860 
Journal of Agricultural Research 
Vol. XXX, No. 9 
Table VI. — Development of Necrobia rufipes, 1922 a 
[Food: Mature larvae of Piophila casei L.] 
Date egg hatched 
Sept. 
5. 
5. 
5. 
5. 
5. 
5. 
5. 
5. 
5. 
5. 
5. 
12 . 
12 . 
12 . 
12 . 
12 . 
12. 
12. 
12 . 
12 . 
12 . 
12 . 
12 . 
12 . 
12 . 
12 . 
12 . 
12 . 
12 . 
12. 
12. 
12. 
12. 
12. 
12. 
12. 
12. 
12. 
12. 
12. 
20. 
20. 
20. 
20. 
20. 
20. 
21. 
21. 
21. 
21. 
21. 
21. 
23. 
23. 
23. 
23. 
23. 
23. 
23. 
23. 
23. 
23. 
23. 
23. 
23. 
23. 
Days 
T al 
od 
Cocoon 
period 
Hatching 
to emer¬ 
gence 
| 
j Date egg hatched 
Larval 
period 
Cocoon 
period 
Hatching 
to emer¬ 
gence 
/s 
Days 
Days 
Days 
Days 
Days 
28 
13 
41 
Sept. 23_ 
25 
16 
41 
34 
11 
45 
23_ 
28 
15 
43 
35 
10 
45 
i 23_ 
28 
15 
43 
34 
14 
48 
23_ 
28 
17 
45 
34 
15 
49 
i 23_ 
37 
15 
52 
35 
14 
49 
23_ 
42 
16 
58 
35 
14 
49 
29_ 
24 
15 
39 
35 
15 
50 
29_ 
26 
14 
40 
41 
12 
53 
29_ 
42 
15 
57 
56 
16 
72 
Oct, 2_ 
28 
14 
42 
80 
19 
99 
2_ 
28 
15 
43 
30 
14 
44 
2_ 
28 
17 
45 
30 
14 
44 
3_ 
23 
18 
41 
30 
15 
45 
3_ 
41 
26 
67 
30 
16 
46 
3_ 
41 
29 
70 
36 
13 
49 
3_ 
55 
18 
73 
36 
13 
49 ! 
: 4_ 
26 
15 
41 
36 
14 
50 
4_ 
30 
17 
47 
36 
15 
51 
4_ 
30 
18 
48 
37 
14 
51 
4_ 
48 
16 
64 
36 
15 
51 
4_ 
35 
52 
87 
36 
15 
51 
i 6_ 
38 
16 
54 
36 
15 
51 
6_ 
41 
18 
59 
36 
16 
52 
6_ 
46 
16 
62 
36 
16 
52 
6_ 
41 
21 
62 
36 
16 
52 
6_ 
46 
16 
62 
37 
15 
52 1 
6_ 
46 
17 
63 
36 
16 
52 
6_ 
48 
16 
64 
39 
13 
52 
6_ 
46 
18 
64 
36 
17 
53 
6_ 
48 
18 
66 
39 
15 
54 
6_ 
46 
20 
66 
41 
15 
56 
6_ 
48 
19 
67 
43 
14 
57 
6_ 
48 
20 
68 
44 
14 
58 
6_ 
48 
20 
68 
45 
17 
62 
6_ 
48 
21 
69 
48 
16 
64 
6_ 
52 
19 
71 
48 
16 
64 
6_ 
52 
22 
74 
59 
16 
75 
6_ 
52 
29 
81 
59 
18 
77 
7 . 
45 
16 
61 
65 
16 
81 
7 _ 
45 
16 
61 
28 
13 
41 
1 7_ 
45 
16 
61 
28 
13 
41 
7_ 
45 
17 
62 
28 
17 
45 
7 . 
45 
18 
63 
35 
19 
54 
7_ 
47 
16 
63 
40 
14 
54 
7_ 
47 
18 
65 
54 
16 
70 
! 7 . . _ 
47 
18 
65 
25 
11 
36 
7_ 
45 
24 
69 
25 
12 
37 
8_ 
19 
17 
36 
25 
13 
38 
11_ 
19 
15 
34 
25 
14 
39 
11_ 
38 
7 
45 
32 
17 
49 
11_ 
28 
24 
52 
32 
18 
50 
11_ 
49 
20 
69 
17 
13 
30 
11_ 
49 
22 
71 
17 
13 
30 
12_ 
26 
15 
41 
23 
8 
31 
15_ 
22 
14 
36 
19 
13 
32 
15_ 
39 
15 
54 
23 
12 
35 
15_ 
37 
17 
54 
23 
12 
35 
15_ 
39 
19 
58 
19 
16 
35 
15_ 
47 
21 
68 
23 
13 
36 
15 _ _ 
43 
29 
72 
23 
15 
38 
15_ 
54 
19 
73 
23 
15 
38 
17_ 
35 
17 
52 
23 
15 
38 
18_ 
40 
22 
62 
25 
14 
39 
20_ 
47 
22 
69 
23 
16 
39 
- 26_ 
36 
27 
63 
28 
12 
40 
26_ 
43 
20 
63 
a Larvae reared in Petri dishes. Sept. 5 to 26, exposed to laboratory temperatures, average daily mean 
76° F.; Sept. 26 to Nov. 3, in incubator at 80° to 85° F; Nov. 3 to Dec. 8, temperatures not recorded but 
were usually between 70° and 80° F. All cocoons incubated at 80° to 85° F. 
