78 R. W. CROSSKEY 
fold in the wing surface (Text-fig. 87). Propleuron bare (except in Hillomyza). 
Prosternum always haired or setulose. Infrasquamal hairs always absent. 
Abdominal Tr + 2 excavate to its hind margin (except in Hillomyia). Mid tibia 
always with a submedian v seta . : E : : : II 
11 Lower calypter normal, outer edge not Beas loge eee Bend of vein M nearly 
always with at least a trace of an M, appendix or at least a darkened fold in the 
wing membrane continuing towards he wing margin (Text-fig. 87). Eyes bare 
or haired. Three or four post dc setae. Barette vind haired only at its anterior 
ends = i : EXORISTINI (p. 85) 
— Lower calypter bent abraptly, downwards on its outer margin (except in 
Mycteromyiella). Bend of vein M without trace of MM, appendix or fold. Eyes 
densely haired. Four postdc setae. Barette fully fal . ETHILLINI (p. 87) 
Tribe ACEMYINI 
This is a small but nearly cosmopolitan tribe in which all the known hosts are 
Orthoptera of the families Acrididae s.l. and Eumastacidae. The scutellar bristling 
is distinctive among the Goniinae (Text-fig. 68) and comprises three pairs of very 
strong setae, an apical crossed pair, a subapical pair set unusually far forwards 
on the sides of the scutellum and a basal pair. Most forms have a long series of 
proclinate orbital setae in both sexes and many have the outer tip of the third 
antennal segment formed into a rather sharp point, these features helping towards 
instant recognition of the group; the basal node of vein R,,; has only one extremely 
strong setula on both surfaces of the wing, a feature that is relatively uncommon 
in goniines, although found in the Neaerini. Only the single genus Ceracia Rondani 
(syn. Myothyria Wulp) is known in Australia, and this is distinguished from other 
acemyine genera by the following combination of characters: prosternum setulose; 
head with proclinate orbital setae in both sexes; hind tibia without pv apical seta 
(cf. Acemya Robineau-Desvoidy); humeral callus with three setae; cell R, closed 
at or just before the wing margin (Text-fig. 88); two sternopleural setae; bend of 
vein M rather abrupt and very remote from wing margin (Text-fig. 88); 2 + 3 dc 
setae; vibrissae above the level of the epistomal margin; basicosta reddish yellow; 
third antennal segment distinctly mucronate; head with inner eye margins strongly 
diverging ventrally, parafacials not or hardly contracted at their lower ends. 
Tribe NEAERINI 
The Australian fauna contains several little known forms that are clearly very 
closely allied to the genus Tongamyia Mesnil from Tonga and Fiji, and the 
resemblance is indeed so complete that Voriella Malloch and Tongamyia ought 
probably to be placed as synonyms (this is not considered further in the present 
work as Voriella is the older name and would not have to be changed in the event 
ofsynonymy). It is pertinent, however, that Mesnil (1960 : 649, footnote) associates 
Tongamyia with the neaerines and the genus Neaera Robineau-Desvoidy, and 
placement of Tongamyza in the Neaerini appears very reasonable on present evidence. 
As Voriella is virtually indistinguishable from Tongamyia it, too, is here assigned 
A 

