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Psyche 5:30, 1888.

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PSYCHE.
[March 188s.
PSYCHE.
CAMBRIDGE, MASS., MARCH 1888.
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CURIOUS PUPA OF PIERIS.
Some time ago I found a pupa-skin of
Pieyis ya$ae in the cell of a deserted nest of the common paper-wasp (Polistes). It was fastened into'the cell by the end, in the usual way, but I cannot be certain about the girdle ; if there was any I failed to see it. This is the only instance in which I know of this species seeking such a place of concealment. C: w: Wood-sio~th.
PARASITES STINGING PUPAE OF
PIERIS RAPAE.
In looking over the American entomologist for 1880, I came upon the following state- ment, on page 126,-
" CABBAGE-WORM PARASITE.-We notice
that correspondents of the agricultural and horticultural press when referring to the Pteromalus /zqhmvz, or imported cabbage- worm parasite, generally state that the female fly deposits her eggs in the pupa orchrysalis. This, however, is incorrect, as any one can discover by gathering some of the infested full-grown caterpillars and placing them in a close box to undergo their transformation." Unless the "Imported cabbage-worm" has
more than one parasite this is an incorrect correction! In the summer of 1883 great
numbers of Pieris r4ae laid their eggs on nasturtium (Trofieoluiii) leaves by the side of our house.
I watched the young larvae
through all their changes, noted the great number of tiny parasitic flies. and watched the egg-laying of the latter. Many laid their eggs in half-grown or fully grown larvae. Many also punctured larvae which had sns- pended for pupation, and as many laid their eggsin the iery fresh pupae, stinging them usually between the abdominal segments.
I saw no parasite sting a pupa which was more than an hour old, but that may have been because it had been stung either as fresh pupa or larva.
Out of forty pupae which I watched, and
took down after they were a day old, I got not one imago of Pieris ya$ae, but plenty of small flies. I am not sure of the name of these flies, for 1 was not interested in the parasites then, and took no pains to identify them.
That pupae are never stung by parasites
does not seem to be proved by the fact that parasites will emerge from "infested full- grown caterpillars" which are taken and put in a close box to undergo their transforma- tion." Like so many disputed questions
both side are true, I did not know there was any question about it until, in looking for something else, I came upon this statement. Caroline G. Sotile.
EGG-LAYING OF LIMENITIS
DISIPPUS.
Miss Soule's note (PSYCHE v. 5, p. 14),
interested me very much. Riley records an instance of three eggs laid on a single leaf, but I have never seen so extreme a case, and with hardly an exception have found the
eggs laid singly. Is Miss Soule confident that the several eggs on a given leaf were all laid by the same butterfly? Was there any disparity in the time of their hatching? It would be interesting to know what difference there might be. In one instance where I saw two eggs laid within five minutes of each other, one hatched from eighteen to twenty hours after the other.
Samuel H. Srtida'er.




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