Marshall. — On Neiu Zealand Di])tera. 273 



prominent, incurved, cylindrical, four- jointed ; first joint very 

 small, the following of about equal length ; the fourth the 

 longest. Anteunoe setaceous, pubescent, in the male as long 

 as, in the female shorter than, the body; 2 + 15 jointed ; the 

 joints of the scapus cyathiform; the flagellar joints cylindrical, 

 the terminal one very small, almost gemmiform. Thorax small, 

 oval, highly arched. Scutellum small, roundish. Metathorax 

 acclivous. Halteres large. x'\bdomen very long and slender ; 

 in the male linear, subcylindrical, eight-segmented without 

 the anal joint ; in the female nine-segmented, the last segment 

 small. Legs long and slender ; tibise with very short weak 

 spurs, the fore tibiae with a single range of spines on the inner 

 side, and the hind pair with one range on the inner and two 

 ranges of shorter and vpeaker spines on the outer side. Wings 

 large, microscopically pubescent, as long as or somewhat 

 longer than the abdomen, with obtusely cuneiformly narrowed 

 base ; incumbent in repose. Costal vein uniting with the tip 

 of the third longitudinal at or somewhat beyond the apex of 

 the wing; ausiliary vein complete, joining the costa, united to 

 the first longitudinal by the subcostal cross-vein; third longi- 

 tudinal vein with an anterior branch (which is sometimes 

 wanting), the branch short, almost vertical, ending in the tip 

 of the first longitudinal vein or in the costa ; small cross-vein, 

 short, situated almost midway between the origin of the third 

 longitudinal vein and the inner end of the second posterior 

 cell ; fourth longitudinal vein starting from the base of the 

 fifth longitudinal vein ; fork of the fifth longitudinal vein 

 united at its base to the fourth longitudinal vein by a small 

 cross-vein ; sixth longitudinal vein perfect. 



The only New Zealand species of this genus that I have 

 seen is B. luminosa (Sk.). The only specimens of this tiy, so far 

 as I know, were reared from larvae by Mr. G. V. Hudson, of 

 Wellington. The larvae are abundant throughout the colony 

 in dark, damp gullies, but whether they all belong to the same 

 species is not so far determined. Though the larvae are 

 abundant the fly seems scarce, as I have never taken any ; 

 but this may be because the insect is a night-flier. The larva 

 and metamorphosis of the insect are fully described by Mr. 

 G. V. Hudson (Trans. N.Z. Inst., vol. xxiii., pp. 43-i9, 

 pi. vhi.). 



Bolitopliila hcviinosa, Skuse (Trans. N.Z. Inst., vol. xxiii., 

 p. 47). Plate IX., fig. 2 ; Plate XIII. , fig. 4. 



Length of antennae, 0-090 ; size of body, 0-3S0 x 0-040 ; 

 expanse of wing, 0-250 x 0-070. 



Antennae very slender, as long as the head and thorax 

 combined; joints of scapus yellow, tinged with brownish ; 

 flagellar joints elongated, progressively diminishing in thick- 

 18 



