. Elementary entomology . Fig. 129. A dragon-fly and its development Nymphs feeding at / and j, showing extension of underlip or mask and the way prey is grasped by it; 2, mature nymph ready to molt; 4, skin of nymph from which the adult (j) has emerged. (After Brehm) 99

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Keywords: ., bookcentury1900, bookdecade1, booksubjectentomology, bookyear1912