﻿xo. 
  1958. 
  ^'EW 
  SPECIES 
  OF 
  B 
  ORB 
  ORI 
  D 
  JE—M 
  ALLOC 
  E. 
  363 
  

  

  in 
  the 
  collection. 
  The 
  only 
  examples 
  here 
  are 
  a 
  female, 
  compared 
  

   with 
  horealis, 
  from 
  Beulah, 
  New 
  Mexico 
  (8,000 
  feet), 
  May 
  3 
  (Cock- 
  

   erell), 
  and 
  the 
  above-mentioned 
  male. 
  

  

  SPaEROCERA 
  ANNULICORNIS, 
  new 
  species. 
  

  

  Male. 
  — 
  Black, 
  slightly 
  sliining; 
  frons 
  opaque, 
  only 
  slightly'- 
  shining 
  

   laterally 
  on 
  posterior 
  half 
  (the 
  lateral 
  bristles 
  have 
  been 
  destroyed, 
  so 
  

   that 
  it 
  is 
  impossible 
  to 
  say 
  anythmg 
  about 
  their 
  disposition 
  on 
  frons) 
  ; 
  

   central 
  rows 
  very 
  weak, 
  pale, 
  lying 
  close 
  on 
  frons 
  and 
  strongly 
  

   incurved; 
  anterior 
  outline 
  of 
  frons 
  strongly 
  produced 
  in 
  center; 
  face 
  

   strongly 
  produced 
  between 
  and 
  below 
  antennae 
  so 
  that 
  the 
  antennae 
  

   are 
  situated 
  in 
  lateral 
  cavities; 
  labrum 
  large, 
  but 
  not 
  projecting 
  much, 
  

   except 
  downward; 
  a 
  few 
  weak, 
  pale 
  hairs 
  on 
  face 
  margms; 
  cheeks 
  

   strongly 
  rugulose, 
  sides 
  of 
  mouth-margin 
  shining, 
  antenna3 
  with 
  basal 
  

   joint 
  yellow, 
  second 
  joint 
  brown, 
  twice 
  as 
  large 
  as 
  third, 
  numerous 
  

   short 
  hairs 
  on 
  its 
  surface, 
  third 
  clear 
  yellow; 
  the 
  third 
  joint 
  sits 
  in 
  the 
  

   hollow 
  apex 
  of 
  second; 
  arista 
  one-third 
  longer 
  than 
  breadth 
  of 
  frons 
  

   at 
  center, 
  yellow, 
  bare; 
  thorax 
  slightly 
  shinmg, 
  center 
  rows 
  of 
  bristles 
  

   with 
  other 
  two 
  irregular 
  rows 
  between 
  them; 
  outer 
  dorso-central 
  rows 
  

   irregular, 
  not 
  smgle; 
  posterior 
  half 
  of 
  dorsum 
  with 
  surface 
  nearly 
  

   entirely 
  covered 
  with 
  short 
  bristles; 
  scutellum 
  with 
  discal 
  short 
  

   bristles, 
  the 
  posterior 
  margm 
  without 
  tubercules 
  or 
  bristles; 
  abdomen 
  

   opaque, 
  rugose, 
  longer 
  than 
  broad, 
  and 
  nearly 
  parallel-sided, 
  bare; 
  

   hypopygium 
  large, 
  strongly 
  incurved, 
  with 
  numerous 
  very 
  short 
  

   surface 
  hairs; 
  ventral 
  surface 
  of 
  abdomen 
  in 
  center 
  with 
  distinct 
  

   golden 
  pubescence; 
  legs 
  black, 
  shinmg, 
  only 
  the 
  trochanters, 
  loiee- 
  

   joints, 
  apices 
  of 
  tibiae 
  and 
  of 
  all 
  tarsi 
  yeUow; 
  aU 
  legs 
  with 
  very 
  short 
  

   hairs; 
  all 
  femora 
  thickened, 
  especially 
  the 
  fore 
  pair; 
  hmd 
  tibise 
  without 
  

   the 
  long 
  curved 
  apical 
  spur 
  present 
  in 
  subsultans, 
  with 
  only 
  two 
  short 
  

   straight 
  apical 
  bristles; 
  hind 
  tarsi 
  with 
  the 
  basal 
  joint 
  broader 
  than 
  

   tibiae, 
  longer 
  than 
  the 
  next 
  two, 
  but 
  not 
  as 
  long 
  as 
  the 
  next 
  three; 
  

   wings 
  yellowish, 
  veins 
  pale 
  brown, 
  costa 
  bare, 
  first 
  division 
  shorter 
  

   than 
  second, 
  second 
  slightly 
  shorter 
  than 
  fourth 
  and 
  rather 
  less 
  than 
  

   one-third 
  as 
  long 
  as 
  thii-d 
  ; 
  basal 
  portion 
  of 
  third 
  vem 
  slightly 
  shorter 
  

   than 
  second 
  portion 
  of 
  fourth; 
  thii'd 
  and 
  fourth 
  veins 
  gradually 
  con- 
  

   vergent 
  toward 
  tip; 
  inner 
  cross 
  vein 
  at 
  distmctly 
  beyond 
  end 
  of 
  first 
  

   vein 
  and 
  at 
  more 
  than 
  one-third 
  from 
  base 
  of 
  discal 
  cell; 
  outer 
  cross 
  

   vein 
  at 
  two 
  and 
  one-half 
  times 
  its 
  own 
  length 
  from 
  margin 
  of 
  wing 
  

   measuring 
  along 
  fifth; 
  fifth 
  vein 
  reaching 
  four-fifths 
  to 
  margin 
  of 
  

   mng; 
  halteres 
  with 
  stalk 
  yellow 
  and 
  knob 
  bright 
  lemon 
  colored. 
  

  

  Length, 
  4 
  mm. 
  

  

  Type.— 
  Cat. 
  No. 
  14946, 
  U.S.N.M. 
  

  

  One 
  male, 
  Brookline, 
  Massachusetts, 
  March 
  20, 
  1874 
  (collection 
  of 
  

   C. 
  V. 
  Riley). 
  

  

  Easily 
  separated 
  from 
  the 
  other 
  American 
  species. 
  From 
  pusilla 
  

   Fallen 
  by 
  its 
  larger 
  size 
  and 
  the 
  absence 
  of 
  the 
  scuteUar 
  tubercules 
  as 
  

  

  