~7T- 
MISCRIIANSOUS INVESTIGATIONS 
(ttems from the National Masenm contriovted by 5. A. Rohwer) 
Berkeley, Calif., visited the Division of insects for a few hours November 
27. Doctor Essig is especially interested in methods of arranging collec- 
tions, types of cases, and the amount of material vepresented in various 
groups, and also was glad of the opportunity to become acquainted with 
various workers in the Division, 
Dr. BE. 0. Essig, of the California Agricultucal Experiment Station, 
S. W. Frost, of Arendtsville, Pa., spent a week workiug with Doctor 
Buving on leat-mining colecpterous larvae. Mr. Frost has made a specialty 
of the study of leaf-miners, and hopes to have an opportunity to study the 
preserved material and slides in the National Collection. 
C. 0. Hamilton, of the University of Maryiand, who recently completed 
an arranugeuent of the collection of the immature stages of Cicindeia, is 
continuing his work on the immature stages of the larvae of the beetle 
family Carabidae. He is spending one day a week in tne Division. 
The collection of exotic coLeopterous larvae has receutly been rearranged 
and labelled in conformity with the Heyden, Reitter, and Weise catalogues 
of Coleoptera. The bulk of this exutic material comes ftom Europe. The 
collection occupies 1,185 vials, and the rearrangement has taken abcut 
Six months. The work has been done by Mrs. Nellie McGonnell under the 
direction of Doctor Bdving, 
Doctor Béving has recertly received as a loan for comparison with 
North American forms four elaterid larvae from Denmark, and he and Mr. 
Hyslop are continuing their work on the arrangement and classification of 
the elaterid larvae in the coilection, 
LIBRARY 
Mabel Colcord, Librarian 
New Books 
Abderhaiden, Emil. 
Handbuch der biologischen Arbeits Methoden. Berlin & Wien, Urban & 
Schwarzenberg, 1920--1923. lfg. 1-105. 
Burroughs, E. H. 
Bibliography of petroleum and allied substances, 1921. Washington, 
Government Printing Office, 1922. 230 p. (U. S. Dept. Interior. 
Bureau of Mines. Bul. 220.) 
Bicknell, P. F. 
The human side of Fabre. New York and London, The Century Co., 1923. 
340 p. port, 
| 

