form, the wing-covers well developed with their nervures in strong 

 relief, the abdominal segments are smooth and very lightly defined, 

 the anal tip is furnished with several minnte curly-topped spiny 

 bristles, which are thrust into the silk and held fast ; its colour is 

 green, having beyond the thorax the two white sub-dorsal stripes 

 which marked the larva, these gradually fade away as it matures, and 

 the wing-covers turn very pale, then afterwards quite dingy, and at 

 about 9 o'clock the next morning the perfect insect is disclosed. 

 Emsworth : July 12th, 1882. 



A LIFE HISTORY OF FAPILIO P^ON, ROGER. 

 BY J. J. WALKEE, E.N. 



It had, for some time, been a matter of surprise to me, that among 

 the butterflies observed in the vicinity of Callao, the genus Fapilio 

 was not represented : and it was, therefore, with no small satisfaction 

 that, on January 13th, I captured a somewhat worn example of a 

 grand black and yellow " swallow-tail," Fapilio Fceon, closely related 

 to, but apparently quite distinct from, the noble Fapilio Thoas, L., 

 which I had met with not rarely at Panama. 



During the next few days, I searched assiduously for the insect, 

 and succeeded in finding its head quarters, about three miles from 

 Callao. It was, however, by no means common, and the few speci- 

 mens caught were invariably in poor condition. At last, one very 

 warm afternoon, I noticed a worn ? hovering over a double row of 

 parsnip-plants, in a small patch of cultivated ground, evidently de- 

 positing eggs. I at once got up from the bank on which I was 

 lounging, and examined the plants : before long, I came upon a little 

 caterpillar, which presented such a wonderfully close resemblance to 

 a piece of fresh bird's-dung, that I at first hesitated about taking it 

 up. It betrayed itself, however, as a Fapilio larva, by protruding a 

 forked tentacle from the 2nd segment : so I continued the search, and 

 soon had forty of these little fellows in my larva-box. 



The internal arrangements of a man-of-war do not afford any very 

 great facilities for larva-rearing, and I was at first a little puzzled how 

 to dispose of my captures. By covering a good-sized fruit-basket with 

 leno, and hanging it up to a beam in my cabin, I made an extempore 

 breeding-cage, in which the larvae throve as well as could have been 

 desired. The larvse continued to occur freely on the aforesaid parsnip- 

 plants (the only ones I could find), and at the end of February, I had 

 the pleasure of rearing a noble series of the perfect insect. 



