MiLLER.— Diptera Fauna of New Zealand. 437 
Art. 33.—Material for a Monograph on the Diptera Fauna of Neu 
` Zealand: Part II—Family Empididae.* 
By Davin Милев, Government Entomologist. 
[Read before the Wellington Philosophical Society, 25th October, 1921; received by Editor, 
31st December, 1921 ; issued separately, 12th М ay, 1923.] 
ALTHOUGH the present work deals with twenty-three species of Empididae, 
considerably more exist in New Zealand ; many more have already come 
into my possession, but too late, unfortunately, to be included herein. 
For several of these I am indebted to Mr. J. W. Campbell, of Christ- 
church ; my thanks are due also to Mr. G. E. Archey for the loan (through 
Mr. Speight, the Curator) of Hutton's types from the Canterbury Museum. 
The Empididae may be characterized as follows: Head more or less 
spherical, but occasionally higher and narrower, or flattened from above 
and below. The occiput is usually convex, but sometimes concave in the 
middle; in some cases it encroaches considerably over the top of the 
head, the ocellar triangle being then situated well forward and the front 
shortened ; there are three ocelli. The eyes, which occupy most of the 
front or face in the male or in both sexes; when holoptic the upper 
facets may be larger than the lower; the posterior eye-margin may be 
concave or convex. The front may be broad or narrow, practically absent, 
he thorax when viewed from above is more or les 
in profile varies more or less from normal to decidedly hump-backed ; the 
prothorax is usually distinct from above, but may be more or less hidden 
by the dorsum, which in some cases is flat or somewhat concave immediately 
anterior to the scutellar suture, in this respect resembling some species 
of Dolichopodidae ; the notopleural area may merge with the dorsum 
The pleurae are usuall normal; but in certain cases, where the sterno- 
pleurae are produced posteriorly and adjoin the hypopleurae, the ptero- 
pleurae are crowded upward between the meta- and sterno-pleurae. 
* Part І, Stratiomyidae, in Trans. N.Z. Inst, vol. 49, p. 172, 1917; Part П, 
Syrphidae, lc., vol. 53, p. 289, 1921. 
