46 The Official Guide to the 
A white variety, killed at Metz in 1860, will be- 
observed in small Case 31. Another species of Buz- 
zard, of frequent occurrence in this county as an 
autumnal migrant, is known as the Rough- legged 
Buzzard. As is the case with most birds of prey, 
these migrants are almost entirely young birds. . 
Case XXXI. 
A nearly white variety of Suteo borealis, from 
Jamaica, is a conspicuous object in this case, and the 
examples of ZB. solitarius should be noticed as beauti- 
ful specimens of the taxidermist’s skill. These, like 
many other lovely specimens of the birds of prey, 
were mounted by the late Mr. Roberts, who excelled 
in giving a lifelike character to often very impracticable 
materials. 
Case XXXII. 
The last case in the corridor contains the remainder 
of the Buzzards. The members of the handsome 
South American genus Leucoplernis are conspicuous ; 
one known as ZL. ghtesbrightit, almost pure white, 
was obtained in Honduras; another specimen will 
be found in small Case, No. 16. Mr. Gurney 
remarks that in this species the proportion of black 
which mingles with the snowy white of the general 
plumage is greatest in the young birds, and appears 
to diminish as the age increases. The subject of the 
illustration, Z. semip/umbea, was killed in Costa Rica 
in 1890; it is a very rare bird, and its acquisition by 
the Museum was regarded by Mr. Gurney with much 
gratification, but we still require three other species to 
make the series of this genus complete. 
Returning to the large room, a staircase will be 
noticed, ascending which we reach the gallery contain- 
ing the remaining families of the birds of prey. In — 
