101 



covered and placed in the growth chamber. After 2k hr, the temperature 



TM 

 of the medium in each pan was measured by use of a Taylor dial thermo- 

 meter. Pans were divided into quarters and temperature measurements 

 taken from the centers of the pans and from the centers of the quarters. 

 The temperatures of the media were recorded every 2k hr from day 1, i.e. 

 2k hr after eggs were set, through day 7 of the larval development 

 period. On day 7, pupae in the treated pan were floated and the experi- 

 ment was terminated. 



Resul ts. The daily temperatures of larval media as influenced by 

 0. aenescens larvae over the 7 - day larval development period are shown 

 in Table 10. The medium with larvae showed a daily increase in tempera- 

 ture, reaching k2.k C on day 2 and then declining to 30.0 C on day 7. 

 The medium without the larvae also peaked on day 2 at 33-7 C and declined 

 to 28.7 C on day 7- Elevated temperatures in the medium with the larvae 

 were attributed to larval interaction with the medium. Daily differences 

 in temperature between the two pans were all significant (p < .01). 



Competition studv between Gvhura aenescens and Musaa domestica. In 

 this trial, 180-ml cups containing SO ml of diet were used with four 

 replications per treatment. First-instar larvae of both fly species 

 were used to seed the diets. Experimental design and diet used are 

 shown in Table 11. Treatments consisting of only one fly species were 

 used as controls. Cups with larvae were covered with screen and placed 

 in the growth chamber. Adults were allowed to eclose and die before 

 they were counted. 



Resul ts . The results of the competition study between 0. aenescens 

 and M. domestica are shown in Table 12. In all treatments where house 

 flies and dump flies were developing together, house fiv mortality was 



