Zoological Society. 143 



the rocks, I propose to make the type of a new genus, with the 

 name of 



Genus Petrophassa. 



Characteres generici. — Fere ut in Peristera. Ala autem et rotun- 



datae sunt et admodum breviores ; deest etiam color metallice 



seneus. Cauda magis rotundata. 



Petrophassa albipennis. Petr. superne fusca ; gutture albo- 

 guttato; primariis ad dimidium basale albis. 



Crown of the head and neck grayish brown, margined with sandy 

 brown; all the upper surface, chest and tail rufous brown, the 

 centre of each feather inclining to gray ; lores black ; abdomen and 

 under tail-coverts chocolate brown ; throat clothed with small fea- 

 thers white at the tip, black at the base ; primaries dark brown at 

 their tips, the basal half pure white ; bill and irides blackish brown ; 

 feet reddish brown. 



Total length, 10J inches; bill, J; wing, 5£; tail, 5; tarsi, J. 



Hob. Western Australia. 



Allied to the members of the genus Peristera. 



Eudromius Australis. Eudr. colore cervino vel luteolo ; abdo- 

 mine medio castaneo ; parte inferiore nee non crisso albis. 



Forehead and all the upper surface light sandy buff, the centres 

 of the feathers being brown ; primaries brownish black with sandy 

 buff shafts, and all but the first four broadly margined with the 

 same ; throat buffy white, below which a crescent-shaped mark of 

 blackish brown ; chest, flanks and under surface of the wing buff, 

 passing into reddish chestnut on the abdomen, beyond which the 

 vent and under tail-coverts are white; tail brownish black, the cen- 

 tre feather margined with buff, the outer ones with white; bill 

 dark olive brown ; feet yellowish brown. 



Total length, 1\ inches; bill, J; wing, 5^; tail, 2\; tarsi, If. 



Hub. Interior of South Australia. 



This is a highly interesting species, since it is the only bird ap- 

 proaching the form of the British Dottrel found in any part of the 

 world. This rare species has been sent me by my friend Captain 

 Sturt, who procured it during his late expedition into the interior 

 of Australia, behind Adelaide. 



Rhipidura istjra. Rhip. corpore supra sordide fusco ; caudee rectri- 



cum utrinque externd albo extrinsechs marginatd et late termi- 



natd, proximd albo ad apicem notatd, iterumque prowimd apicem 



versus lined albd tenuissimd. 



All the upper surface dull brown ; wings and tail darker brown, 



the outer feather of the latter on each side margined externally and 



largely tipped with white, the next having a large irregular spot of 



white at the tip, and the next with a minute line of white near the 



tip; chin and under surface buffy- white, with an indication of a 



dark brown band across the chest ; bill and feet black. 



Total length, 8 inches; bill, f ; wing, 3f ; tail, 3£; tarsi, f£. 



Hab. North-west coast of Australia. 



In the collection of his Excellency Captain Grey and Mr. Dring. 



