58 Transactions. — Zoology. 



the New Zealand species here included the third joint of the 

 antennae is nearly four times the length of the second. The first 

 posterior cell is generally open, but sometimes closed ; never 

 petiolate. Most have discal as well as marginal setae on the 

 abdomen. The individuals of a species vary much in size. 



Key to the Species. 

 Scutellum blue margined with testaceous. 



Abdomen blue . . . . . . ..P. marginata. 



Abdomen greenish-black .. .. .. P.atrox. 



Scutellum blue . . . . . . . . . . P. nefaria. 



Scutellum testaceous or fulvous. 



First abdominal segment brown, the others blue. . P. fere day i. 

 Abdomen blue or bluish black. 

 Thorax blue or black. 



Second, third, and fourth abdominal seg- 

 ments with red spots . . . . P. clathrata. 



Third and fourth abdominal segments 



without spots . . . . . . P. nyctemeriana. 



Thorax greenish-black .. .. .. P. perniciosa. 



Abdomen greenish-black . . . . . . P. atro.v. 



Abdomen brown, not tessellated .. .. P.orasus. 



Abdomen brown, tessellated on the sides . . P. efferata. 



Scutellum bla^k .. .. .. .. .. P. fane rata. 



Phorocera feredayi. 



Eitrigaster feredayi, Hutcon, Cat. Dipt. N.Z., p. 50 (1881). 



Vertex dark-brown, lower face grey, epistome yellow ; 

 antennae, proboscis, and palpi brown. Thorax dark-brown ; 

 scutellum and posterior corners of mesonotum light-brown. 

 First segment of the abdomen brown, the three last metallic- 

 blue. Legs brown. Length, 7 mm. 



Hab. Dunedin (F. W. H.). 



I have no specimens of this species, so that I cannot add 

 to the description. 



Phorocera clathrata. 



Eurigaster clathratus, Nowicki, Mem. Krakauer Akad. 

 Wissen., band 2, ged. Auf., p. 27 (1875); Hutton, Cat. 

 Dipt. N.Z., p. 51. 



Black, the second, third, and fourth segments of the 

 abdomen with a large red spot on each side, the anterior 

 portions of the segments tessellated with white. Palpi tawny. 

 Length, 10mm.; wing, 9mm. 



I do not know this species. 



Phorocera nyctemeriana. 



Ncmoraa nyctemcrianus, Hudson, Trans. N.Z. Inst., vol. xv., 

 p. 218 (1883) ; and Man. N.Z. Ent., p. 59, pi. vii., fig. 6. 

 Vertex grey, the frontal band black ; lower face silvery ; 



antennae and proboscis black. Thorax black ; scutellum tes- 



