135 
Total length, 6 inches; bill, 3; wing, 3}; tail, 25; tarsi, 7. 
Hab. North coast of Australia. 
PacHYcEPHALA SIMPLEX. Pach. corpore superiore fusco, inferiore 
fuscescenti-albo, singulis plumis striga fuscd fere obsoleta longi- 
tudinaliter notatis. 
All the upper surface brown; all the under surface brownish 
white, with a very faint stripe of brown down the centre of each 
feather ; irides light brown ; bill and feet black. 
Total length, 5 inches; bill, ; wing, 27; tail, 22; tarsi, 3. 
Hab. Port Essington. 
Mr, Gould then mentioned, that having obtained another species 
of the same form as the Acanthiza pyrrhopygia of Messrs. Vigors and 
Horsfield, which latter differs considerably from the other members 
of that group, he proposed to form the two birds into a new genus, 
under the name of Hylacola, with the following characters :— 
Genus Hyxaco.ta. 
Gen. Char.—Rostrum capite brevius, compressum, ad basin equé 
altum atque latum; culmen gradatim ad apicem mandibul supe- 
rioris declive; apex levitér emarginatus ; rictus vibrissis raris in- 
structus. Nares basales, oblonge, magis grandes, et operculo 
tecte. Ale breves, admodim rotundatz concave ; primariz prima, 
secunda et tertia, longitudine dissimili, quarta, quinta, et sexta 
cozquales, et longissime. Cauda magis elongata, et rotundata. 
Tarsi mediocres. Digiti magis elongati; externi cozquales. 
Typus, Acanthiza pyrrhopygia, Vig. and Horsf. 
Hyxacota cauta. AHyl. lined alba per faciem super oculos ductd, 
vertice, corporeque superiore fuscis ; caude tectricibus crissoque 
pallide castaneis ; alarum tectricibus fuscis, fuscescenti-albo mar- 
ginatis, primariis fuscis, pogoniis externis ad basin conspicue 
albis. 
At the base of the upper mandible a line of white, which con- 
tinues along the side of the face and over the eye; above this a nar- 
row line of black ; crown of the head and all the upper surface brown ; 
upper and under tail-coverts bright chestnut; wing-coverts brown, 
edged with brownish white; primaries brown, with the outer web at 
the base white, forming a conspicuous spot in the centre of the wing ; 
tail blackish brown, tipped with white; throat striated with black 
and white, produced by each feather being fringed with white, and 
having a strong stripe of black down the centre; flanks mottled 
brown and white; abdomen white; bill dark brown; irides buff- 
white ; feet flesh-brown. 
Total length, 5% inches; bill, 9; wing, 22; tail, 23; tarsi, Z. 
Hab. Western Belts of the Murray in South Australia. 
CINCLORAMPHUS CANTATORIS. Cinc. corpore superiore arenaceo- 
fusco, colore plumarum centrali saturatiore, notd ante oculos tri- 
angulari fuscescenti-nigrd ; guld et pectore sordidé albis, hujus 
