120 
Psyche 
[March 
Table 2. The utilization of food by 4th instar larvae of the black swallowtail 
P. pol yxenes, when reared on various species of cultivated and wild umbel lifer food 
plants (Mean ± SE). Common names of plant species can be found in Table I. 
Plant species 
Total food 
ingested 
(mg) 1 * 2 
Duration of 
4th in star 
(Days) 1 , 3 
Approximate 
digesti- 
bility 1 *** 
Efficiency of 
conversion of 
i ngested 
matter 1 ' 5 
Cultivated species 
Anethum qraveolens 
II2.9I± 8.26 
3.0610.17 
55.8612.09 
37.0412.86 
Api urn qraveolens 
196. I4± 5.48 
2.9910.06 
64.9410.89 
21.4510.57 
Carum carvi 
147.741 3.86 
2.9010.03 
54.7410.77 
27.8810.36 
Coriandrum sativum 
191.091 4.70 
2.9710.02 
46.3310.98 
22.8810.66 
Daucus carota 
150.631 5.92 
3.5510.09 
55.0712.00 
29.9910.96 
Foeniculum vulqare 
1 I7.90H2.I5 
3.0710.19 
56.4912.02 
31.9711 .70 
Liqusticum scothicum 
120.951 5.07 
2.9810.01 
48. 1 111 .53 
14.0510.81 
Pastinaca sativa 
145.151 6.16 
3.3310.07 
49.6410.70 
25.2310.23 
Petroselinum cri spurn 
129.821 5.76 
3.4710.06 
57.9912.86 
31.0411 .48 
Pimpinel la ani sum 
123.961 6.21 
•3.0710.17 
43.5511 .48 
14.2010.93 
Wi Id species 
Aeqopodium podaqraria 
154.211 5.43 
2.8210.05 
48.0212.58 
21.1411.23 
Aeqopodium variqatum 
170.921 4.61 
2.9310.06 
52.4011.13 
24.8110.61 
Aethusa cynapium 
168.151 6.24 
2.9710.01 
47.I6H.06 
18.5211.74 
Anqelica atropurpurea 
I86.69H3. 14 
2.8610.06 
60.1513.57 
18.6511 .41 
Anqelica triquinata 
86.381 6.39 
3.-0910.26 
42.6311.33 
29.5111.35 
Cicuta bulbifera 
122.371 9.82 
2.8610.23 
47.6813.87 
14.8010.72 
