206 Dr. C. F. Alexander on 



Macromastix tapleyi, sp. n. 



Size small ; antennse short in both sexes ; mesonotal 

 prsescutum brownish yellow with three plumbeous-brown 

 stripes ; thoracic setse microscopic ; wings fully developed 

 in both sexes, faintly infuscated ; cell 2nd A narrow ; abdo- 

 men, pale brown. 



Mfl/e.— Length 7-8*5 mm. ; wing 9-10 mm. 



Female. — Length 8*5 mm.; wing 9-10*2 mm. 



Frontal prolongation of the head yellow, darker laterally ; 

 labellse green ; palpi dark brown ; nasus conspicuous, entire. 

 Antennse short ; scape yellow ; flagellum black, the basal 

 segment brown ; basal flagellar segment pyriform ; segments 

 beyond the second flagellar elongate-cylindrical. Head pale 

 brown, yellowish poUinose. 



Pronotum greenish ochreous. Mesonotal prsescutum 

 brownish ochreous with three plumbeous to dark brown 

 stripes that are rather ill-deflned ; lateral margins of the 

 sclerites greenish ; interspaces more or less infuscated ; 

 scutal lobes plumbeous brown ; scutellum light green or 

 ochreous ; postnotum brownish green or ochreous, darker 

 posteriorly. Mesonotum with microscopic black setse on the 

 interspaces. Pleura buffy with tints of green. Halteres 

 pale, the knobs greenish brown. Legs with the coxae and 

 trochanters concolorous with the pleura; remainder of the 

 legs brown, the tips of the tibise narrowly darkened, the 

 long slender tarsi brownish black. Wings fully developed 

 in both sexes, with a faint brown tinge; cell Sc a little 

 darker ; stigma oval, pale brown ; veins dark brown. 

 Venation : petiole of cell M^ a little longer than m ; m-cu 

 present ; cell 2nd A narrow, in the female a little more 

 widened distally. 



Abdomen pale brown with greenish tints, especially 

 basally; in some specimens the caudal margins of the 

 tergites are narrowly darker brown. Male liypopygium 

 light green ; ninth tergite with a V-shaped notch, the 

 surface densely set with microscopic black pegs. Ovipositor 

 with the tergites having a V-shaped median apical notch ; 

 apical angles of each half of sternum produced into a 

 slender curved spine. 



Hab. New Zealand (South Island). 



Holotype, S ? Governor's Bay, Canterbury, altitude 80 feet, 

 February 24, 1922 {J. F. Tapley). 



AUotopotype, $ . 



Paratojwtypes, 28 c^ ? , January 24-March 1, 1922 

 (./. F. Tapley) ; paratypes, 1 9 , Lyttelton, February 2, 1922 



