DIPTERA 
d. Media arises at the base of the unnfr. basal section may be 
delicate and foldlike . 
e. R ends in the casta (PI. 3, Fig. 19). 
ee. R^+jends in R, (PI. 3, Fig. 17) 
dd. Media apparently arises at the crossveins, i. e. its basal 
section wanting. 
e. R^j^s short, less than half as long as R^+s (PI- 3, 
Fig. 15, 16). 
f. Antennae with 2^14 joints, somewhat compressed 
(PI. 3, Fig. I 5, I 6) 
ff. Antennae with 2~\-iJ joints, « almost cylindrical » 
(PI. 3, Fig. 18). Australian genus . 
ee. R^+j more than half as long as R^+s- 
f. Petiole of the media distinct (PI. 3, Fig. 2 I ) . 
ff. Petiole of the media obliterated (PI. 3, Fig. 22). 
g. Genus Hesperodes, Coquillett. 
10. Genus Apemon, nov. gen. 
11. Genus Platyura, Meigen. 
12. Genus Pseudoplatyuka, Skuse. 
1 3. Genus Nervijuncta, Marshall. 
14. Genus Casa, Hutton. 
I. Genus ARCTONEURA, Hutton 
Arctoneura. Hutton, Index Fauna Nov. Zeal. p. i33 (1904). 
Cyrtoneura. Marshall (not Macquart), Trans. New Zeal. Instit. Vol. 28 (i8g5), p. 262 (1896). 
Characters. — Head oblong, broader than long, front not flattened. Eyes large, oval, 
* emarginate, meeting above the antennae. Ocelli three, large, the central one being situated in front of 
the others. Epistome setose. Proboscis prominent, rather longer than the palpi (PI. I , Fig. I 9). Palpi 
four jointed ; first joint short, about as broad as long ; second joint long and greatly swollen, broadest in 
the middle; third joint rather shorter, cylindrical, much narrower than the first two joints; fourth joint 
slender, cylindrical, longer than any of the others. Antennae shorter than the thorax, 2+ 1 5 jointed. 
First joint of scapus cupuliform; twice as long and twice as broad as the second, which is also cupuli- 
form; joints of flagellum cylindrical, length about three times the breadth, covered with a dense 
pubescence, central portion of each joint with stout setae. Thorax strongly arched, its surface covered 
with a thin pubescence; lateral margins with stout setae. Scutellum small, fringed with long setae. 
Metathorax acclivous. Abdomen rather slender, broadened rather posteriorly, slightly pubescent, seven 
segmented. Forceps of male large, almost flabelliform, not chelate, covered with setae. Legs long and 
slender; coxae stouter than the femora, setiferous at the tip and on the outer surface; femora very 
slender, slightly pubescent; tibiae long and slender, in the fore leg shorter than tarsus, in intermediate 
leg about as long as tarsus and in posterior leg nearly twice the length of tarsus, fore and intermediate 
tibiffi with practically no spines, but posterior tibiae with two ranges; spurs rather short; tarsi pubescent, 
with a few small prickles. Wings about as long as abdomen, rather scaly near posterior margin, and 
hairy at the apex, remarkably rounded at apical end, and cuneiformly narrowed at the base. Subcostal 
vein rather more than one-third the length of wing, disappearing just before reaching the margin ; 
Rt more than two-thirds the length of the wing; cell R one-third the length of the wing; the second 
segment of the petiole of the radial sector (the coalesced portionjlonger than the third segment; R2+3 very 
much arcuated, running very gradually into the costa; R4^-5 very strongly arcuated, joining the costa 
almost at the apex; costa slightly produced beyond tip of R4+5; media forks beyond the base of R24-3; 
Cui only slightly arcuated; anal vein long and slender but incomplete (PI. 3, Fig. I I). 
