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Fig. 1.— C. S. 1696. Borer in Surcliarum spontaneum stem ; a, larva (>2g) ; 

 h, pupa (2*) ; c, moth (> 25) ; t1, egg ( 2^). 



Fig. 2.— Annual life-cycle of Borei in Sacchariim spontaneiim (C. S. 1696). 



