86 
This root louse has been identified bj Prof. Osborn as an alter¬ 
nate form with a species of the same genus, <S. corni, Fabr., from 
the leaves of the dogwood (U. 8. Department of Agriculture, Di¬ 
vision of Entomology, Bulletin No. 22, p. 40); but from all 
available evidence I am not yet satisfied that the species here de¬ 
scribed as S. pankola ever leaves the ground except to fly from 
the roots of one food plant to those of another. It has been found 
by us m various underground situations from the early part of 
April until the latter part of November, as is shown by the fol¬ 
lowing table, which gives also the plants on which it occurred. 
Date. 
Young. 
Adult wingless 
females. 
Pupae. 
Winged 
females. 
Apr. 5 
In Jog, with ants. 
I 
Apr. 3 ©-25 
In breeding cage; 
on grass roots 
with ants. 
Apr. 12 
Born in breeding 
cage. 
May 16 
Setaria in oat field. 
Setaria in oat field. 
May 17-20 
Born in breeding 
cage. 
May 23 
Corn. 
May 24 
Young grass. 
May 26 
- 
Grass in oat 
field. 
May 28 
Young grass in 
corn field. 
• 
June 1 
Setaria in corn 
field. 
Setaria in corn 
field. 
Setaria in corn 
field. 
Setaria in corn 
field. 
June 10 
Grass in corn field. 
- 
Grass in corn field. 
June 13 
Corn (1883) and 
Setaria. 
Corn (1884). 
June 16 
Setaria. 
June 17 
Corn. 
Corn. 
June 23 
Corn and Panicum. 
Corn. 
Juno 25 
Setaria. 
Setaria, grass. 
Corn, blue-grass 
&c. 
