﻿362 
  PROCEEDiyOS 
  of 
  the 
  XATIOXAL 
  museum. 
  vol.44. 
  

  

  and 
  hidden, 
  the 
  abdomen 
  oval 
  in 
  outline, 
  first 
  (visible) 
  segment 
  very 
  

   slightly 
  longer 
  than 
  second, 
  next 
  three 
  subequaJ, 
  last 
  visible 
  segment 
  

   veiy 
  sliort, 
  all 
  segments 
  very 
  finely 
  granulose 
  and 
  with 
  regularly 
  dis- 
  

   tributed 
  short 
  dark 
  hairs; 
  anal 
  organs 
  yellowish; 
  legs 
  black, 
  tro- 
  

   chanters, 
  extreme 
  apices 
  of 
  femora, 
  bases 
  and 
  apices 
  of 
  tibiae, 
  and 
  all 
  

   tarsi 
  yellow, 
  all 
  legs 
  with 
  numerous 
  short 
  hairs, 
  fore 
  femora 
  with 
  a 
  

   row 
  of 
  about 
  seven 
  hairlike 
  bristles 
  on 
  postero-ventral 
  surface 
  which 
  

   increase 
  in 
  length 
  from 
  base 
  to 
  tip, 
  mid 
  femora 
  with 
  a 
  serial 
  row 
  of 
  

   short 
  close 
  bristles 
  on 
  the 
  antero-dorsal 
  surface, 
  the 
  last 
  two 
  at 
  near 
  

   tip 
  much 
  the 
  strongest, 
  hairs 
  on 
  mid 
  tibiae 
  almost 
  bristlelike, 
  one 
  

   bristle 
  at 
  apical 
  fourth 
  on 
  dorsal 
  surface, 
  apical 
  spines 
  weak, 
  hind 
  

   femora 
  and 
  tibiae 
  without 
  any 
  strong 
  bristles, 
  basal 
  joint 
  of 
  hind 
  tarsi 
  

   distinctly 
  dilated, 
  covered 
  with 
  short 
  stiff 
  golden 
  hairs 
  on 
  ventral 
  sur- 
  

   face, 
  entire 
  tarsus 
  almost 
  equal 
  in 
  length 
  to 
  tibia. 
  

  

  Length, 
  1 
  1 
  mm. 
  

  

  Type.— 
  Cut. 
  No. 
  14945, 
  U.S.N.M. 
  

  

  Two 
  females, 
  Farragut 
  Bay, 
  Alaska, 
  May 
  6, 
  1899. 
  (T. 
  Kincaid, 
  

   Harriman 
  Alaska 
  Exp.) 
  

  

  This 
  species 
  was 
  recorded 
  by 
  Coquillett 
  as 
  A. 
  politus 
  Williston, 
  

   which 
  differs 
  as 
  follows: 
  Head 
  comparatively 
  broader, 
  frons 
  glossy 
  

   black, 
  anteriorly 
  much 
  produced 
  centrally, 
  arista 
  more 
  tapering 
  and 
  

   less 
  distinctly 
  pubescent, 
  face 
  glossy, 
  cheeks 
  granulose, 
  much 
  higher 
  

   than 
  in 
  horealis, 
  head 
  from 
  anterior 
  edge 
  of 
  eyes 
  viewed 
  from 
  above 
  

   about 
  one-half 
  as 
  long 
  as 
  thorax, 
  in 
  horealis 
  about 
  two-thirds, 
  meso- 
  

   notum 
  granulose, 
  distinctly 
  broader 
  posteriorly 
  than 
  at 
  anterior 
  

   margin, 
  scutellum 
  more 
  nearly 
  subtriangular, 
  at 
  least 
  one-half 
  as 
  long 
  

   as 
  mesonotum, 
  abdomen 
  glossy 
  black, 
  much 
  more 
  coarsel}'' 
  granulose 
  

   than 
  in 
  horealis, 
  the 
  first 
  visible 
  segment 
  distmctly 
  longer 
  than 
  second, 
  

   the 
  hairs 
  on 
  surface 
  much 
  more 
  sparse 
  than 
  in 
  horealis, 
  especially 
  on 
  

   basal 
  two 
  segments, 
  the 
  legs 
  are 
  bristled 
  similar 
  to 
  those 
  of 
  horealis, 
  

   but 
  they 
  are 
  much 
  darker 
  in 
  color 
  in 
  the 
  female, 
  

  

  A 
  male 
  specimen 
  of 
  Aptilotus 
  politus 
  from 
  Panamint 
  Mountains, 
  the 
  

   type-locality, 
  which 
  is 
  evidently 
  one 
  of 
  the 
  lot 
  taken 
  Jpy 
  Koebele, 
  as 
  

   it 
  bears 
  his 
  label, 
  differs 
  from 
  the 
  female 
  in 
  having 
  the 
  frons 
  as 
  long 
  

   as 
  broad, 
  regularly 
  rounded 
  and 
  pale 
  in 
  front, 
  the 
  thorax 
  not 
  so 
  dis- 
  

   tinctly 
  broadened 
  behind, 
  the 
  scutellum 
  rather 
  shorter, 
  and 
  the 
  legs 
  

   colored 
  as 
  in 
  horealis. 
  The 
  hypopygium 
  is 
  large, 
  longer 
  on 
  right 
  side 
  

   than 
  on 
  left, 
  glossy 
  black, 
  and 
  with 
  numerous 
  short 
  black 
  hairs 
  on 
  the 
  

   surface. 
  There 
  is 
  also 
  on 
  the 
  mid 
  tibiae 
  an 
  additional 
  preapical 
  

   bristle, 
  transversely 
  situated 
  to 
  the 
  one 
  in 
  the 
  female. 
  The 
  species 
  

   was 
  briefly 
  described 
  from 
  the 
  female 
  only, 
  and 
  though 
  this 
  example 
  

   varies 
  from 
  that 
  sex 
  in 
  several 
  respects, 
  I 
  believe 
  it 
  belongs 
  to 
  politus 
  

   and 
  is 
  not 
  a 
  distinct 
  species. 
  The 
  question 
  is 
  one 
  which 
  can 
  only 
  be 
  

   settled 
  by 
  obtaining 
  sufficient 
  material 
  to 
  afford 
  an 
  opportunity 
  for 
  

   comparison 
  of 
  the 
  sexes. 
  Unfortunately 
  the 
  tj^pe-speciniens 
  are 
  not 
  

  

  