278 Transactions. — Zoology. 



shorter ; arcuated, projecting forwards, somewhat eoinpressed 

 at the sides, or cyhndrical, gradually diminishing towards the 

 tip, 2 + 14 jointed; joints of the scapus distinctly set off, the 

 first cyathiform, the second one more cupuliform ; the flagellar 

 joints compact. Thorax oval, highly arched. Scutellum 

 small, almost semicircular. Metathorax arched. Abdomen 

 slender, with seven segments in both sexes, flattened, clavi- 

 form, in the male somewhat cylindrical at the base, rarely 

 entirely cylindrical, always terminating in a forceps. Legs 

 long; femora somewhat thickened, shorter than the tibiae; 

 tibiaB spurred ; very small lateral spines, one inner and two 

 outer ranges on the fore tibiae without spines, and the hind 

 pair with two ranges of lateral spines which are so small as 

 to be only perceptible with a lens. Wings somewhat broad, 

 base rounded off, as long as the abdomen or a little longer, 

 incumbent in repose, niicroscoj)ically pubescent. Costal vein 

 extending beyond the tip of the second longitudinal vein, 

 terminating some distance from the apex of the wing ; 

 auxiliary vein ending in the costa, rarely broken off, usually 

 united to the first longitudinal vein by the subcostal cross- 

 vein ; anterior branch of the second longitudinal vein very 

 short, ending either in the first longitudinal vein or in the 

 costa ; third submarginal cell always with a very small 

 petiole ; fifth longitudinal vein complete or incomplete. 



This genus is well represented in New Zealand. In those 

 species of which I have been able to make a thorough ex- 

 amination the males and females differ considerably in ap- 

 pearance. Several kinds can be found on window-panes. 



B. Antebior Branch of the Second Longitudinal 



RUNNING INTO THE CoSTA. 



a. Fifth longitudinal vein reaching the posterior margin. 

 Platyura magna, sp. nov. Plate XIII. , figs. 5-7. 



Male. Length of antennae, 0-095 ; size of body, 0-374 x 

 0040 ; expanse of wing, 0-258 x 0079. 



Antennae rather shorter than head and thorax together ; 

 joints of scapus short, cinereous, cyathiform ; joints of 

 flagellum very slightly dilated, black, naked, terminal joint 

 longer than the others, rounded anteriorly ; fourth and 

 fifth jomts mark the broadest part of the flagellum. Palpi 

 dark-orange, with a few scattered short black hairs. Head 

 black, shining. Thorax with a broad central black stripe 

 extending from the collare almost to the scutellum ; two 

 broad lateral stripes commencing some distance behind 

 the collare and coalescing about opposite the insertion of 

 the wings -with the central stripe ; rest of the thorax dark- 

 orange, with a silvery sheen ; the whole surface covered with 

 black hairs. Scutellum black, bordered with a fringe of stout 



