. Elementary entomology . Fig. 231. Work of the round-headed apple-tree borer. (Natural size) rt, puncture in which egg is laid ; b^ same in section ; r, hole from which beetle has emerged ; /, same in section ; g, pupa in its cell. (After Riley) 159

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Keywords: ., bookcentury1900, bookdecade1, booksubjectentomology, bookyear1912