304 
pouch is either rudimentary or wholly wanting. Prof. Burmeister 
places his species in a new genus in which this part is imperfect or 
absent. The specimen from Mr. Fraser, on the contrary, possesses 
a complete pouch, in which, according to that gentleman’s note, 
were several young ones. When it came into my hands, this part 
contained cotton-wool, and was about the size of a large hazel-nut. 
This, as it appears to me, is quite sufficient evidence of the distinct- 
ness of the two species; but the specimen described by Mr. Water- 
house remains doubtful, since we do not know to which to refer it. 
The accompanying drawings (see woodcut, p. 303) of the skull of 
Didelphys waterhousii will perhaps assist us in making out the rela- 
tionship of these species. 
2. DESCRIPTIONS OF TWENTY-TWO New SPECIES oF HUMMING- 
Birps. By Joun Govutp, F.R.S., etc. 
As my work on the Trochilide is now fast drawing to a close, I have 
examined with care and minute detail my entire collection of this 
great and important family of birds, and I find therein more than twenty 
species, which, I believe, have not yet received specific appellations. 
Many of these I have had by me for years, while others have been 
more recently acquired. Of the specific value of those described in the 
following pages I am perfectly satisfied ; but in case any doubt should 
be entertained on the subject, my collection is, and will be, at all times 
accessible for their elucidation. 
GrRyPus sprxi, Gould. 
Crown of the head bronzy-brown; upper surface and all the tail- 
feathers very rich reddish-bronze ; wings reddish purple-brown ; line 
above the eye buff; ear-coverts dark-brown ; throat, chest and under 
surface deep reddish-buff; under tail-coverts bronzy, each slightly 
tipped with buffy-white ; upper mandible black ; under mandible 
yellow, with a black tip ; feet yellow. 
Total length 47 inches; bill 14; wing 22; tail 14. 
Hab. Supposed to be Brazil. 
Remark.—This bird is considerably smaller than G. nevius, and 
has a less cuneate tail. It is possible that this may be one of the 
sexes of Glaucis dohrni; many of its colours would induce such a 
belief; and if such should prove to be the case, that bird must be re- 
moved from the genus Glaucis to that of Grypus. I have named this 
bird in honour of the celebrated traveller Spix, in whose work there 
occurs a figure of a bird (G. ruficollis) which somewhat resembles 
my specimen: not so, however, the accompanying description, which 
appears to be that of the species so frequently sent from Rio de 
Janeiro, and which is generally known as Grypus nevius. 
GLaAvutIs MELANURA, Gould. 
Centre of the throat, chest, and under surface buff; a streak of 
dark brown passes downwards from the base of the lower mandible, 
