34 REPORT OF NATIONAL MUSEUM, 1910. 
A joint monograph on the mosquitoes, family Culicids, by Dr. 
L. O. Howard, curator, Dr. Harrison G. Dyar, custodian, and Mr. 
Frederick Knab, of the Bureau of Entomology, was completed. Mr. 
J. C. Crawford, assistant curator, continued his studies of the hymen- 
optera. An important publication by Mr. Nathan Banks, custo- 
dian, consisted of directions for collecting and preserving insects, 
issued as a bulletin, which replaces the well known work by Prof. 
C. V. Riley, now become in large part obsolete. 
Insects to the number of over 9,000 were borrowed by specialists 
during the year, the more important loans having been as follows: 
Bees and wasps to Dr. H. T. Fernald, of Amherst, Massachusetts, 
who is working up the genus Bombus and the subfamily Aporine; 
bees of the genus Ceratina to Mr. H. 8S. Smith, and flies of the family 
Sarcophagide to Mr. W. R. Thompson, both of the Gipsy Moth 
Parasite Laboratory, Melrose Highlands, Massachusetts; and hemip- 
tera of the subfamily Triozine to Mr. C. F. Baker, of Pomona College. 
There were also sent to Mr. William Schaus, at London, England, 
for study and comparison, a selection of about 5,000 butterflies 
from the important collection which he has presented to the Museum. 
Among persons not connected with the Museum who spent more 
or less time in the study and examination of the collections of 
insects may be mentioned Mr. Nicolas Kourdumoff, of the Univer- 
sity of Kief, Russia; Dr. T. F. Dreyer, of Cape Town, South Africa; 
Dr. Arthur Neiva, of the Instituto Oswaldo Cruz, Rio de Janeiro, Bra- 
zil; Mr. W. S. Regan, of the Massachusetts Agricultural College; 
Prof. J. B. Smith, of Rutger’s College; Mr. W. R. Thompson and Mr. 
H. 8S. Smith; Dr. Carroll Fox, of the Hygienic Laboratory, Washing- 
ton; Mr. C. R. Ely, of Washington; and Mr. A. B. Gahan, of College 
Park, Maryland. 
Mollusks.—The most noteworthy addition of the year was a collec- 
tion of about 1,000 land shells from the Smithsonian African Expedi- 
tion, obtained chiefly on the slopes of Mount Kenia by Dr. E. A. 
Mearns. Although the number of species is not large, it is thought 
that, coming from a region not previously explored, a good propor- 
tion may be new. The Philippine Bureau of Science transmitted for 
identification a collection of land and fresh water shells, from which a 
series is to be retained by the Museum, and Father Antonio Arnalot, 
of Davao, Mindanao, contributed over 400 mollusks, also from the 
Philippines. Cotypes of 41 species of Australian mollusks were pre- 
sented by Dr. J. C. Verco, of Adelaide, South Australia; and a set of 
Peruvian shells, including the types of three new species, collected by 
the Hon. Hiram Bingham, was obtained through Dr. L. J. Cole, of the 
University of Wisconsin, in return for assistance in the naming of 
material. During a journey in Mexico Mr. C. R. Orcutt, of San Diego, 
California, secured a number of interesting land shells, several not 
