] 98 [February, 



wrinkle a little beyond the middle ; sometimes faint indications of one 

 or two more occur near the end, without detracting from the general 

 plumpness of outline ; the segmental divisions are well cut, the anal 

 flap plumply rounded off behind ; the tumid ridge below the spiracles 

 is very prominent, the belly flattened and deeply wrinkled ; the dorsal 

 tubercular dots each with a fine hair are arranged rather in a square 

 than a trapezoidal figure ; the spiracles are very flat, situated just 

 below each lateral wart where the skin is very plump, and in no way 

 hidden or protected by any wrinkle or fold : the colour is generally 

 black or blackish-brown, sometimes a little bronzy, the head having 

 a pale bar of greyish-drab across the upper lip, the papillae of the 

 same pale colour, all the legs drab ; the belly appears like rather worn 

 bronze, the spiracles are black like the skin around them, and there- 

 fore are rather difficult to discern. 



The pupa is about 13 mm. in length, and nothing unusual in 

 form ; the moveable segments of the abdomen are deeply cut, and 

 furnished at the tip with four fine curly-topped spines ; its colour is 

 of a dark brick-red, and with a dull surface, though in the divisions 

 of the moveable rings it glistens a little. 



The cocoon, firmly attached to some solid surface, is of broad-oval 

 form, composed of greyish silk, on which the spines of the pupal tail 

 obtain a firm hold ; it is covered externally with particles gnawed 

 from the surface of its surroundings, whether of rubbish, or of mortar, 

 like those from the Exeter canal stable, or indeed of paper, as I found 

 many years since, when a cocoon was spun in a box of that material. 



There now only remains for me to state that on two or three 

 occasions, when I had a larva out before me to examine, I did not 

 neglect to test the grease theory, by leaving butter and lard with it 

 under a large glass, but in every case it seemed carefully to shun both, 

 and though I contrived once that it should at least walk over some 

 lard, it did so nimbly enough, but could not be induced to walk over 

 it a second time, invariably swerving aside. As a final experiment, I 

 turned a large but still feeding larva out from its dwelling into a pot 

 containing three pieces of cloth, one piece lightly saturated with salad 

 oil, the second bearing a lump of fresh butter, and the third a lump of 

 lard, and tied over the pot a cover of calico ; on being placed therein, 

 the larva soon came in contact with a piece of cloth, and stopped as 

 though afraid to advance any further ; but on my looking next day I 

 could only see the tail of the larva protruding from beneath the lard- 

 bearing cloth, and on my touching it with a soft brush very gently it 

 instautly sprang forward, concealing itself entirely under the cloth ; 



