PLATE XL1I 



Figure 1. Two eggs of Tabanus bicallosus. 



Figure 2. Egg mass of the same laid on a blade of grass. 



Figure 3. Eighth abdominal segment of pupa of male of same, 



showing the six large tubercles. Note the ribbed anal 



tubercle and the continuous fringe of spines in 



front of it. 

 Figure 4. Eighth abdominal segment of pupa of female of same. 



Note the simple anal tubercle and the interrupted 



fringe of spines in front of it. 



Figure 5. Mature larva of Tabanus bicallosus. x 3. 

 Figure 6. Pupa of same, x 4. 

 Figure 7. Mature larva of Tabanus ditaeniatus. Note the 



short stout syphon tube. X 3. 

 Figure 8. Pupa of same, x 4. 



Figure 9. Eighth abdominal segment of pupa of same. 

 Figure 10. Egg of Tabanus ditaeniatus. 

 Figure 11. Egg mass of the same fly spread out in a single layer 



on a blade of grass. 

 Figure 12. Egg mass of Chrysops dtspar, on a blade of grass; 



also a single egg enlarged. 

 Figure 13. Mature larva of Tabanus v it-go. The openings of the 



tracheae are flush with the body. X 4. 

 Figure 14. Pupa of same. X5. 



Figure 15. Small egg mass of same laid on a dried twig. 

 Figure 16. Eighth abdominal segment of pupa of same. 



