202 Dr. C. P. Alexander on 



scutellum obscure yellow ; postnotum darker brown, paler 

 caudally and laterally. Pleura testaceous yellow, clearer 

 yellow posteriorly. Halteres pale brownish yellow, the 

 knobs darker. Legs with the coxse concoiorous with the 

 pleura ; trochanters testaceous, tinged with green ; remainder 

 of the legs dark brown^ the femoral bases pale. Wings with 

 a strong yellowish and brownish tinge, the stigma oval, dark 

 brown ; cell Sc dark brown, the base and narrow apex 

 yellowish ; the wing-base and cells C, R, M, 1st R^ and i?2 

 are tinged with yellow ; cells i?5, outer end of R^, 1st M2, 

 Ml, 2nd M2, 3/3, and Cui are slightly more infuscated ; cells 

 Cu and the anal cells greyish yellow to subhyaline ; very 

 small obliterative areas before and beyond the stigma and in 

 the base of cell 1st M^ ; veins brown, more yellowish at the 

 wing-base. Venation : cell 2nd Ry short and broad ; petiole 

 of cell Ml about two-thirds m ; m-cu distinct ; cell 2nd A 

 broad. 



Abdomen dark brown, the sides of the basal tergite yellow ; 

 remaining tergites dark brown, the basal lateral angles 

 broadly obscure orange ; sternites yellowish. 



Bab. New Zealand (North Island). 



Holotype, ? , Ohakune, altitude 2060 feet, January 28, 

 1922 (T. R. Harris). 



Macromastix albiplagia^ sp. n. 



General coloration pale brownish testaceous ; antennae of 

 ($ moderately elongate; mesonotal prsescutum with four 

 brown stripes, the intermediate pair more or less confluent ; 

 wings greyish, the costal region brown ; cells R and M 

 brown, variegated with white blotches; a very conspicuous 

 white area before the cord. 



Male. — Length 10-11 mm.; wing 12-13*5 mm. 



Female. — Length 10-12 mm. ; wing 13-16*5 mm. 



Frontal prolongation of the head pale brown, more 

 yellowish basally ; nasus elongate, simple ; palpi dark brown. 

 Antennae of male moderately elongate, if bent backward 

 extending nearly to the base of the abdomen ; scape and 

 basal two or three segments of flagellum obscure yellow, 

 the remainder passing into brown. Head ochreous to pale 

 brown, paler on the orbits. 



Mesonotal praescutum bufi" or greyish buff with four dark 

 brown stripes, the intermediate pair rather narrowly sepa- 

 rated or confluent posteriorly ; scutal lobes dark; remainder 

 of mesonotum pale brownish testaceous, the sides of the 



