128 SUBANTARCnC ISLANDS OF KEW ZEALAND. [Diptera. 



MILICHIDAE. 



MiLICHIA, Mg. 



MUichia littorea, Hutton. T.N.Z.I., xxxiv, 174. 

 Antipodes Islands, I.e. 



AGROMYZIDAE. 



Agromyza, Fin. 



Agromyzn ausfraliensis, Mik. Verh. Z.B. Wien, xxxi, 202 ; also, T.N.Z.I., xxxiii, 93. 

 Auckland Islands, I.e. 



OCHTHIPHILA, Fin. 



Ochihiphila australis, Hutton. T.N.Z.I., xxxiv, 174. 

 Campbell Islands, I.e. 



List. — The list of species includes those hitherto recorded from these sub- 

 antarctic islands, together with those now described in this paper. The former 

 records were partly obtained from Mutton's list (Index Faunae N.Z., 1904) and 

 partly from the " Zoological Record." A certain number of the specimens sent 

 belonged to species already described, and these are marked in the list by an 

 asterisk (*), which mark is also put against new localities for previously recorded 

 species. The new genera and species are also indicated. 



Material. — Many of the specimens were well pinned and set, but a considerable 

 proportion were in tubes, being preserved in spirit. When this is the case it is men- 

 tioned in the description. In the case of Diptera, spirit specimens are very unsatis- 

 factory : they cannot be dealt with in the wet state, as the hairs and other structures 

 are matted up, and when dried a considerable and unequal amount of contraction 

 takes place. With such a specimen, while it is often fairly easy to decide on the 

 generic relationships, the specific details are usually difficult to make out. Further, 

 it is practically impossible to make drawings from such specimens, owing to the result- 

 ing distortion. All Diptera should be taken in an ordinary killing-bottle, and pinned 

 on small papered cork blocks. For this purpose only silver pins should be used, or 

 pins containing but little alloy, as otherwise the pins corrode, in some families with 

 considerable rapidity. If sufficient specimens are taken, it is desirable to have at 

 least one specimen of each sex pinned with the ventral surface upwards. In the 

 case of a single specimen of a species, the most useful method is, however, to pin the 

 insect on its side, the pin passing through the thorax just below the wing-insertion ; 

 the legs should be prevented from contracting together by the insertion of one or 

 two ordinary small pins, which can be removed when the insect is dry. A specimen 

 pinned in this way suffers less damage to many important details of thoracic chae- 

 totaxy, &c., than when pinned in any other manner, and is quite useful for purposes 

 of study. 



It is evident from the nature of the species sent that the collecting of the same 

 was almost entirely confined to the coast. In view of the interest of the species 



