PLATE XV 



FIG. I. THE WINTER MOTH. MALE 

 AND WINGLESS FEMALE 



FIG. 2. UNDER SURFACE OF A ROSE-LEAF 

 SWARMING WITH Al'HIDES 



FIG. 3. EGGS OF THE HOUSE-FLY 



FIG. 4. TRYPANOSOMES OF SLEEPING 

 SICKNESS, TRANSMITTED FROM MAN- 

 TO MAN BY THE BITING FLY GLOSSINIA 

 PALPALIS 



