Plate II 



Fig. I. 



House-fly, Mtisca dotnestica, male ( x 3). Head of female, dorsal view. 

 Antenna. Natural size, resting position. 



Fig. 2. 



Raven fly, iMiisca corvina ( x 5). Fig. 2. Male. Fig. 3. Female. 

 Antenna. Natural size, resting position. 



Fig. 4. 

 Full-grown larva of Blow-fly, C. eiythrocephala ( x 3). 



