Like _Strepera_ this is strictly an Australian form, all the species of which frequent exclusively the southern parts of the country. Their structure is a mere modification of that of the members of the last genus adapted to a somewhat different mode of life and habits. They are more pastoral than the _Streperæ_, frequenting as they do the open plains and grassy downs, over which they run or rather hop with great facility. Their chief food consists of grasshoppers and other insects, to which berries and fruits are added, when such kinds of food are procurable. If unmolested in their natural haunts they may be considered a more familiar race than the _Streperæ_, but if persecuted they become extremely shy and distrustful. Few birds are more ornamental, or give a more animated appearance to the country than the members of this genus, either when running over the surface of the lawn-like ground, or when pouring forth their singular choral-like notes while perched together on the bare branches of a fallen _Eucalyptus_. The form and situation of the nest is the same as those of the _Streperæ_, larger, but not unlike that of the European Crow. Specimens of this form from Western Australia exhibit some trifling differences, but I have not as yet been able to satisfy myself whether they are or are not distinct. 88. Gymnorhina Tibicen Vol. II. Pl. 46. 89. Gymnorhina leuconota, _Gould_ Vol. II. Pl. 47. 90. Gymnorhina organicum, _Gould_ Vol. II. Pl. 48. Genus CRACTICUS, _Vieill._ The members of this genus, which are universally dispersed over Australia, prey upon small quadrupeds, birds, lizards and insects, which they frequently impale after the manner of the ordinary Shrikes. Their nidification resembles that of the species belonging to the genera _Strepera_ and _Gymnorhina_, the nest being a large round structure placed among the branches of the trees, and the eggs four in number. So great a similarity exists between the birds inhabiting New South Wales, Van Diemen’s Land, and Swan River, that I have thought it unnecessary to figure the whole, but the annexed descriptions, with a due attention to the localities, will obviate all difficulty in determining the species. 91. Cracticus nigrogularis, _Gould_ Vol. II. Pl. 49. _Lanius robustus_, Lath. Gen. Hist. vol. ii. p. 67? 92. Cracticus picatus, _Gould_ Vol. II. Pl. 50. 93. Cracticus argenteus, _Gould_ Vol. II. Pl 51. 94. Cracticus destructor Vol. II. Pl. 52. _Lanius curvirostris_, Lath. Gen. Hist. vol. ii. p. 52. _Lanius torquatus_, Lath. Gen. Hist. vol. ii. p. 70. 95. Cracticus cinereus, _Gould_. _Vanga cinerea_, Gould in Proc. of Zool. Soc., Part IV. p. 143.