510 Dr. C. r. Alexniult-r on 



indicated only posteriorly ; sontal lobes aiul postnotinn 

 sliijlitly darker. Pleura ol)sciire brovviiisli tcstace(jus. 

 llalteres Ijrown, the hasr of the stem paler. Legs with tiie 

 coxa; pale yellowish brown ; troelianters testaceous ; fenioia 

 and tibial pale brown, the tarsi darker. Wings witli a 

 strong brown tinge, the stigma oval, darker brown ; veins 

 dark brown. Venation : Sc^ ending opposite or just beyond 

 the origin of lis, Sc, some distance from the tip of Sc,, the 

 latter alone variable, from one-half to nearly as long as 

 the basal deflection of Citi ; cell 1st M-, closed, the hasnl 

 deflection of Cvi at the fork of M. 



Abdomen pale brown, tliesternites a little more yellowish. 

 Usually both sternites and tergites ap))ear faintly bicoiorous, 

 the bases being paler than the dark brown caudal margins 

 of the segments. Male liy|)opygium with the rostriform 

 appendage bearing, instead of the usual two spines, a fa^cieU- 

 of about nine such spines, the apex of the appendage 

 beyond these spines long and slender. 



Hub. New Zealand (both Islands). 



Hulotijpe, S , Ohakune, altitude 2000 feet, October 1 ;' 

 1921 (7'. R. Harris). 



Allotype, ? , Governor's Bay, Banks Peninsula, Canter- 

 bury, Octot)er 5, 1921 (/. IT. Campbell) ; alcoholic. 



Varatopotype, 1 $ ; parutypes, 15 cJ ? , with tlie allotype, 

 alcoholic; 1 S •> Dunedin (Waitati), Otago, October 24, 

 1921 (M. N. IVatt). 



Molojjhilus luteipygus, sp. n. 



General coloration pale reddish bro\\n ; front ycUow, 

 vertex and occiput brownish grey ; scutelluni obscure yellow ; 

 postnotum and pleura dark brown; halteres yellow; wings 

 with a strong yellow tinge ; vein 'Znd A elongate; abdomen 

 dark brown, the hypopygium obscure yellow. 



Mule. — Length 28 mm. ; wing 3*8 mm. 



Female. — Length 3 mm. ; wing 4— 4'1 mm. 



Rostrum pale brown, the j)alpi darker brown. Fi'ont 

 yellow. Antennae dark brown, short, the flagellar segments 

 oval with conspicuous verticils. Vertex and occiput dark 

 brownish grey. 



Pronotal scutelluni almost white. Mesonotal praeseutum 

 reddish brown without distinct markings, more greyish 

 laterally ; scutum ^itli the median area broadly ohscine 

 yellow, the lobes dark brown ; scutellum obscnre browinsh 

 yellow, darker basally ; postnotum dark brown. Pleuia 

 flark brown. Halteres yellow, the knobs vei;y conspicuous, 



