An experimental study was conducted to assess effects of odour attractants on catch size of Glossina pallidipes Austen and Glossina fuscipes fuscipes Newsteed at Sor Hydroelectric station around Sor River, West Ethiopia. Various doses of acetone, octenol and cow urine were used as odour attractants with monopyramidal traps. Three 5x5 Latin squares method was used making a total of 15 replicates. Acetone released at dose rate of 150mg/hr and 500mg/hr with 0.5mg/hr octenol and 1000mg/hr cow urine were found to be most effective in increasing catch size of Glossina pallidipes Austen by up to 11.26-12.54 times. Acetone released at dose rate of 2000mg/hr in combination with 0.5mg/hr octenol increased the catch only up to 4.07 times but cow urine alone produced increases in catch size by 2.54 times. In the trial performed for Glossina fuscipes fuscipes Newstead, 0.5mg/hr octenol, 500mg/hr acetone and 1000mg/hr cow urine were used alone and in combination, the catch number of samples from baited and unbaited (control) traps differed slightly. There were no significant repellent or attraction effect as the efficiencies were at roughly the no odour level. In conclusion, cow urine (1000mg/hr) with octenol (0.5mg/hr) and acetone (150 and 500mg/hr) was considered to be a potentially useful combination of baits for Glossina pallidipes Austen control and sampling. However, further study should be conducted on behavior and baites used to attract Glossina fuscipes fuscipes Newstead in the study area.