52 PROCEEDINGS OP THE ROYAL SOCIETY OF QUEENSLAND. 



The last two pairs of anterior acrostichals feebly developed ; 

 prescutellar acrostichals moderately strong. Apical scutellars 

 present. Dorsocentrals remarkably well developed ; the last 

 two pairs as usual much the largest, the more anterior ones 

 considerably larger than the prescutellar acrostichals. Two 

 intra-alars present ; three humerals ; two post-humerals, of 

 which the anterior is the larger. 



Wings. — In the wing the first longitudinal vein is hairy, 

 thus placing the species in the genus Helicobia. 



Legs black ; first femur not hairy, tibia shorter than 

 tarsus ; second and tliird legs not hairy, second femur without 

 " comb," tarsus longer than tibia ; third tibia about as long 

 as tarsus. 



Abdomen about as long as thorax, oval ; covered with 

 short recHnate bristles above, slightly hairy below ; provided 

 postero-ventrally with a few rather long bristles. First segment 

 of hypopygium greyish ; second segment very dark shiny 

 brown, hairy, tipped dorsally with light brown. Forceps 

 relatively very large, shiny black, sharply pointed, and exceed- 

 ingly hairy. Accessory plate somewhat semicircular, hairy. 

 Penis fairly heavily chitinised, bearing posteriorly two long, 

 prominent, ventrally directed processes, as figured (Fig. 24). 



Described from two males, bred from decaying meat in 

 Brisbane. H. australis is the first representative of the genus 

 to be recorded from Australasia. 



2. Sarcophaga impatiens Walker 1849 (Figs. 18, 19). 



In general appearance a large golden and black fly, the 

 male measuring about 14 mm. ; the female somewhat shorter, 

 about 12 mm. long, and much more thick-set. 



Male. — Head. — A little narrower than Avidest part of 

 thorax. Front not very prominent ; about three- fifths the 

 width of eyes. Frontal stripe very dark chocolate brown. 

 Mesofacial plates a rich golden colour, borders tinged with 

 black. Parafrontals golden, with dark reflections ; cheeks 

 bright golden. Eyes red-brown. Proboscis black and brown, 

 with golden hairs ; palps black. Back of head golden, with a 

 single row of short black bristles behind eyes. Hairs below 

 these golden, becoming very long and bright golden on cheeks. 



First antennal joint very small ; second large and very 

 dark brown, third over thrice the length of second, dark 



