88 Transactions. — Zoology. 



Genus Latjxania, Latreille (1805). 



Body dark, shining ; antennae reaching the epistome, the 

 third joint elongated, linear; face receding. 



Lauxania bilineata, sp. nov. 



Dark-brown, shining, with two white bands extending 

 from the head, just inside the eyes, along the thorax ; the 

 front between the white bands jet-black. Antennas piceous. 

 Legs dark-brown, the distal ends of the middle and hind tibiae 

 as well as all the tarsi tawny. Wings ochraceous, the veins 

 tawny. Length, 5 mm.; wing, 4 mm. 



Hab. Otago and Canterbury (F. W. H.). 



There are two fronto-orbital bristles, but none on the 

 front. No vibrissas. The third joint of the antennas is linear, 

 its length about three and a half times its breadth ; the arista 

 is minutely pubescent. The tibiae have a preapical bristle. 

 The chief cross-vein lies outside the end of the first longi- 

 tudinal. The distance between the cross-veins is about one 

 and a half times the length of the posterior cross-vein, and 

 the distance of this from the margin is about one-half of its 

 length. 



Family OPOMYZID^. 



"Front with stout bristles above; clypeus rudimentary; 

 border of the mouth either pubescent or with long hairs, the 

 foremost of which sometimes forms a distinct vibrissa. Pro- 

 boscis short ; palpi rather small. Middle tibia with a dis- 

 tinct, posterior tibia with a very short, spur ; the exterior side 

 of the tibiae without an erect bristle before the tip ; claws and 

 pulvilli small. Wings elongated and narrow, with no bristles 

 on the costa; the axillary incision wanting or very small. 

 First longitudinal vein much abbreviated ; the auxiliary vein 

 becomes obsolete before reaching the first longitudinal ; the 

 latter emits, shortly before its end, towards the costa, a 

 branch, which may be considered as the end of the auxiliary 

 vein. Basal cells small " (Loew). 



Genus Opomyza, Fallen (1820). 



Head and thorax convex, with a few bristles. Antennae 

 short, the first and second joints minute, the third round ; 

 arista pubescent. Abdomen sublinear. Wings generally 

 spotted ; the first longitudinal vein ending at one-fourth the 

 length of the wing. Legs moderate. 



Opomyza apicalis. 



Op. apicalis, Walker, Cat. Dipt, in Brit. Mus., p. 114 (1849) ; 

 Hutton, Cat. Dipt. N.Z., p. 69. 



Head and thorax pale-tawny ; abdomen dark-brown. Legs 



