1194 
DIPTERA OF AUSTRALIA, 
Genus 29. Acrodicrania, gen.nov. 
Head ovate, fore part flattened, situated deep in tlie tliorax ; 
front broad, the anterior margin produced in a small triangle 
reaching to the basal joints of the antennEe. Eyes oval. Ocelli 
three, of unequal size, arranged in a line on the front. Palpi 
prominent, incurved, four-jointed ; first and second joints robust, 
short, the second about twice the length of the first, third joint 
much more slender and a little longer than the second, fourth 
joint very slender, not the length of the second and third 
taken together (PI. xxxii., tig. 10a). Antennae cylindrical, 
projecting forwards, arcuated, about as long or somewhat 
longer than the thorax, 2- -t- 14-jointed ; first joint of the 
scapus cyathiform, about twice the length of the second, the 
latter cupuliform, both with short setaceous hairs at the 
apex, the second joint generally with one strong seta ; 
flagellar joints cylindrical, with very short downy pubescence. 
Thorax ovate, highly arched ; scutellum nearly as wide as the 
thorax, too flattened to be semi-circular ; metathorax highly 
arched. Abdomen rather robust, with eight segments, the eighth 
segment very short and generally hidden by the seventh ; in the 
flattened, claviform, with a moderate anal joint and forceps ; 
in the 9 robust, flattened, terminating in a short ovipositor 
provided with two small terminal lamellae. Legs strong ; femora 
broadly flattened ; tibiae spurred, and having strong lateral spines 
on the intermediate and hind pairs ; fore tibiie with a range of 
minute spines on the outer and inner side, the spines on the latter 
widely separated and few; intermediate tibite with three ranges 
on the outer side and one on the inner side ; hind pair with two 
ranges on the outer side. Wings longer than the abdomen, 
moderately broad, with rounded-off base; microscopically pubescent. 
Auxiliary vein joining the costa almost over or somewhat before 
the origin of the third longitudinal vein, united to the first longi- 
tudinal vein by a sub-costal cross-vein ; costal vein extending 
much beyond the tip of the second longitudinal vein, but consider- 
ably distant from the apex of the wing ; first longitudinal vein 
