]18 Mr. A. J. North on Tiro 



species. Full particulars m ill be found in the various works 

 quoted above. 



Tlie two eggs figured measure respectively l"27x'89 

 and r25 x. '91 inches. 



VI. — Descriptions of Two neiv Species and a new Genus 

 of Aui^traHan Birds. By Alfred J. North, C.M.Z.S., 

 C.M.B.O.U., Ornithologist to the Australian Museum, 

 Sydney *. 



During the preparation of the Appendix to the ' Nests and 

 Eggs of Birds found Breeding iu Australia and Tasmania/ 

 I discovered, in the Australian Museum, specimens of two 

 apparently uudescribcd, or rather unnamed, species. The 

 skins of both were procured by the late Mr. Alexander 

 IMorton in February 1879 at Port Essington, in the 

 Northern Territory of South Australia, 



Neositta mortoni, sp. n. 



Adult mate. Like the adult male of Neositta leucuptera 

 Gould, but the black on the forehead extends down to the 

 base of the bill ; the mantle and back are of a darker shade 

 of brown and more broadly streaked with black ; only the 

 chin, throat, and centre of the fore- neck are white, the 

 remainder of the under surface being brownish white with 

 darker brown centres or tips to some of the feathers on the 

 sides ot the breast and abdomen ; " bill yellow, black at 

 the tip; legs and feet bright yellow ; irfs yellow^'' {Morton). 

 Total length 4'3 inches; wing 3"3; tail IS; bill 0"5 ; 

 tarsus 0'G8. 



Adutt female. Similar to the male, but having the sides of 

 the head, the cheeks, ear-coverts, chin, and upper throat 

 ahso black. 



Hub. Port Essington, Northern Territory of South 

 Australia. 



* By permission of the Trustees of the Australian Mu&euai. 



