abundance 
  of 
  long 
  hairs 
  

   on 
  most 
  parts 
  of 
  the 
  body 
  give 
  them 
  a 
  habitus 
  quite 
  distinct 
  among 
  

   American 
  genera. 
  While 
  the 
  extent 
  to 
  which 
  dark 
  markings 
  prevail 
  

   is 
  variable, 
  the 
  pattern 
  is 
  nearly 
  the 
  same 
  throughout 
  all 
  of 
  the 
  sub- 
  

   genus 
  Stenolemus. 
  The 
  principal 
  features 
  of 
  these 
  markings 
  are 
  

   the 
  following 
  : 
  Bands 
  differing 
  in 
  number, 
  width 
  and 
  intensity, 
  and 
  

   sometimes 
  in 
  character 
  of 
  pubescence, 
  and 
  even 
  of 
  the 
  supporting 
  

   integument, 
  on 
  antennae 
  and 
  legs; 
  two 
  longitudinal 
  vittae 
  on 
  top 
  

   of 
  anterior 
  lobe 
  of 
  head; 
  a 
  band 
  on 
  each 
  side 
  of 
  head 
  from 
  neck 
  

   toward 
  eyes 
  dividing 
  so 
  as 
  to 
  leave 
  the 
  tubercles 
  and 
  a 
  spot 
  behind 
  

   each 
  eye 
  pale; 
  on 
  prothorax 
  a 
  stripe 
  nearly 
  percurrent 
  on 
  lower 
  

   surface, 
  embracing 
  most 
  of 
  pedicel, 
  and 
  sending 
  a 
  tongue 
  posteriorly 
  

   along 
  side 
  of 
  posterior 
  lobe, 
  and 
  anteriorly 
  a 
  band 
  above 
  front 
  coxa, 
  

   and 
  a 
  broad 
  vitta 
  each 
  side 
  of 
  the 
  median 
  line 
  on 
  dorsum, 
  these 
  

   latter 
  vittae 
  interrupted 
  by 
  one 
  or 
  two 
  pale 
  stripes 
  on 
  outer 
  side 
  

   near 
  base 
  ; 
  mesothorax 
  and 
  metathorax 
  largely 
  dark, 
  with 
  pale 
  edg- 
  

   ings, 
  and 
  abdomen 
  the 
  same, 
  more 
  or 
  less 
  marked 
  with 
  pale. 
  In 
  

   most 
  cases 
  we 
  have 
  figured 
  the 
  forewings 
  in 
  order 
  to 
  give 
  a 
  clearer 
  

   idea 
  of 
  their 
  markings. 
  

  

  KEY 
  TO 
  THE 
  SUBGENERA 
  AND 
  SPECIES. 
  

  

  1. 
  A 
  distinct 
  vein 
  emitted 
  from 
  costal 
  margin 
  of 
  basal 
  discal 
  cell 
  of 
  forewing 
  

  

  (figs. 
  21, 
  23, 
  26, 
  29) 
  (Subgenus 
  Stenolemus) 
  2 
  

  

  No 
  vein 
  emitted 
  from 
  costal 
  margin 
  of 
  basal 
  discal 
  cell 
  of 
  forewing 
  (fig. 
  14) 
  ; 
  

   basal 
  stout 
  spine 
  on 
  posteroventral 
  surface 
  of 
  fore 
  femur 
  directed 
  down- 
  

   ward, 
  not 
  angling 
  towards 
  base 
  of 
  femur; 
  prothorax 
  hardly 
  pedunculate, 
  

   anterior 
  lobe 
  gradually 
  narrowed 
  posteriorly, 
  posterior 
  lobe 
  without 
  tu- 
  

   bercles 
  on 
  posterior 
  margin 
  ; 
  dorsum 
  of 
  head 
  without 
  post-sutural 
  tubercles. 
  

   Subgenus 
  Stenolemoides, 
  new 
  subgenus, 
  type 
  species, 
  Luteva 
  arizonensis 
  

   Banks 
  (p. 
  28). 
  

  

  2. 
  Basal 
  spine 
  of 
  fore 
  femur 
  directed 
  straight 
  downward, 
  not 
  angling 
  towards 
  

  

  base 
  of 
  femur 
  ; 
  prothorax 
  deeply 
  constricted 
  but 
  not 
  pedunculate, 
  anterior 
  

   lobe 
  quadrate, 
  posterior 
  lobe 
  with 
  four 
  distinct 
  tubercles 
  near 
  hind 
  margin 
  ; 
  

   subapical 
  antennal 
  segment 
  longer 
  than 
  apical; 
  fore 
  tibia 
  stout 
  (fig. 
  17), 
  

   barely 
  longer 
  than 
  fore 
  coxa 
  and 
  hardly 
  as 
  long 
  as 
  head 
  and 
  interior 
  lobe 
  

   of 
  prothorax 
  combined 
  ; 
  mesothoracic 
  and 
  metathoracic 
  spines 
  short 
  and 
  

  

  stout, 
  tapered 
  apically 
  pristinus, 
  new 
  species 
  (p. 
  23). 
  

  

  Basal 
  spine 
  of 
  fore 
  femur 
  angling 
  towards 
  base 
  of 
  femur 
  3 
  

  

  