1975] 
Erickson — Papilio polyxenes 
21 
Table 2. Ccn+inued. 
Plant species 
Tota 1 food 
ingested 
(mg) 1 # 2 
Duration of 
4th instar 
(Days) 1 . 3 
Approximate 
digesti- 
bility 1 * 4 
Ef f iciency of 
conversion of 
ingested 
matter 1 * 5 
Cicuta maculata 
1 57.38±l 4.29 
2.69±0.09 
46.27±2.56 
20.32±l .60 
Coelopleurum lucfdum 
1 I8.70± 3.39 
2.91 ±0.06 
45.80±l .22 
1 4.58±0.58 
Con i um macu latum 
I33.23±I3.34 
3.28±0.i2 
49.43±3.82 
I8.40±0.96 
CrvDtotaenia canadensis 
I00.58± 7.32 
2.88±0. 19 
46.43±3.89 
I8.29±2. 12 
Daucus carota 
I36.33±I3.99 
3.20±0.09 
51 ,48±3.02 
1 3.99±0.65 
Herac 1 eum max i mum 
22 1 ,30± 15.81 
2.97±0.04 
70.03±l .77 
1 1 .86±0.84 
Heracleum sphondylium 
2I7.62±I4.37 
2. 97 ±0.04 
67.64±l .37 
1 3.91 ±0.49 
Imperatoria ostruthium 
1 42.90± 8.96 
3.48±0.07 
45.1 6± 1 .20 
I8.36±0.57 
Levisticum officinale 
I20.57± 9.27 
3.67±0. 1 3 
39.85± 1 .06 
1 7 . 09± 1 .07 
Fasti naca sativa 
88.42± 9.19 
3.02±0.0I 
52.40±2.68 
1 8 .5 1 ± 1 .31 
Pseudotaenidia montana 
1 52.55± 14.63 
4.62±0.26 
22.4 1 ±2 .65 
14. 05± 1 .34 
Sium suave 
1 I8.37± 4.55 
3. 1 5±0.02 
49. 1 1 ±0.90 
31 ,08±l .14 
Taenidia inteqerrima 
1 42.56± 15.64 
2.84±0.09 
45. 1 3±4. 1 0 
1 6 . 88 ± 1 .51 
Thaspium barb inode 
161. 70± 6.03 
4 .4 1 ±0 . 26 
28 . 1 0±2 . 1 2 
I 4.42± 1 .88 
Zizia aptera 
1 38.73± 4.77 
2.9 l±0.06 
44.20±l .87 
29.1 I ±0.74 
Zizia aurea 
140. 04± 9.55 
2.69±0.07 
34.50± 1 . 33 
1 9.29±0.80 
*The significance values of the 'T' statistic with 30 df are: 0.05 = ±2.042, 0.01 = 
±2.750. 
2 T = 0.079 
3 T = 0.058 
4 T = 2.103 
5 T = 2.615 
