120 
lished by J. H. Merrill and A. L. Ford (51), who found it attacking 
Leucotermes lucifugus and grasshoppers’ eggs in Kansas. The nem- 
atodes were found parasitic in the heads, and in no case were they found 
in the abdomen of L. lucifugus, although after the death of the host 
they might feed within or on any part of the body. 
A Protozoan DtskasE 
While investigating reported white-grub injury on the farm of 
Robert Evans, seven miles northwest of Hoopeston, Ill., September 25, 
1912, Mr. W. P. Flint and the writer observed live and dead grubs 
lying on the surface, and upon close examination also found sickly or 
dead grubs just below the surface, their presence being indicated by a 
slight cracking of the surface crust (16). Specimens were sent to Dr. 
R. D. Glasgow, who was at that time employed by Dr. S. A. Forbes to 
investigate white-grub diseases, and he pronounced the affection due 
to a protozoan parasite. The field containing the diseased grubs was a 
60-acre corn field, 15 acres of which had been ruined by grubs of the 
1911 brood of May-beetles. The soil in the field was a rich black loam 
and the field had been in oats the preceding year. A month later 
(October 29) the field was again visited and dead grubs were found quite 
abundant in the soil in the worst-infested parts of the field. Most of 
those on the surface were dry and readily blown about by the wind. 
Many other diseased grubs, and some dead, were found in the soil at a 
depth of % to 1% inches, their presence usually indicated by the crack- 
ing of the soil, as noted above. Grubs which were apparently free from 
the disease occurred 1 to 1%4 feet below the surface, and although it 
was impossible to make an exact estimate it was evident that more than 
50 per cent. of the grub population had been destroyed by the disease. 
It is interesting to note that although skunks had been active in search- 
ing for the grubs in this field, they had apparently not eaten any of the 
diseased grubs, neither those lying on the ground nor those just beneath 
the surface. The following season (September 30, 1913) the writer 
again visited the field and followed the plow in the infested area for a 
distance of 360 rods; but only 7 adult beetles and 11 grubs were found, 
and most of these were along the edge of the infested area where the 
disease was least prevalent in 1912. Patches in the field were dug to 
a depth of 1% and 2 feet with similar results. The evidence showed 
rather plainly that the disease had destroyed most of the grubs. 
A second outbreak of this protozoan disease was found October 
6, 1915, on the farm of Mr. Ira E. Bryan, one mile north of Belvidere, 
Ill. Dead and sickly grubs were on and just beneath the surface as in 
the case at Hoopeston, above mentioned, and Mr. Bryan had noticed 
diseased grubs several weeks before our visit. An approximate estimate 
showed that at least 50, or possibly 75, per cent. of the grubs in this field 
were affected. It had been in sod the previous year and the grubs 
were from the 1914 brood of beetles. Neighboring fields heavily infested 
with grubs showed the same disease to be prevalent. 
