mutilated, lose their instincts 309 prescience (supposed) of 118 prisoners when very young 17 reason of this _ib._ virgin, when first seek the drones 34 voice of, authoritative 128 when imprisoned 19 Reason, human, definition of 335 insect, definition of _ib._ presumptive evidence of 322 difference between human and insect 335 observations of Reid 356 of Evans _ib._ Regurgitating power of bees 229 Reimar's opinion of memory 333 Reproduction, organs of 275 ovaries 276 oviducts _ib._ ovipositor 277 sperm-reservoir _ib._ Respiration, organs of 266 evidences of their existence 267 stigmata, spiracles or breathing pores 266 tracheæ _ib._ Riem's discovery 3