BY FREDERICK A. A. SKUSE. 679 



joints elongate, progressively diminishing in thickness, brown. 

 Hypostonia brown. Palpi yellow. Front and vertex black. 

 Thorax black or very deep brown, levigate, with a median yellow 

 line, the humeri and lateral borders pale yellow or whitish ; two 

 convergent rows of short black hairs, from humeri to scutellum ; 

 some black bristly hairs above the origin of the wings ; pleurae 

 deep brown, tinged with pale yellow ; scutellum black ; meta- 

 notum brown, bordered laterally with yellow, Halteres pallid, the 

 club black. Abdomen slender, sub-cylindrical, five times the 

 length of the thorax, dusky brown, the segments indistinctly 

 (especially the hindermost ones) tinged with yellowish anteriorly ; 

 densely clothed with very short black or dai-k brown hairs ; 

 extremity and lamellae of the ovipositor yellow. Legs long and 

 very slender. Coxse pale yellow or whitish, the fore and inter- 

 mediate pairs with the extreme apex, and the hind pair with almost 

 the apical half, dusky brown ; trochanters dusky brown ; femora 

 pale yellow or whitish, the hind pair black at the apex ; tibiae and 

 tarsi black. Tibial spurs black. In the fore-legs the tibiae and 

 metatarsi of about equal length ; the tarsi twice the length of the 

 tibiae. Wings shorter than the abdomen, pellucid, with a delicate 

 yellowish tint, and almost the apical half infuscated with grey. 

 Costal vein uniting with the tip of the third longitudinal vein some- 

 what beyond the apex of the wing ; auxiliary vein terminating in 

 the costa opposite or somewhat beyond the inner end of the second 

 posterior cell, the subcostal cross-vein situated near its base ; first 

 longitudinal vein running straight into the costa opposite a point 

 before the tip of the posterior branch of the fourth longitudinal 

 vein ; third longitudinal vein gently arcuated at its base, strongly 

 arcuated towards its tip ; posterior branch of the fifth longitudinal 

 vein abruptly reaching the margin. 



Hah. — Wellington, New Zealand (G. V. Hudson), Bred during 

 September. 



Ohs. — In this species, as in the European Bolitophila tenella^ 

 Winn., the anterior branch of the third longitudinal vein is 

 wanting. 



