52 Transactions. — Zoology. 



In my specimens the third joint of the antennae is concave 

 front, and the 

 of the abdomen. 



in front, and there are no discal setae on the middle segments 



Hystricia pachyprocta. 



H. 'pachyprocta, Nowicki, Mem. Krakauer Akad. Wissen., 

 1875, p. 25; Hutton, Cat. Dipt. N.Z., p. 47. Tabanus 

 impar, Hudson, Man. N.Z. Ent., p. 54, pi. vi., fig. 6. 



Abdomen bright-tawny, with a black longitudinal band 

 which widens posteriorly, so that the last segment is alto- 

 gether black. Length, 11-16 mm. ; wing, 10-13 mm. 



Hab. Wellington (Hudson) ; Canterbury and Otago 

 (F. W. H.). 



The middle abdominal segments have both discal and mar- 

 ginal setae. 



Genus Occisor, gen. nov. 



Head rather produced in front, rather shorter at the 

 vibrissas than at the base of the antennae. Eyes hairy, widely 

 separated in both sexes, but rather nearer in the male. 

 Fronto-orbital bristles hardly extending below the bases of the 

 antennae ; cheeks with hairs, but no macrochaetae ; facial ridges 

 bare ; vibrissas distinctly above the anterior edge of the mouth. 

 Second joint of the antennae conical, various in length ; third 

 joint from two to four times the length of the second ; second 

 joint of the arista about twice as long as broad ; third joint 

 bare, not much swollen at the base. Abdomen oblong, with 

 marginal but no discal setae on the middle segments. The 

 first posterior cell is open, and ends considerably before the tip 

 of the wing ; the posterior cross-vein is nearer to the margin 

 of the wing than to the chief cross-vein ; the length of the 

 last section of the fifth longitudinal vein is less than one- 

 fourth of the length of the preceding section. 



This genus differs from Brackycoma in the third joint oi 

 the antennae being longer, and in the abdomen being without 

 spots. 



Occisor inscitus, sp. nov. 



Front smooth, black, the sides and face yellowish-white. 

 Second joint of the antennae elongated, rather less than one- 

 half of the length of the second joint ; the first and third 

 joints piceous. Proboscis black, the palpi tawny. Thorax 

 and scutellum black, a red spot at the base of the wings. 

 Abdomen dark - blue. Legs black, the knees testaceous. 

 Wings pellucid ; the last section of the fifth longitudinal 

 vein between one-fourth and one-fifth the length of the pre- 

 ceding section Length, 10-11 mm. ; wing, 7-9 mm. 



Hab. Christchurch (F. W. H.). 



