No.417.] REVIEWS OF RECENT LITERATURE. 783 
The chapter on relationship is from its nature more open to criti- 
cism ; it is, however, clear in statement and well balanced in pro- 
portion. The practical directions are adequate, though exception 
must be taken to the recommendation for mounting moths and 
butterflies in glass-covered tablets; a sealed mount for any object 
preserved for study — and specimens not for study should not be 
collected — is undesirable. 
A sbort list of books for reference, a glossary, and an index are 
also given. s 
Throughout the book errors of statement — such as, ‘the tus- 
socks are very often included, by competent authorities it is to be 
presumed, in the Noctuidz,’ and that there is but one brood of the 
white-marked tussock each year — are infrequent. 
The illustrations are more numerous than either the title or the 
list indicates, and they show to what good advantage the camera 
may be applied in nature study. S.H 
Sesiidz. — Mr. William Beutenmiiller’s long-expected monograph 
of the Sesiidz of America north of Mexico appears in sumptuous 
form as Part VI of Vol. I of the Memoirs of the American Museum 
of Natural History. After a brief introduction there are sections on 
the position of the family, its characters, characters of the genera, 
Synopsis of genera, historic review of generic names, habits of imago, 
mimicry of imago, characters of the larva, synopsis of larva, habits 
of larve, synopsis of food habits of larva, characters of pups. 
descriptions of genera and species with synopses of the species, 
and a bibliography. 
Mr. Beutenmüller recognizes seventeen genera, 100 species, and 
ten varieties ; one new species and one new variety are described. 
Of the eight plates, five are devoted to the imagoes and three to 
larval borings. The figures of the imagoes, though inconveniently 
arranged on the plates, are admirable ; only five species and three 
varieties are unfigured. Text-figures. showing structural details are 
also given. 
A bibliography of more than thirty-five pages and with 542 titles 
Would seem adequate, but is not sufficient to include all the works 
quoted in the body of the paper. siis 
The date, March, 19o1, on the cover is entirely unjustifiable ; 
Copies were not received until June, and were certainly not 1s$ 
earlier than the end of May. S. H. 
