new or littJe-known Tipulidre. 205 



obscure yellow sublaterally, the extreme lateral margins of 

 the segments ochreous ; sternites obscure yellow, the caudal 

 margin of the segments narrowly infuscated ; subterminal 

 segments and ovipositor dark brown. 



Hab. New Zealand (North Island). 



Holotype^ $,Ohakune, altitude 2060 feet, December 25, 

 1921 {T.R. Harris). 



Macromastix minutissima, sp. n. 



Size very small (wing under 8 mm.) ; general coloration 

 light grey ; antennse short in both sexes. 



Male.— Length 5-8-7-3mm.; wing 7-2-7-4mm. 



Femule. — Length 6'2mm. ; wing 7*5 mm. 



Frontal prolongation of the head ochreous ; nasus very 

 short, the apex obtuse. Antennse short in both sexes ; scape 

 obscure yellow, sparsely pruinose ; flagellum dark brown ; 

 flagellar segments short. Head obscure grey, clearer on the 

 orbits and genae. 



Mesonotal prsescutum light grey, with four dark grey 

 stripes; scutal lobes dark; remainder of the mesonotum 

 very light grey ; thoracic setse relatively short, pale. Pleura 

 pale, mesepisternum and sternum grey, separated by a 

 narrow, pale, longitudinal stripe ; posterior pleurites almost 

 whitish; pleurites covered with a microscopic, appressed, 

 woolly pubescence. Halteres obscure yellow, the base of 

 the knobs infuscated. Legs with the coxae whitish yellow ; 

 trochanters obscure yellow ; remainder of the legs brown, 

 the femora and tibiae broadly paler basally ; legs relatively 

 short and stout. Wings subhyaline ; stigma pale ; veins 

 brown ; all veins caudad of the radial field very delicate. 

 Venation : Rs a little shorter than i?2+3 '} ^^^^ 1^^ ^^2 strongly 

 narrowed distally; petiole of cell Mi about 2*5 times m; 

 basal deflection of Cui beyond the fork of M, the distance 

 about equal to or less than r-m ; cell 2nd A narrow. 



Abdominal tergites grey, the lateral margins broadly 

 ochreous ; sternites grey, the lateral and caudal margins 

 ochreous ; in the female the abdomen is more uniformly 

 ochreous. Hypopygium ochreous, of very simple structure, 

 the ninth tergite unarmed. 



Hab. New Zealand (South Island). 



Holotype, J ,Mt. lda,Otago, altitude 4000 feet, February 20, 

 1921 {Geo. Hoives). 



Allotopotype, ? , with the type. 



Paratopotypes, ^ S S , with the type ; 1 c? at 4500 feet ; 

 1 c? at 5000 feet, February 19, 1922. 



This is the smallest species of Macromastiw yet discovered. 



