Diptern.] 



SUBANTARCTIC ISLANDS OF NEW ZEALAND. 



141 



Icaridion nasutum, sp. hov. 



Size. — About 4j mm. 



Colour blackish ; frons yellow-grey. 

 Antennae and palpi blackish ; pleurae grey. 

 Legs fusco-testaceous. 

 Abdomen hairy. 



The short strip-like wings have one fairly strong central forked vein ; the 

 posterior margin is somewhat bristly. 

 Specimens preserved in spirit. 



Hab. — Monument Harbour, Campbell Island. ^ 



Type. — Cambridge Museum. 



Baeopterus, gen. nov. 



This genus is well marked by its much-shortened wings (smaller in the female 

 than in the male), the greatly elongated legs, and the extraordinarily reduced 

 chaetotaxy. 



Texture coriaceous. 



Head. — Frons and mouth prominent, much excavated between the two. Lunula 

 well developed and furrowed longitudinally. Antennae inserted 

 on the underside of the forehead ; 1st joint small, 2nd conical, 

 3rd small and partially hidden by the 2nd. Arista long and bare, 

 thickened at the base. The only bristles present are the ocellar 

 ones. Eyes bare ; anterior margin semicircular, posterior far 

 less curved ; vertical diameter about half the depth of the head. 

 Palpi stout, rod-shaped, prominent, and extending beyond the 

 mouth. Proboscis fleshy, with a blunt conical tip pointing back- 

 wards (see fig. 7). 



Thorax. — The suture and humeral callus well developed. No 

 dorsal or pleural bristles, and only a short pair of scutellar ones, 

 the pleura before the halteres is exceptionally well developed. 



Win^s reduced in size, but with well-developed veins ; they appear as if the 

 distal part had been abbreviated in comparison 

 with the proximal. Cross-vein nearer the end 

 of discal cell. Costa devoid of spines (see fig. 8). 

 Halteres long, clubbed at end. 



Legs very long in proportion to the body- 

 length. Femora incrassated in the male ; the 

 hind pair are about 1^ times as long as the 

 others, and are strongly spined beneath ; in the 

 female not incrassated. Mid tibiae with an apical crown of bristles : hind tibiae 

 with two preapical bristles. Claws and pads very well developed. 



Abdomen somewhat flattened horizontally. Male genitalia well developed, 

 with an outer pair of appendages which are forked at the tip, and a chitinous 

 inner pair. 



Fifl. 7.— Head. 



The tubercle on 



Fi(i. 8. -Wing of Male (5mm.). 



