38 
ZOOLOGY OF THE VOYAGE OF THE BEAGLE. 
ciatus. Back, dull gray. Interscapulars, with the central part of each 
feather, black, terminating in a point ; the outer part of the web being broadly 
fringed with a very pale fulvous, the inner with gray. Wings : primaries 
brown, with fulvous marks, forming three irregular transverse bars, which are 
scarcely visible when the wing is closed. Tail and upper tail- coverts, dull 
coloured, very obscurely marked with transverse bars of gray and fulvous, of 
different degrees of darkness. Under surface . — Throat white, edged with 
fulvous on lower side. Breast, belly, and under tail-coverts, fulvous, with 
numerous very narrow transverse bars of brown. The pale fulvous marks, 
forming interrupted bars, are more plainly seen on this than on the upper side 
of the tail. 
Third primary, very little longer than second, and second than first. First rather 
longer than fourth. Extremities of wings reaching within an inch and a 
quarter of end of tail. End of tail more rounded than in last species. 
In. 
Total length . . . . . . 7 5 
Wings ....... 5 
Tail 4 
In. 
Tarsi ....... | 
Middle toe, from tip of claw to joint of foot 
From tip of beak to rictus ... 1 
Habitat, La Plata, ( September ). 
This species is not uncommon on the wooded banks of the Parana, near 
Santa Fe. If disturbed, it rises from the ground, in the same inactive manner 
as the European species. I saw one alight on a rope diagonally, but not so com- 
pletely in a longitudinal position as does the C. Europceus, nor transversely as 
other birds. Mr. Gould observes, that “ this goatsucker is full a third less than 
the Caprimulgus Europceus, and is remarkable for the uniformity of its markings, 
having no distinct white bars, or marks, either on the wings or tail.” 
Family.— HIRUNDINIDiE. 
1. Progne purpurea. Boie. 
Hirundo purpurea, Wils. 
My specimens were obtained at Monte Video, (November) and Bahia Blanca, 
39° S. (September) how much further southward this species extends I do not 
know. Jardine says, that in North America it migrates during summer as far as 
the Great Bear Lake, in Lat. 66° N. ; it is mentioned by M. Audubon, at New 
Orleans, 30° N,, and by Mr. Swainson, at Pernambuco, in 8^° S.; we may, there- 
