Hutton. — Diptera of Southern Islands. 169 



Art. XIV. — On a Small Collection of Diptera from the 

 Southern Islands of New Zealand. 



By Captain F. W. Hutton, F.E.S. 



[Read before the Philosophical Institute of Canterbury, 3rd July, 1901.'] 



This collection was made by myself last January, when, at 

 the invitation of His Excellency the Earl of Eanfurly, I 

 visited the islands in the Government steamer " Hinemoa." 

 The time for collecting was short. I landed once on the 

 Snares, five times on Auckland Islands, once on Camp- 

 bell Island, and once on Antipodes Island. From what 

 I saw I am convinced that there are many more species 

 to be obtained. I saw spiders on all the islands, and 

 a millepede on Auckland Islands ; but, unfortunately, my 

 foot slipped just as I was going to put it in a bottle and I 

 could not find it again. The common house-fly (Musca 

 domestica) was common on the steamer, but I did not find 

 it on any of the islands. This may be due to the fact of 

 there being no horses on the islands. Also, Calliphora 

 quadrimaculata came freely on board while we were lying 

 at the Auckland Islands, but all left before we got to Camp- 

 bell Island, only a few hours' steaming, and I did not find the 

 species there at all. These facts show that flies are not so 

 easily spread by steamers as is commonly supposed. 



Simulium vexans. 



S. vexans, Mik, Verh. d. zool.-bot. Gesell. in Wien, vol. xxxi., 



p. 201 (1881). 



" Fern. — Nigro-fuscum, polline cinerascenti obtectum, 

 fronte thoracisque dorso orichalceo-pilosulis ; halteribus 

 pallidis, pedibus fuscis, geniculis metatarsique posticis pallidis. 

 Alarum venis posterioribus sat crassis. Long. corp. 3 mm., 

 long. alar. 3-3 mm." (Mik). 



Hob. Auckland Islands. Not very abundant. 



This species differs from S. australiense in being larger, in 

 the absence of yellow spots from the shoulders, and in the 

 femora and tibiae being dark ; also, the fifth and sixth longi- 

 tudinal veins are stronger. 



There are ten joints in the antennae. 



Beris micans. 



B. micans, Hutton, Trans. N.Z. Inst., vol. xxxiii., p. 6 (1901). 



Hah. The Snares. 



A single specimen. The antennae are very dark-brown. 



