EXPLANATION OF PLATES. 199 
XXII. A group of “ Parasitic Birds” which place their eggs in the nests of other 
species and leave their young to be brought up by the foster-parents. 
Fig. 1. A pair of the common Cuckoo (Cuculus canorus). 
Fig. 2. A pair of Cow-birds (Molothrus bonariensis). 
The latter belongs to the American family of Hang-nests (Ictertd@). 
XXIII. Fig. 1. A pair of the Australian Lyre-bird (Menuwra superba) shewing the 
extraordinary development of the tail in the male. 
Fig. 2. A pair of the Gardener Bower-Bird (Amblyornis inornata) from New 
Guinea. These birds are remarkable for their architectural skill and the 
esthetic taste they display in preparing their playing grounds. They build 
a miniature cabin made of different mosses, surrounded by a perfectly-kept 
meadow of moss and studded with brilliantly coloured flowers, fruits and 
insects, which as they become faded are constantly replaced. 
XXIV. A pair of Gardener Bower-Birds (Amblyornis subalaris) in their “ Play- 
house.” Sent from the Owen Stanley Range, British New Guinea, by 
Captain F, R. Barton, C.M.G. 
XXV. A skeleton of the Iceland Falcon ( Hierefulco islandus) to shew the various 
bones referred to in the Appendix on the Structure of Birds. 
