{NJURIOUS INSECTS OF I9Q09 AND IQIO. 8 
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FURTHER WORK UPON THE STALK BORERS. 
Papaipema sp. 
Fig. 88. General view of plots used in experiments with Stalk Borers. 
The eggs mentioned and figured on page 153 of the Twelfth 
Report were laid on or about September 17, 1908. On September 
22nd they had become brownish gray in color. On Sept. 26th they 
were photographed; the photograph being the one that appeared 
in the Twelfth Report. On May 2oth, 1909, these eggs began to 
turn dark, and on May 24th and 25th a considerable number of them 
hatched. Many of the caterpillars made their way to the leaves of 
seedlings of the giant bur-elder which happened to be in the cage, 
and in these leaves they acted as leaf miners, making galleries. 
Drawings of this first work of Papaipema larvae were made, and 
also photographs taken by Mr. Ayer. These galleries were made in 
