144 THE CANADIAN ENTOMOLOGIST. 



Hawthorn bush which I had set in my garden years ago expressly that I 

 might some day have food for larva of Tarquin, and on which there had 

 been myriads of aphides a few weeks before. But I now found none. 

 The elms were visited with same result. At last I found a few on weep- 

 ing willow, and put them in a glass tube with the larvae. I watched some 

 time, but there was no haste on part of the larvae. I saw one of them go 

 to an aphis, nose at it, push it and bite at it, lifting it partly off the leaf 

 (the aphis being the larger of the two) and shaking it as a dog would 

 shake a rat. But the victim escaped and retreated to the reverse side of 

 the leaf, and the larva rested. Next morning, not an aphis was to be 

 found. I got another small supply of willow aphides and presently saw 

 a larva bite an aphis near the head and eat into the body so that its own 

 head was buried, the aphis not resisting, nor even removing its sucker 

 from the leaf. Afcer a moment the larva let go and went its way. 



Not finding more aphides on willow, I searched many trees and shrubs 

 in vain, but at last found a young wild plum somewhat infested with them, 

 and thereafter had a moderate supply. But there soon began to arrive 

 boxes of twigs of alder covered with large woolly aphides, and eggs and 

 larvae in all stages, sent by Miss Morton. The young larva (and the 

 habit continues through the two earlier stages) pushes its way under the 

 large aphides, or in case of such as are found on plum and willow, among 

 them, and forthwith begins to spin for itself a loose web, not close enough 

 to conceal it from view were the aphides away, but sufficient to keep the 

 aphides from walking over the body, and to protect it when the moult is 

 approaching and the skin sensitive. The web seems to be just about the 

 length of the larval hairs from the body. The aphides may be seen run- 

 ning over it, and often get their legs fast in the meshes, and are very apt 

 to be devoured as a consequence. Receiving these other eggs and larvae, 

 I had pretty soon become satisfied that these hairy larvae were of Tarquin. 

 The first stage was about two days in duration. 



At first moult, the body was not so round, but a little flattened, and a 

 little broadest in middle, the dorsum not raised, the legs and feet not re- 

 tractile ; the head a little within 2, but not more than with a Papilio larva ; 

 body clothed with many long hairs disposed in six rows, two sub-dorsal, 

 one on mid-side, one along base j the hairs not in tufts but in groups, 

 which spring from low tuberculous swellings ; the hairs from base falling 

 down and fringing the body ; on 2 a chitinous band and in front of it 3 or 

 4 rows of long hairs which fall over head. 



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