on inner surface of tarsi; ungues yellow, except for the shiny black tips: pulvilli yellow.

Abdomen shiny, covered on the dorsal surface with orange pile, and on the ventral surface with long yellow hairs; 1st segment—i.e., the segment partially overlapped by the scutellum—bronzy; 2nd segment bronzy-black, except for 2 triangular orange spots, one on each side, the bases forming the lateral margins of the segment; the apices of these spots do not meet at the centre, but are separated by the stalk of a black T-shaped median patch, the cross of which forms the anterior margin of this segment; 3rd segment bronzy, except for a dome-shaped black spot having its base on the anterior margin and apex at the centre of the segment; the 4th segment as the 3rd, but inclined to be of a darker colour. The posterior margin of each segment is coloured by a black transverse band, broader at the centre than at the lateral extremities.

Length, 12 mm.; of wing, 9 mm.

Hab.—Captured above a stream, during very warm weather, near Purehurehu, January, 1909. Not common.

H. cargilli sp. nov.

Vertex and vertical triangle dark brown, the former covered with long black hairs; frons tawny brown with yellow reflections, and bearing hairs similar to the vertex; no dividing band between the hairs of vertex and frons; the hairs covering these latter portions arranged as in preceding species; frontal lunule bare, shiny brown; a slight median longitudinal groove running from apex of ocellar triangle to frontal lunule, reappearing at the base of the antennae, where it is prolonged down the face to the epistome. Eyes bare, dichoptic; ocelli vermilion. Face as in preceding genae yellow, with long yellow hairs; epistome bare, shiny, dark brown, with a little yellowish-white tomentum at the connection with the jowls, which are themselves yellowish-white, and clothed with long silvery hairs, becoming shorter on the occiput. Proboscis and antennae as in preceding, except that the arista of the latter is slightly margined at the base by reddish-brown.

Thorax: Dorsum grey, covered with short dark hairs; has 2 median and 2 lateral longitudinal broad dark-brown stripes; the two former are divided by a narrow grey stripe, which tapers gradually anteriorly and suddenly posteriorly so that these two stripes are united at the scutellar suture; the two latter stripes slightly converge anteriorly, but do not reach the anterior margin of the thorax. On the dorsum, around the scutellar suture, is a patch of brownish-yellow reflections, which in certain lights connects the posterior extremities of the dorsal stripes. Scutellum orange, shiny, bearing long orange hairs. Pleurae yellowish-grey, with golden hairs surrounding the dorso-pleural suture. Halteres yellow, squamae translucent orange-fringed with long orange hairs. Wings clear, transparent; base of costal cell tinged with brown, subcostal darker brown for about three-quarters of the length, where the pigment ends abruptly; bases of the auxiliary 1st and 5th longitudinal veins shiny brown. Legs hairy, yellow, except the grey coxae, the trochanters, the proximal end of the femora, the first 4 tarsal joints, especially the posterior ones, and the posterior knees, which are black; the 5th tarsal joint of each leg is inclined to yellow; posterior femora swollen; short weak black spines on the distal extremities of the tibiae, the slightly curved posterior ones being excepted, rows of short black bristles on the middle and posterior tarsi.