Bull. 1089, U. S. Dept. of Agriculture. 



Plate XXIV. 



Fig. I. — Yearling Skin Infested with Warble Grubs. 



A))out 1,003 larvae of tho warble fly {Ocdemagena tarandi) were counted on the back. With such 

 a number the hide was practically riddled, one hole being punctured by each grub. More 

 parasites were counted on the right side than on the left. 





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Fig. 2. — Near View of Above Skin. 



In a line along the backbone the sliin is free from grubs, explained, no doubt, by the pressure 

 and movements of the bone. 



