16 
BULLETIN 539, U. S. DEPARTMENT OF AGRICULTURE. 
Table IV. — Number of instars, their length, and length of larval life of Elasmopalpus 
lignosellus during the months of June and July, 1914, at Columbia, S. C. 
Number of tube. 
First 
instar. 
Second 
instar. 
Third 
instar. 
Fourth 
instar. 
Fifth 
instar. 
Sixth 
instar. 
Length 
of larval 
life. 
1 
Hours. 
56 
44 
44 
44 
44 
56 
44 
44 
44 
44 
44 
44 
44 
44 
44 
44 
44 
44 
56 
44 
Hours. 
60 
36 
36 
36 
36 
60 
36 
36 
36 
36 
48 
48 
48 
36 
36 
36 
36 
36 
48 
36 
Hours. 
48 
48 
60 
48 
48 
48 
48 
60 
48 
48 
36 
36 
36 
48 
60 
60 
48 
60 
84 
48 
Hours. 
96 
60 
48 
60 
60 
72 
84 
72 
84 
60 
60 
60 
60 
60 
72 
72 
60 
72 
84 
84 
Hours. 
144 
144 
72 
84 
48 
172 
144 
84 
72 
84 
72 
84 
84 
48 
144 
120 
84 
72 
180 
144 
Hours. 
Hours. 
404 
332 
404 
416 
408 
408 
356 
404 
4C4 
404 
404 
428 
428 
356 
356 
332 
416 
404 
452 
356 
144 
141 
172 
4 
6.... 
8 
108 
120 
132 
144 
156 
156 
120 
9 
10 
11 
12 
13 
14 
15 
16. 
17 
114 
120 
18 
19 
20 
Average 
45. S 
40.8 
50.5 
69 
104 
138.3 
393.6 
Table V. — Number of instars, their length, and length of larval life of Elasmopalpus 
lignosellus, during the month of August, 1915, at Columbia, S. C. 
Number of tube. 
First 
instar. 
Second 
instar. 
Third 
instar. 
Fourth 
instar. 
Fifth 
instar. 
Sixth 
instar. 
Length 
of larval 
life. 
15-771. 
15-773. 
15-774. 
15-775. 
15-776. 
15-777. 
15-786. 
15-788. 
15-790. 
15-791. 
15-795. 
15-797. 
15-925. 
15-926. 
15-927. 
15-929. 
15-933. 
Hours. 
Hours. 
60 
59.6 
Hours. 
60 
72 
48 
72 
72 
60 
48 
72 
60 
48 
60 
58.6 
Hours. 
72 
72 
72 
48 
48 
72 
72 
72 
72 
72 
72 
72 
72 
72 
72 
72 
72 
Hours. 
120 
144 
120 
72 
72 
72 
24 
120 
120 
72 
120 
120 
120 
168 
144 
120 
240 
Hours. 
115. S 
96 
120 
120 
168 
144 
Hours. 
381 
405 
357 
429 
453 
453 
453 
405 
3S1 
477 
405 
381 
357 
429 
381 
381 
501 
413.5 
Table VI. — Number of instars, their length, and length of larval life of Elasmopalpm 
lignosellus, during the months of September and October, 1914, at Columbia, S. G. 
Number of 
tube. 
First 
instar. 
Second 
instar. 
Third 
instar. 
Fourth 
instar. 
Fifth 
instar. 
Sixth 
instar. 
Seventh 
instar. 
Length 
of larval 
life. 
1 
Hours. 
209 
153 
165 
165 
117 
129 
Hours. 
72 
84 
108 
84 
156 
120 
Hours. 
108 
72 
204 
252 
108 
144 
Hours. 
156 
96 
132 
96 
84 
72 
Hours. 
120 
192 
- 48 
72 
84 
•96 
Hours. 
108 
Hours. 
144 
Hours. 
927 
SS5 
799 
957 
S3 7 
2 
120 168 
3 
144 
2S8 
288 
216 
4 
6 
Average 
156.3 
104 
14S 
106 
102 
194 
156 
S63. 7 
