1912.] NATURAL SCIENCES OF PHILADELPHIA. 32) 
any one species of bird, though a good many birds take these insects 
at times. A long series of experiments with regard to birds taking 
protectively colored or distasteful insects and especially butterflies 
was made by Mr. Finn..... They have little importance to 
economic ornithology, since most of the experiments were conducted 
with caged birds, these, therefore, being under unnatural conditions.” 
2. “That many, probably most species, dislike, if not intensely, 
at any rate in comparison with other butterflies, the ‘‘warningly 
colored”? Danaine, Acrea viole, Delias eucharis, and Papilio aristo- 
lochiew; of these the last being the most distasteful and the Danainze 
the least so” (p. 667). 
By consulting the tabulation of acceptances and rejections given 
above, it will be seen that only two out of fourteen species of birds 
considerably experimented with failed to take as many or more 
insects of the ‘‘nauseous” group than they refused, and that seven 
of these fourteen species refused as large or a larger proportion of 
the “palatable” butterflies as of the “nauseous” ones. Conse- 
quently the assertion in Conclusion 2, at least as regards the Dan- 
ainz, is not borne out even under experimental conditions; it should 
read, about half of the species of birds considerably experimented 
with showed in captivity a greater or less degree of preference for 
butterflies of the ‘‘palatable’”’ group. The figures show that about 
30 per cent. of all ‘‘nauseous”’ butterflies tested were refused, as were 
about 13 per cent. of the ‘‘palatable” ones. About 23 per cent. of the 
Danais (average of three species) and of the Euploeas were rejected, 
proportions nearly as small or smaller than in the case of at least three 
species of the so-called palatable group, namely, Papilio demoleus, 25 
per cent.; Atella phalanta, 22 per cent.; and Elymnias undularis, 24 
per cent. 
The approximate numbers of refusals and acceptances and the 
percentage of refusals for the important species of both groups are 
given below: : 
‘*Nauseous”’ group. 
: R. QR. 
Danais chrysippus.... . .. 186+ 38 21.8 
£6 GJeNUbr..n. oo. os apie 59+ 23 28 
« — limniace......... Sn =O8+ 9 19.1 
Deltas eucharts......2...... : . 13 19 59.3 
Eupleea sp........ sae Se eee OS 16 22.8 
Euproctis sp... 11 2 15.3 
Mylabris sp......... is ee oo 1 50 
Papilio aristolochie.......0.0. =... AT 33 66 
YS) | 11 4 26.6 
ACPO VIOLC cece coe a oe 3. 5 62.5 
