As this work is passing through the press we receive a book by Mr. and Mrs. Peckham on The Instincts and Habits of the Solitary Wasps, Madison, 1898. They are of opinion that, in the case of some species, it does not matter much whether the victim is or is not killed by the stinging.

[47]

P. ent. Soc. Washington, iii. 1896, p. 303.

[48]

Monograph by Lucas, Berlin ent. Zeitschr. xxxix. 1894.

[49]

"Die Gattungen der Sphegiden," Ann. Hofmus. Wien. xi. 1896, pp. 233-596. Seven plates.

[50]

We will take this opportunity of correcting an error in the explanation of Fig. 333 of the preceding volume, showing the propodeum, etc. of Sphex chrysis. f points to a division of the mesonotum, not of the metanotum, as there stated.

[51]