395 



1. Dull-coloured, brownish flies, seven to twelve 

 mm. long (excluding proboscis and wings). 



2. Wings in resting position, closed flat, one over 

 the other, scissors-like, projecting beyond the abdomen. 



-^ 



' 



fl\ , /{ 



- .; f* , ' ;& 



mfils^ (A/ if/ / 1 H 



Fig. I2SA. 



(i). Stomoxys calcitrant. Inner surface of the labellum shewing 



five cutting teeth and various other structures. These teeth are 



completely everted during the act of biting. 



(After Stephens and Newstead) 



3. Proboscis ensheathed in palpi, projecting 

 horizontally in front. 



