1144 
DIPTERA OF AUSTRALIA, 
brevissima sub-quadrata, secunda longissima arcuata, apicem alae 
formante ; sub-marginali longa, arcuata, posticis tribus (secunda 
cum cellula basilari secunda confusa). Tibiae apice calcaratae, 
caeterum inermes.” 
Genus 56. Platyroptilok, Westw. 
“ Sub-genus novum Platyuris typicis affine, attamen antennis 
flabellatis distinctum. Caput mediocre, baud rostratum, oculis 
inaximis subtus basin antennarum conjunctis : ocellos 2 magnos 
approximates tantum vidi. Os indistinctum. Antennae breves, 
12-articulatae, articulis brevibus, 3-11 singulatim raraum longum 
pilosum emittentibus, 12mo elongate. Alae absque cellula parva 
sub-quadrata, vena Ima longitudinal! ante apicem ramulum 
parvum obliquum, ad costam extensum, emittente. Pedes satis 
graciles et elongati, posticorum tibiis calcaribus duobus acutis 
armatis, articulo Imo longo et reliquis parum crassiori. Abdomen 
elongatum gracile.” 
Genus 57. Diomonus, Walk. 
“ Resembles Platyum as regards its antennae, Avbile its wmgs 
are those of Lp.ptomorplius, except that tbe areola under tbe 
anterior mai'gin of tbe wing, absent in that genus, is present in 
this.” 
06s. — Fi’om tbe above it appears that Diomonus belongs to tbe 
Sciopbilinai, and should probably come near Erniiheria ; Walker 
in his “ Notes on Diptei’a ” puts this genus amongst tbe Cerato- 
plinae (Ceroplatinae), between tbe genei'a Platyroptilon and 
Asindtdum, evidently regarding the structure of the antennae of 
more importance than the venation of tbe wings. 
Genus 58. Pseudosciara, Sch. 
“ Head roundish. Eyes reniform. Front broad. Ocelli two. 
Antennae 2- -f 10-jointed, the flagellar joints longer than broad, 
cylindrical, finely haired. Palpi incurved, four-jointed, thick at 
the base, the last two joints very long and slender. Thorax 
moderately arched, without a transverse suture. Scutellum small. 
