466 MR. W. B. ALEXANDER, ON THE 



Specimens from the Abrolhos appear to be nearer to S. mathewsi balstoni 

 than to typical S. mathewsi maculatus ; they differ from both, however, in 

 their very dark legs, as noticed by Gould. I am therefore using a new name 

 for birds from these. islands. They have much less of the rufous tinge on the 

 rump than in S. mathewsi maculatus, and rather less than in S. mathewsi 

 balstoni. The dark streaks on the throat are narrower than in maculatus, 

 but rather larger than in balstoni. The size is almost the same as balstoni, 

 distinctly smaller than maculatus. Mr. Lipfert found a nest of this bird on 

 West Wallaby Island on December 2, 1894. 



ZOSTEEOPID*. 



Zosteropw gouldi, Bonap. Green-backed White-eye. 



Noticed in small flocks or family-parties on almost every island or islet 

 visited. They seem to have a special liking for mangroves. On several 

 occasions they were seen flying from one islet to another. Mr. Lipfert found 

 a nest containing one egg on Rat Island on November 23, 1894. 



MOTACILLIDJI. 



Anthus AUSTRALis, Vieillot. Australian Pipit. 



Helms obtained one of these birds on Gun Island. We met with a pair on 

 North Island. No doubt they are only visitors from the mainland, and 

 probably they belong to the subspecies A. a. bilbali, Mathews. 



SUMMARY. 



Mammals. — The two indigenous species of Mammals are only found in the 

 Wallaby Group, the Wallaby on both the large islands, the Rat, as far as is 

 known, only on East Wallaby Island. The latter is probably, and the former 

 certainly, subspecifically distinct from the mainland species. 



Snakes. — The three species of snakes do not appear to differ from the 

 mainland forms. At present two have been found only on West Wallaby 

 Island and the third on East Wallaby Island. 



Lizards. — Four families are represented by some 19 species. The seven 

 species of Geckonidas are only known from the Wallab}' Group, the two 

 species of Pygopodidse only from West Wallaby Island, and the single species 

 of Agamiuse from the Wallaby Islands and North Island. The Scincidas are 

 represented throughout the group, though we only met with the smaller 

 species of. Lygosoma outside the Wallaby Group ; one of the larger forms, 

 Egernia stokesi, was, however, formerly plentiful on Rat Island. 



Frogs. — Nothing is known as to the habitat of the two species recorded 

 from the group. 



