24 Transactions. — Zoology. 



anterior branch of the fourth longitudinal vein, beyond the 

 discal cell, bent forwards, and then curving outwards to the 

 margin of the wing. Legs dark-brown. Length, 7 mm. ; 

 wing, 8 mm. 



Hab. Wellington (Hudson). 



Family THEEEVID^E. 

 "Three basal cells much prolonged; the two intercalary 

 veins present; the third longitudinal forked. Antennae with or 

 without a style. No empodium. Under-lip fleshy " (Loew). 



Genus Anabarhynchus, Macquart (1848). 

 Proboscis salient, thick, turned upwards, generally hiding 

 the palpi. Antennae inserted towards the lower part of the 

 head ; the first joint cylindrical, the second short, the third 

 terminated by a short style. Fore and middle femora without 

 bristles, hind femora with a few only. Neuration of the wing 

 as in Thereva, but the fourth posterior cell is open. Female 

 with the eyes further apart than in the male, and with a 

 circle of setae at the end of the abdomen. 



Key to the Species. 

 Third joint of the antennae longer than the first, glabrous 

 or nearly so. 

 Body black. 



Tibiae reddish . . . . . . . . A. bilineattts . 



Tibiae black . . .. .. .. .. A. maori. 



Body brown or dark-grey. 



Legs piceous, with yellow knees . . A. innotatus. 



Legs brownish-yellow. 



Length of the wing, 9mm. . . . . A. luridus. 



Length of the wing, 6 mm. 



Wings without spots . . . . A. exiguus. 



Wings with spots . . . . . . A. nebidosus. 



Third joint of the antennae not longer than the first, hairy 

 at the base. 

 Length of the wing, 9 mm. or 10 mm. 



Thorax with two golden bands . . A. castaneus. 



Thorax with two silver bands . . . . A. micans. 



Length of the wing, 6 mm. . . . . . . A. cupreus. 



Section A. 

 Abdomen rather broad, subconical, black or brown, with 

 white hairs. Length of the first joint of the antennae less than 

 twice the breadth ; second joint subquadrate ; the third joint 

 longer than the first, conical, naked or with a few hairs on the 

 upper surface at the base. 



Anabarhynchus bilineatus. 



Bibio bilineata, Fabricius, Syst. Ent., p. 757 (1775). Thereva 

 bilineata, Hutton, Cat. Dipt. N.Z., p. 32. Saropogon 

 viduus, Hudson, Man. N.Z. Ent., p. 55, pi. vi., fig. 4. 

 Front, above the antennae, brownish- white, the vertex 



