1 1 6 
Psyche 
[March 
Table I. Dry weight, calorific values and nitrogen content of various species 
of Umbel liferae offered to the larvae of the eastern black swallowtail. 
Pap? I io polyxenes, during the 4th instar. 
Plant species 
Mean percent 
dry material 
in leaves 
± SE 1,2 
Mean calories 
per mi 1 1 i gram 
dry weight of 
leaf material 
± SE 1 » 3 
Mean percent 
of nitrogen 
in leaf materia 
± SE 1 » 4 
Cultivated species 
Anethum qraveolens 
8.58 
± 
0.15 
4.00 
±0.11 
5.48 
± 0.27 
Di 1 1 
N 
= 
20 
Apium qraveolens 
15.90 
± 
0.48 
3.94 
± 0.21 
3.57 
± 0.10 
Celery 
N 
= 
28 
Carum carvi 
15.10 
+ 
0.37 
4.31 
+ 0.10 
4.81 
± 0.16 
Ca raway 
N 
= 
34 
Coriandrum sativum 
1 1 .63 
+ 
0.36 
4.36 
± 0.07 
4.93 
± 0.31 
Cor iander 
N 
= 
36 
Daucus carota 
8.96 
+ 
0.29 
4.05 
± 0.22 
5.31 
± 0.09 
Carrot 
N 
= 
42 
Foeniculum vulqare 
7.64 
+ 
0.16 
4.01 
± 0.09 
5.45 
± 0.31 
Fennel 
N 
= 
16 
Liqusticum scothicum 
15.27 
± 
0.68 
4.1 1 
± 0.26 
2.80 
± 0.17 
Scotch lovage 
N 
= 
29 
Pastinaca sativa 
16.00 
+ 
0.27 
4.44 
± 0.37 
5.12 
± 0.40 
Parsnip 
N 
= 
33 
Petroselinum cri spurn 
8.83 
+ 
0.21 
4.03 
± 0. 17 
5. '52 
± 0.19 
Parsley 
N 
= 
24 
Pimp i ne 1 la an i sum 
14.65 
+ 
0.37 
3.83 
± 0.09 
2.83 
± 0.07 
An i se 
N 
= 
37 
Wild species 
Aeqopodium podaqraria 
21.87 
± 
0.22 
4.42 
i+ 
o 
04 
4.60 
± 0.31 
Goutweed 
N 
= 
22 
Aeqopodium variqatum 
20.73 
± 
0.31 
4.30 
± 0.22 
3.03 
±0.11 
Goutweed 
N 
= 
39 
Aethusa cynapium 
1 1 .56 
+ 
0.23 
4.06 
± 0.17 
3.68 
± 0.23 
Fools parsley 
N 
= 
39 
