Plate IX 



Fig. I. 

 Fruit fly, Drosophila femstrayiim ( x 8). Antenna. Natural size. 



Fig. 2. 

 Owl midge or moth fly, Psychoda sp. ( x 8). Antenna. Natural size, resting position. 



Fig- .^• 



Window fly, Scenopintis fenestralis , female (X5). Antenna. Natural size. 



Oval pitted area on second abdominal segment ( x 30). 



