130 



SUBANTARCTIC ISLANDS OF NEW ZEALAND. 



[Diptera. 



The body is ochreous-brown, with the abdomen annulate in brown and yellow. 

 This is most striking with no magnification. We can also express it by saying that 

 the ground-colour is yellow-brown with a broad brown hind border to each segment. 



The male has a pair of large fleshy yellow forceps. 



The legs are yellowish, with the last tarsal joints very slightly infuscate, 



Hab. — Auckland Islands. 



Types. — Cambridge Museum. 



Fui.l— Palp. 



Zaluscodes, gen. nov. 



Wings much abbreviated, with no distinct veins. Antennae with 16 joints. 

 Palpi with 4 joints, the last orbicular and attached to the side of the 

 small 3rd joint (see fig. 1). Tibial spurs present on all the legs. 



In the " Zoologischer Anzeiger," band xxix (1905-6), p. 69, the 

 genus ZalAisa was established by Dr. Enderlein for a Limnobiid with 

 abbreviated wings which was obtained from the Falkland Islands. 

 Among the insects sent for examination was a pair of another Limnobiid, also 

 with shortened wings; but it was felt necessary to make a separate genus for the 

 species. The differences between Zalusa and Zaluscodes are as follows : — 



Zalusa. 



Antennae, 14-jointed. 

 Wings about length of thorax, with well- 

 defined veins. 

 Tibial spurs absent. 



Zaluscodes. 

 Antennae, 16- jointed. 

 Wings about half length of thorax, with 



no recognisable veins. 

 Tibial spurs present. 



The male genitalia appear to be somewhat as shown for Zalusa in Dr. Ender- 

 lein's paper, but the specimen was not in such condition as to make an exact com- 

 parison possible. 



The female of Zalusa is not known. In Zaluscodes the female is provided 

 with a well-developed ovipositor, which is larger in proportion than is the case in 

 Limnobiids in general. 



Zaluscodes aucklandicus, sp. nov. (Plate IV, fig. 1.) 



Length. — About 5 mm. 



Male. — Uniformly yellow-brown, with the exception of the last joint of the 

 palpi, which is blackish-brown, and the last tarsal joints, which are somewhat suffused 

 with black. 



Head. — Nearly circular in side profile, with bare circular eyes, whose diameter 

 is about 0*6 of the vertical depth of the head. 



Proboscis. — Truncated, conical in form, about half as long as the depth of the 

 head. Antennae : 1st joint somewhat strap-like ; 

 2nd, spherical, with a diameter about twice that 

 of the flagellar joints ; 3rd, pyriform ; 4th to 16th, 



nearly orbicular at first, and becoming somewhat , ^ 



more elongate towards the tip, each joint provided p-m. 2.— Antenna. '^•^ 



with a few hairs ; length, about 1 mm. (see fig. 2). 



