Three species of this form are all that are at present known, and of these two are figured for the first time in the present work. They all inhabit the southern part of Australia, where they frequent the open districts studded with bushes and low trees; the _E. albifrons_ is occasionally found on the open plains. 217. Ephthianura albifrons Vol. II. Pl. 64. 218. Ephthianura aurifrons, _Gould_ Vol. II. Pl. 65. 219. Ephthianura tricolor, _Gould_ Vol. II. Pl. 66. Genus XEROPHILA, _Gould_. Generic characters. _Bill_ short, semiconical, robust at the base, without any notch at the tip; and provided with a few hairs at the base of the upper mandible; _nostrils_ round and covered by minute feathers; _wings_ moderate in size; first primary short, the third and fourth the longest; tertiaries broad and somewhat elongated; _tail_ moderate, square and slightly concave; _tarsi_ robust; hind-toe strong, anterior toes feeble, the exterior longer than the inner one. A curious form, of which only one species is known, and the situation of which in the natural system is quite undetermined. It has many of the actions and manners of the _Acanthizæ_, but its robust and gibbose bill precludes its being placed with that group. It is mainly terrestrial in its habits and builds a domed nest. 220. Xerophila leucopsis, _Gould_ Vol. II. Pl. 67. Genus PYRRHOLÆMUS, _Gould_. Generic characters. _Bill_ shorter than the head, slightly compressed at the sides, with a very minute notch at the tip, and beset with a few hairs at the base; _nostrils_ linear and covered with an operculum; _wings_ short, round, first primary rather short, the third the longest; _tail_ short, round and concave, _tarsi_ moderate; external toe longer than the inner one. Another anomalous form, the structure of which does not approximate very nearly to that of any other genus, but is perhaps most nearly allied to _Acanthiza_. The only species known frequents scrubby places and thick underwood; is much on the ground, but occasionally mounts on a twig to sing. 221. Pyrrholæmus brunneus, _Gould_ Vol. II. Pl. 68. Genus ORIGMA, _Gould_. _Bill_ nearly as long as the head, incurved, carinated, indented near the tip; _nostrils_ oval, lateral, basal, and covered by an operculum; _wings_ moderate, rounded, first quill short, fourth, fifth, sixth and seventh nearly equal and longest; _tail_ moderate and slightly rounded; _tarsi_ moderate; _toes_ rather short, the outer toe much longer than the inner; _plumage_ dense.