﻿76 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL, 
  MUSEUM 
  vol. 
  67 
  

  

  KEY 
  TO 
  THE 
  SPECIES. 
  

  

  Males. 
  

  

  1. 
  Hind 
  margin 
  of 
  hypopygiuin 
  without 
  median 
  process, 
  nearly 
  straight 
  across. 
  

  

  manni, 
  new 
  species 
  (p. 
  83). 
  

   Hind 
  margin 
  of 
  hypopygium 
  with 
  a 
  median 
  process, 
  sometimes 
  partly 
  con- 
  

   cealed 
  by 
  the 
  claspers 
  2 
  

  

  2. 
  Hind 
  margin 
  of 
  hypopgyium 
  nearly 
  straight 
  across, 
  bearing 
  on 
  its 
  inner 
  

  

  side 
  a 
  process 
  which 
  extends 
  upward 
  and 
  forward 
  between 
  (and 
  usually 
  

  

  concealed 
  by) 
  apices 
  of 
  claspers 
  (fig. 
  121) 
  3 
  

  

  Hind 
  margin 
  of 
  hypopygium 
  produced, 
  in 
  the 
  plane 
  of 
  its 
  outer 
  surface, 
  into 
  

   a 
  process 
  which 
  is 
  not 
  concealed 
  between 
  apices 
  of 
  claspers 
  4 
  

  

  3. 
  Clasper 
  broadly 
  concave 
  on 
  upper 
  margin, 
  swollen 
  at 
  base 
  and 
  expanded 
  on 
  

  

  inner 
  side 
  toward 
  apex 
  into 
  a 
  triangular 
  lobe 
  (fig. 
  133), 
  not 
  hairy. 
  

  

  pollex, 
  new 
  species 
  (p. 
  82). 
  

   Clasper 
  convex 
  on 
  upper 
  margin, 
  neither 
  swollen 
  at 
  base 
  nor 
  expanded 
  lat- 
  

   erally 
  toward 
  apex, 
  hairy, 
  the 
  hairs 
  on 
  inner 
  surface 
  long 
  and 
  erect 
  (fig. 
  

   122) 
  brevipennis 
  (Say) 
  (p. 
  78). 
  

  

  4. 
  Process 
  tapering 
  gradually 
  from 
  base, 
  slender 
  and 
  pointed, 
  a 
  little 
  recurved 
  

  

  apically 
  ; 
  clasper 
  nearly 
  terete, 
  strongly 
  curved 
  and 
  somewhat 
  bulbous 
  api- 
  

   cally 
  (figs. 
  130-131) 
  apiculata, 
  new 
  species 
  (p. 
  SI). 
  

  

  Process 
  notched 
  on 
  the 
  sides 
  at 
  base, 
  broadly 
  expanding 
  apically, 
  with 
  a 
  

   terminal 
  notch 
  ; 
  clasper 
  nearly 
  straight, 
  curved 
  only 
  near 
  apex 
  which 
  is 
  not 
  

   bulbous 
  (figs. 
  118,119, 
  120) 
  incisa, 
  new 
  species 
  (p. 
  78). 
  

  

  Females. 
  

  

  1. 
  Eighth 
  tergite 
  with 
  the 
  lateral 
  angles 
  produced 
  considerably 
  beyond 
  middle 
  

  

  of 
  hind 
  margin 
  (fig. 
  123) 
  2 
  

  

  Eighth 
  tergite 
  with 
  the 
  lateral 
  angles 
  produced 
  no 
  farther 
  than 
  middle 
  of 
  

   hind 
  margin, 
  or 
  rounded 
  (figs. 
  129, 
  131a) 
  5 
  

  

  2. 
  Seventh 
  tergite 
  with 
  a 
  pair 
  of 
  divergent 
  carinae 
  bounding 
  disk, 
  within 
  and 
  

  

  distinct 
  from 
  the 
  ridges 
  which 
  divide 
  the 
  upper 
  surface 
  from 
  the 
  down- 
  

   folded 
  lateral 
  portions 
  of 
  the 
  tergite 
  11 
  (fig. 
  116) 
  3 
  

  

  Seventh 
  tergite 
  without 
  such 
  carinae 
  4 
  

  

  3. 
  Fore 
  femur 
  about 
  7.5 
  mm. 
  long; 
  fore 
  coxa 
  hardly 
  twice 
  as 
  long 
  as 
  head. 
  

  

  brevicoxa 
  (Banks) 
  (p. 
  77). 
  

   Fore 
  femur 
  about 
  9 
  mm. 
  long; 
  fore 
  coxa 
  fully 
  twice 
  as 
  long 
  as 
  head. 
  

  

  banksi, 
  new 
  species 
  (p. 
  77). 
  

  

  4. 
  Hind 
  margin 
  of 
  eighth 
  tergite 
  between 
  the 
  processes 
  decidedly 
  concave, 
  the 
  

  

  emargination 
  broadly 
  U-shaped 
  ; 
  seventh 
  and 
  eighth 
  tergites 
  with 
  a 
  me- 
  

   dian 
  longitudinal 
  bare 
  and 
  slightly 
  elevated 
  line 
  (fig. 
  127) 
  ; 
  side 
  of 
  eighth 
  

  

  tergite 
  subangulate 
  posteriorly 
  lineata, 
  new 
  species 
  (p. 
  81). 
  

  

  Hind 
  margin 
  of 
  eighth 
  tergite 
  between 
  the 
  processes 
  nearly 
  straight, 
  the 
  

   emargination 
  nearly 
  rectangular 
  (fig. 
  123) 
  ; 
  seventh 
  and 
  eighth 
  tergites 
  

   lacking 
  such 
  a 
  line; 
  side 
  of 
  eighth 
  tergite 
  not 
  at 
  all 
  angulate 
  posteriorly 
  

   (fig. 
  124) 
  brevipennis 
  (Say) 
  (p. 
  78). 
  

  

  5. 
  Hind 
  margin 
  of 
  eighth 
  tergite 
  bisinuate, 
  the 
  lateral 
  angles 
  and 
  median 
  point 
  

  

  about 
  equally 
  produced 
  (fig. 
  129) 
  modica, 
  new 
  species 
  (p. 
  81). 
  

  

  Hind 
  margin 
  of 
  eighth 
  tergite 
  with 
  the 
  lateral 
  angles 
  rounded 
  and 
  the 
  median 
  

   portion 
  apiculate 
  or 
  much 
  produced 
  6 
  

  

  11 
  In 
  partially 
  collapsed 
  or 
  distorted 
  specimens, 
  the 
  seventh 
  tergite 
  is 
  prone 
  to 
  fold 
  

   along 
  the 
  lines 
  of 
  the 
  lateral 
  and 
  central 
  carinae 
  ; 
  these 
  accidental 
  and 
  usually 
  unsym- 
  

   metrical 
  folds 
  must 
  not 
  be 
  mistaken 
  for 
  the 
  true 
  carinae 
  which 
  are 
  clear-cut 
  and 
  sym- 
  

   metrical. 
  

  

  