126 Transactions. 



oil inner surface of tarsi : unpues yellow, except for the shiny black tips : 

 piilvilli 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. 



Hah. — Captured above a stream, during very warm weather, near Pure- 

 hurehu, 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 tM'o 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. 



