October 2 and 3 he carefully examined them with reference to the 
condition of the -stalks and the number and quality of the ears, in 
comparison with like facts concerning uninjured hills in the same 
field. Observations were also made on the condition of fields of 
corn on other farms of the neighborhood. The data thus obtained 
have since been summarized and tabulated for comparative study, 
and the materials are thus in hand for a fuller study of Sphenoph- 
orus injury to this crop than has ever before been reported. 
Distribution of Injury. 
The injury to the corn in the Dalbey field was very uneven. In 
one corner almost every stalk on several acres had been damaged, 
while in other parts from 25 to 50 per cent, of the plants had been 
attacked. The distribution of the injury seemed not affected by the 
lay of the land or the moisture in the soil, there being more injury 
on low moist ground at one side of the field and less on similar 
ground at the other side than there was on the higher and drier 
ground. 
The Injurious Species. 
The species of Sphenophorus actually responsible for this mis- 
chief was not definitely ascertained, the beetles having all disap- 
peared from the field; but as the larva of Sphenophorus parvuhis 
was common in the bulbous roots of timothy on adjacent prem- 
ises, and as the old timothy bulbs still present in the injured 
corn field had been similarly hollowed out by bill-bug larvae the year 
before, the probability is strong that this species was largely con- 
cerned in the injury under observation. 
The Injury to Timothy. 
Fields of timothy near by, which had been in that crop for three 
or four years in succession, had at this time from 50 to 75 per cent, 
of the bulbs more or less injured and infested, many of them con- 
taining larvae ranging in size from those evidently but just hatched 
to those large enough to fill the whole timothy bulb. In fields but 
two years in timothy, on the other hand, from 10 to 20 per cent, of 
the bulbs were infested. The injured plants were inclined to throw 
out suckers at the base and also at the first joint above the ground. 
Where the bill-bug larva had eaten out all the substance of the bulb, 
it had often drilled into an adjacent bulb, and was found feeding 
therein. Some larvae were seen just cutting their way out of the 
first bulb, and others in the act of boring into the second, a part of 
