88 PROCEEDINGS OF THE ROYAL SOCIETY OF QUEENSLAND. 



Sarcophaga tryoni J. & T. 



During the Avinter this large golden fly takes 7 days to 

 pass through its larval feeding stage, 7 to 8 days for the larval 

 resting or prepupal stage, and 7 weeks to complete its pupal 

 stage. 



Sarcophaga impatiens Walker. 



Sarcophaga omikron J. & T. 



The pupal stage (bred from decaying potato) in the Upper 

 Burnett district during January 1920 was about 13 days 

 {M. J. Bancroft). 



Ophyra nigra Wied. 



This shining black Anthomyid blowfly is extremely 

 common in Southern Queensland and in New South Wales, 

 and is readily attracted to carrion, where it may be collected 

 all the year round. 



In Brisbane the eggs usually require 24 to 25 hours for 

 hatching. The larva feeds for 5 or 6 days and then passes 

 through a resting stage varying in length from 7 to 11 days in 

 summer and from 3 to 4 weeks during winter. The pupal stage 

 lasts for about 8 days in summer and 2 to 3 weeks in winter. 

 The period elapsing between the deposition of the egg and the 

 emergence of the resulting fly is about 20 days in midsummer, 

 increasing to about 30 in autumn and spring, while during 

 winter about 10 weeks are required. In about 5 days after 

 emergence, copulation occurs, egg-laying taking place within 

 1 or 2 days. The fly lives for about a month in captivity. 



