Me Fae 
ing to the genus Pityophthorus are being sent to Dr. Blackman, as he ex- 
pects to undértake an extensive revision of the species of this genus. 
Dr. Aldrich has been recéiving for examination some tynes of Diptera 
of the older authors from tne Vienna Museum in Austria. The “ourth lot of 
_these types has just been received and is being examined. The first two 
lots have been reported on in the Annals of the Entomological Society of 
America. Among the svecimens received in: these various lots are several 
which were collected about 100 years ago, and which formed a part of the 
collection of von Winthem, in Hamburg, where they were studied and described 
by the dipterist Wiedemann. In spite of their age, most of these specimens 
are well preserved. It appears that as’ far as known several of the species, 
including some very striking forms, have never been captured since that 
time, and are even yet represented only by the single original specimen. 
The privilege of borrowing these types is very highly appreciated. 
LIBRARY 
Mabel.Colcord, Librarian 
New Bools 
Chorley, J. K. 
Locusts: life history and methods of suppression. Rhodesia Agr. Jour., 
Ww. o1, no. 3, Pp, 299-306, >Jume,- 1924. 
Dalla Torre, K. W. von. 
Cossidae. Berlin, W. Junk, Dec. 20, 1923. 60 p. (Lepidopterorum 
catalogus, ed. by Embrik Strand, Pt. 29.) 
Feldman, W. M. 
Biomathematics, being the principles of mathematics for students of 
Diological science. london, Griffin, Ltd., 1923. 398 p.,diagrs. 
Pett. ue. r. 
Manual of tree and shrub insects. ..N. Y. The Macmillan Company, 1924. 
382 p., illus. (The rural manuals.) 
Friedrichns, Karl. 
Okologische beobachtungen Uber embiidinen.~ 's Gravenhage, Nijhoff, 1923. 
eeip., illus., 22 pl. (Capita Zoologica, deel 2, aufl: 1.) 
International Institute of Agriculture. The International Institute of 
Agriculture: Its Organization, Activity and Results. Rome, Print. 
Office of the International Institute of Agriculture, 1924. 51 p., illus. 
Iudwig, Avgust. 
Unsere bienen . . . Berlin, Fritz Pfenningstorff [1922]. 3. verbess. 
Outi. 2 v. in 1. (376-448 p.), illus. 
National Research Council. Division of Engineering and Industrial Research. 
Committee on marine piling investigations. Marine structures; their 
deterioration and preservation. ... By William G. Atwood and A. A. 
Johnson... Washington, 1924. 534 p., illus., maps. Bibliography, p. 462- 
522. 
