PROC. ENT. SOC. WASH., VOL. 21, NO. I, JAN., 1919 !'! 



Hatching Record. 



In left pocket, 122 eggs, 3-5 days old, none hatched. 

 In right pocket, 225 eggs, 1-3 days old, none hatched. 

 Check lots, 1 15 eggs, 3-5 days old, 76 hatched, (50%. 



160 eggs, 1-3 days old, 152 hatched, 95%. 



Experiment 5. Gasoline-kerosene wash and gasoline rinse. 



Another coat with eggs in the pockets was 



Washed 15 minutes in same fluid as Experiment 4. 



Extracted. 



Rinsed In minutes in gasoline (60 Baume). 



The eggs were removed after the rinse and returned to pill boxes 

 and kept in the incubator. 



Hatching Record. 



In left pocket, ca. 250 eggs, 3-5 days old, 62 hatched, 25%. 

 In right pocket, ca. 325 eggs, 1-3 days old, 202 hatched, 62.1% 

 Check lots, same as for Experiment 4. 



Experiment 6. Gasoline-kerosene wash and gasoline rinse. 



Another coat with eggs was 



Washed ,.':>() minutes in same fluid as Experiment 4. 

 Extracted. 

 Rinsed 15 minutes in gasoline (60 Baume). 



Eggs were then removed from pockets and kept under same 

 conditions as in previous experiments. 



Hatching Record. 



In left pocket, 160 eggs, 3-5 days old, 23 hatched, 14.3%. 

 In right pocket, 140 eggs, 1-3 days old, 66 hatched, 47.1%. 

 Check lots, same as in Experiment 4. 



Experiment 7. Gasoline-kerosene wash and gasoline rinse-. 



Another coat with eggs was 



Washed 45 minutes in same fluid as Experiment 4. 



Extracted. 



Rinsed 15 minutes in gasoline (b'U Baume). 



Eggs were then removed from the pockets and kept under the 

 same conditions as in previous experiments. 



Hatching Record. 



In left pocket, 175 eggs, 35 days old, 19 hatched, 10.8%. 

 In right pocket, 128 eggs, 1 3 days old, 37 hatched, 28.9%. 

 Check lots, same as Experiment 4. 



