McAlpine: Australian Helosciomyzidae 
61 
Figures 14-18. (14) Neosciomyza peckorum (Boyd River), terminal part of epandrium and associated structures, anterior view, right 
anterior epandrial process cut away for clarity, scale = 0.5 mm. (15) Helosciomyza bickeli (Cobcroft Creek), left surstylus, outer view, 
scale = 0.2 mm. (16) H. juscinevris (Clarence, near Lithgow), left surstylus, outer view. (17) same specimen, right surstylus, outer view. 
(18) H. subacuta (Wannon River), left surstylus, outer view. Figs 15-18 all same scale, aep, anterior epandrial process; bsp, basal surstylar 
process; c, cercus; ep, epandrium; .s.s, surstylus. 
Wilson (AM); 8 km S of Mount Wilson (AM); Roberts Creek, near 
East Kurrajong (AM); Narrabeen, near Sydney (AM); Willoughby, 
near Sydney (AM); Oxford Falls, near Sydney (AM, ANIC); 
Sydney (AM); Royal National Park (AM); Otford (AM). Tasmania: 
Frodshams Pass, near Mount Wedge (AM). 
Description (male, female). Medium-sized brownish- 
variegated fly of medium build, with almost unmarked wing; 
most parts pruinescent and non-shining. 
Coloration (dry, clean, non-greasy specimens). Head 
rufous to pale tawny dorsally with pale grey pruinescence 
on median zone enclosing postvertical and ocellar bristles 
and extending narrowly well in front of anterior ocellus 
and usually more than half distance from ocellus to ptilinal 
suture; fronto-orbital plates greyish pruinescent; fronto- 
orbital margins narrowly more silvery pruinescent; upper 
occiput extensively grey-pruinescent, usually with tawny spot 
between each outer vertical bristle and eye margin; face and 
cheeks pale tawny-yellow with whitish pruinescence. Antenna 
largely tawny; segment 3 tawny-orange with at most very faint 
brown suffusion not forming distinct dorsal or distal zone; 
arista largely brown, tawny at extreme base. Prelabrum and 
palpus tawny-yellow, latter with black setulae and bristles. 
Mesoscutum orange-tawny, with broadly creamy-grey lateral 
margins and five additional pale grey longitudinal stripes— 
median and paired dorsocentral and sublateral; sublateral 
stripe narrow, not extending in front of suture and usually 
