Sphex (Ammophila) nigricans. Dahl. Several nests were seen on October 12, 1930, at Pittsburgh Lake, Ill. (Opposite St. Louis, Mo.). The mothers were excavating nests although it was very late in the season. The burrows in the ground were “L” shaped; the neck, one-half inch in diameter by one-half inch long; the pocket at the bottom, one-inch wide by three-fourths inches deep. I found one caterpillar at the bottom of each of the three nests I opened.