127 
bably  a  male,  seems  to  be  the  only  one  in 
dipterological  collections;  it  may  have  been 
gathered  by  Dr.  LUND  near  Rio  de  Janeiro, 
where  he  was  in  1S26.  This  species  seems 
to  be  rare,  as  my  now  numerous  specimens 
took  many  years  to  collect  and  were  all  found 
in  the  same  place,  except  one  male  from 
Alegre  in  Espirito  Santo. 
WIEDEMANN’S  description  leaves  no 
room  for  doubt  about  the  identity  of  my 
specimens  nor  does  it  call  for  further  parti¬ 
culars.  The  rarely  seen  females  are  larger, 
with  broader  abdomen,  darker  wings  and  the 
colored  hairs  less  reddish  and  more  yellow. 
This  species  is  well  illustrated  in  one 
of  the  plates  accompanying  our  article. 
It  was  discovered  in  Petropolis  by  Mr. 
FOETTERLE,  who  makes  a  special  study 
of  Lepidoptera.  Over  a  hundred  specimens, 
almost  all  males,  were  collected  in  severalyears  ; 
with  only  two  or  three  exceptions,  they  all 
occupied  the  same  small  section  of  the  trunk 
ot  the  same  tree,  3-4  meters  from  the  g?ound. 
They  were  found  in  the  summer  months 
only  and  chiefly  in  February.  The  first  ap¬ 
peared  almost  exactly  at  9  o’clock  in  the 
morning;  they  settled  on  the  bark  remaining 
there  for  hours  on  stretch  and  were  almost 
always  solitary,  never  in  large  numbers. 
The  whole  aspect  of  the  voluminous 
body  of  Pseudogametes  is  so  ike  that  of  the 
american  Oestrinae,  specially  of  Rogenhofera 
that  most  dipterologists  who  examined  them 
did  not  hesitate  to  consider  them  as  such. 
Only  WIEDEMANN,  who  hardly  knew  this 
group,  used  the  word  Musca ,  while  TOWNS¬ 
END  considers  it  allied  to  Mesembrina. 
Though  it  is  hardly  likely  that  P.  semiater  is 
a  parasite  of  Vertebrates,  I  believe,  that,  for 
the  time  being  at  any  rate,  it  should  be 
classed  with  the  Oestrinae  of  which  it 
may  be  a  more  primitive  form,  likely  to 
supply  interesting  philogenetic  indications. 
IV.  Genus  Dermatobia. 
Dermatcbia  was  separated  from  Cutere- 
bra  by  BRAUER  in  1860.  The  former  seems 
to  consist  of  only  one  species  which  for  the 
sake  of  priority  ought  to  be  called  D.  homi- 
nis  (SAY),  though  cyaniventris  (MACQ.  1843) 
and  noxialis  (GOUDOT  1845)  are  better 
known  names.  I  will  only  make  a  few  remarks 
about  it  as  it  has  already  supplied  enough 
matter  for  publication.  The  drawings  contained 
in  them  are  not  quite  satisfactory,  therefore 
I  also  give  a  new  one. 
The  specific  characteristics  coincide  with 
the  generic  ones;  I  give  a  synopsis  of  the 
most  evident.  “Size  small  as  in  Calliphora. 
Wings  hyaline,  with  slightly  developed 
lobules.  Legs  slender  and  bare  with  less 
broad  tarsi.  Scutum  not  metallic,  striated.  Ab¬ 
domen  bare,  metallic  blue”. 
BRAUER  gives  a  very  minutions  descrip¬ 
tion  of  this  genus  and  BAU  a  more  con¬ 
densed  version  of  it.  Follows  a  translation 
of  the  latter,  with  a  few  additions  of  my  own 
in  brackets:”  Head  broader  than  thorax,  he¬ 
mispherical.  Eves  small.  Frons  broad,  for¬ 
ming  a  conical  protuberance.  Antennal  groove 
deep,  elongatedly  oval  ;  dividing  ridge  rudi¬ 
mentary.  Antennae  touching  each  other  at 
their  base,  drooping.  First  and  second  articles 
short,  the  third  more  than  twice  the  length 
of  the  first  two,  ridge-shaped  (sub-cylindrical, 
with  dorsal  ridge);  at  the  base  it  broadens 
backwards,  being  narrower  at  the  apex. 
Arista  (springing  from  the  ridge),  outstanding 
in  a  latero-horizontal  direction,  pennate  on 
dorsal  side.  Mouth  opening  rather  wide.  Pro¬ 
boscis  retracted.  Under  face  somewhat  vesi¬ 
cular.  Scutum  almost  square. 
Legs  delicate,  slender.  Tarsi  slight,  not 
flattened.  Ungues  slender,  somewhat  longer 
than  the  empodia.  Wings  rather  long,  with 
elongated  hemispherical  lobule.  Transversal 
apical  vein  present;  first  posterior  marginal 
cell  open.  Fourth  longitudinal  vein  without 
appendix,  squamae  large.  Abdomen  heart- 
shaped,  flat,  sharpened  at  the  rear.  Dorsal 
tergites  folded  under,  metallic  ;  abdominal 
ones  small,  lustreless.” 
Dermatobia  cyaniventris  MACQUART. 
Say’s  description  is  unknown  to  me. 
MACQUART’s  is  as  follows;  ,lCuterebra 
cyaniventris  NOB. 
