THE CANADIAN ENTOMOLOGIST. 13 



into a sort of tarpaulin by liquid excretions; this is then retroverted 

 and dangles over the creature's back like an umbrella. I wonder 

 if any of you ever came across an old book called the "Voyages and 

 Travels of Sir John Mandeville?" This mediaeval De Rougemont, 

 borrowing some of his choicest traveller's tales from Herodotus, 

 Pliny and others, describes a one-legged race of men in Africa who 

 go so fast that (as the author justly observes) it is marvellous. As 

 disuse leads to atrophy, much use produces hypertrophy, and 

 Mandeville declares these one-legged men have developed such 

 enormous feet that in the heat of the day they sit on the sand and 

 hold their foot as a parasol over their head. In my edition of the 

 work there is a woodcut illustrating this description, in which a 

 native is seated on his one haunch (how to balance one's .self must 

 be as great a problem with that race as Columbus tackled in the 

 hen's egg) shading himself from the sun with his foot over his head. 



Some naturalists think that these larva? are seeking protection 

 from the sun in spreading this forked process over their back. But 

 it seems more likely that they do it to escape detection by some 

 bird foe for whom they would be a dainty morsel. What makes 

 me think so is that the pupa, too, is protected in a curious way. 

 The full-grown larva pupates attached by some silk thread to the 

 leaf, more or less exposed and helpless, but, as soon as the pupa 

 forms, almost its entire surface turns greyish or bluish white; it 

 looks like a creature that has died and been attacked by fungus- 

 growth of mildew. It so deceived me that I was on the point of 

 throwing specimens away. It was only when I took one between fin- 

 ger arid thumb and felt it writhe firmly under my touch that I realised 

 the deception. Doubtless one more case of protective mimicry. 



Now, gentlemen, we are nearly home. We skirt the side of 

 Corbett's Pond, where in May you will sometimes find on the mud 

 flats seven or eight species of plover and sandpiper at a time and, 

 passing along Hope Street, turn up a lane near the C. N. R. bridge 

 at Ontario street. This takes us to DeBkiquiere street, and one 

 block down brings us to the plantation of young trees sent from 

 Guelph to Trinity College School a few years ago. Here we cross 

 the cricket ground and gain the school, my home for more than 

 twelve years. We have been out all day and walked some 15 miles 

 and I seem to have done a great deal of talking. I only hope I 

 have not wearied you. 



