125 
edge  of  the  eyes  and  below  it,  clothed  more 
densely  with  black  hairs.  Distinct  ocellar 
area  with  three  yellowish  ocelli,  almost  bare 
and  prolonged  to  the  fissure  of  the  ptilinum 
in  a  bare  longitudinal  line.  Antennal  groove, 
bare,  shiny,  with  distinct  keel.  Vibrissal  ridge 
with  dense  tufts  almost  forming  a  mousta¬ 
che,  at  the  slightlv  prominent  edge  of  the 
mouth.  Lunula  excavated,  antennae  short, 
the  second  article  only  a  little  longer  than 
the  first,  the  three  together  forming  a  curve 
with  internal  concavity.  Arista  bare,  rather 
long  and  slender,  with  elongate  thickening 
limited  to  the  base:  the  second  article  short 
Cheeks  broad,  shining  with  few  scattered 
hairs,  of  the  same  height  as  the  eyes,  with 
longer  hairs  only  at  the  posterior  margin. 
Rudiment  of  proboscis  distinctly  black  and 
hairy. 
Wings  longer  than  the  abdomen  and  cove¬ 
ring  it  in  repose;  entirely  blue  black,  but  for 
the  anterior  margin  at  the  apex,  from  the 
ends  of  the  second  and  third  vein  and  along 
the  apical  transverse  vein  where  it  is 
brownish  hyaline.  Alulae  rather  large,  blue 
black;  squamae  brown  black;  halteres  black, 
small  trasverse  vein  oblique,  anterior  to  the  end 
of  the  auxiliary  vein.  Apical  transverse  vein 
first  forming  a  right  angle  at  the  bend,  af¬ 
terwards  nearly  straight,  the  bend  with  a 
fold  but  without  an  appendix.  Legs  strong, 
tibiae  somewhat  bent  and  base  of  the  hind 
femora  somewhat  thickened,  with  short  and 
dense  pile;  only  the  base  of  the  hind  femora 
with  dense  tufts  of  longer  hairs  and  on 
the  hind  tibiae  a  brush  of  longer  hairs  which 
occupies  the  whole  dorsal  side,  excepting 
the  basal  fourth.  The  last  four  tarsi  some¬ 
what  dilated,  chiefly  the  1st  and  2d  pair; 
the  first  tarsus  of  hindlegs  nearly  twice  as 
long  as  the  second.  Ungues  and  pulvilli  large 
and  strong.  Abdomen  with  dense  black  pile, 
the  apical  edges  of  the  segments  with  more 
scattered  hairs,  very  shiny;  the  shiny  part 
extends  the  middle,  so  as  to  form  a  longi¬ 
tudinal  design,  but  des  not  show  the  triangles 
seen  in  C.  trigonophora.  The  hvpopygium 
small  and  depressed,  shut  in  a  circular  pit 
in  front  of  the  sharp  edge  of  the  preceeding 
segment;  it  seems  formed  by  two  or  more 
telescoped  rings,  which  may  be  somewhat 
extruded  downwards  or  slightly  forwards 
(?)  and  be  enclosed  by  the  rim  of  the  fourth 
ring.  Looking  at  the  head  from  below,  one 
sees  the  groove  of  the  proboscis,  beginning 
behind  the  angle  of  the  vibrissae,  as  a  furrow, 
enlarged  backwards  so  as  to  form  a  deep 
oval  pit,  in  the  middle  of  which  the  rudi¬ 
mentary  proboscis  sticks  out.  .  .  No  palpi 
are  found. 
Length  of  body  18  mm,  including  the 
folded  wings  22  mm. 
Length  of  wing  16  mm. 
Espirito  Santo,  Brazil. 
The  specimen  shown  in  the  figure  was 
caught  on  Dec.  1st  1908  by  Mr.  FOET- 
TERLE  in  Petropolis.  It  is  undoubtedly 
R.  dasypoda  BRAUER. 
11.  Rogenhofera  trigonophora  BRAUER. 
(Verh.  der  K.  K.  zool-  bot.  Ges.-Vien- 
na  1863). 
1  only  give  the  dimensions  and  a  trans¬ 
lation  of  the  diagnosis  from 
BRAUER’s  description  : 
“Diagnose  :  R.  atra  ;  holosericea,  thorace 
supra  atro,  ad  suturam  pilis  aureis  parum 
piloso;  abdomine  atro,  linea  dorsali  trian- 
gulis  nudis,  lucidis;  segmentorum  marginí- 
bus  pilis  aureis  cingulatis  ;  alis  nigro-fuscis, 
violaceo-micantibus. 
Width  of  vertex  3  mm.  ;  width  of  head 
7  mm.,  length  of  body  17  mm.,  length  of 
wing  14  mm.  Habitat;  Bahia,  Brazil.  Received 
from  my  friend  A.  Rogenhofer”. 
(Note:  1  have  since  received  4  speci¬ 
mens,  collected  by  Mr.  J.  Z1KÁN  in  Passa 
Quatro,  Minas.  They  agree  with  in  BRAUER’s 
description,  but  in  his  drawing  the  golden 
hairs  are  rather  too  striking.) 
III.  Genus  Pseudogametes  BISCHOF. 
The  following  extract  from  “ Anzeiger 
der  Kais.  Akademie  der  Wissenschaften ,  M ci¬ 
thern.  Nciturw.  Abth. ,  Jhrg.  XXXVII.  Wien 
1900”.  refers  to  this  genus: 
Prof.  F.  BRAUER,  presents  the  following 
