Figure 1. — The device developed for dehairing egg masses of cer- 

 tain lepidopterous insects. Air forced in through the tube loosens 

 the hairs from the egg masses, and as the air escapes through the 

 perforated cap the hairs are trapped in a filter pad. 



of a size to permit passage of the hairs but to prevent passage of the eggs. 



The screw cap is perforated with thirty 3/l6-inch holes for air out- 

 lets. A hole to receive the air inlet tube is also drilled in the cap. This 

 hole is located off center in the cap to create an effective air current inside 

 the jar. A filter pad of cotton, fiberglass, or some similar material is 

 placed inside the screw cap and is held firmly in place by a circular piece 

 of l6-mesh metal screen and a ring-shaped gasket of hard cardboard 

 (%■ 2). 



2 



