
MONTHLY LETTER OF THE BUREAU OF ENTOMOLOGY 
UNITED STATES DEPARTMENT OF AGRICULTURE 
Number 144 » April, 1926 


VISITS FROM FOREIGN ENTOMOLOGISTS 
Niils A. Vappula, of the Agricultural Institute of Finland, has 
been visiting the Bureau of Entomology for a few weeks. He has been 
sent to America by his government to investigate our methods in economic 
entomology, and expects to take a long trip, visiting some of the Bureau 
stations and some of the other entomological centers. Field men will be 
on the lookout for Mr. Vappula. 
Dr. R. J. Tillyard, Chief of the Entomological Department of the 
Cawthron Institute of Nelson, New Zealand, and Mrs. Tillyard were in Wash- 
ington for a few days in the early part of April. Doctor Tillyard landed 
at Vancouver in March, and visited several points of entomological in- 
terest on his way east. He sailed from Boston for England May 1. Doctor 
Tillyard spoke before the Entomological Society of washington, at a spe- 
Cial meeting held in his honor, on the subject of fossil insects; and at 
a luncheon given to him by some of the men in the Bureau he talked at 
some length on the Sppeicage of the problems of New Zealand in economic 
entomology. : 
lL. F. Hitchcock, Biologist of the Commonwealth Prickly—Pear Board 
of Australia, and lirs. Hitchcock visited the Bureau of Entomology early in 
April. Wr. Hitchcock is to take up the work in the United States and Mex- 
ico in relation to the insect enemies of the prickly-pear. He reports 
that a number of the introductions into Australia made by his predecessors 
in this country have been successful and that they hope that the Opuntia 
problem will be solved in this way. 
D. Morland, Apiarist of the Rothamsted Experimental Station, ar- 
rived in Washington on the 30th of April. He will spend some time at the 
Bee Culture Laboratory, studying our methods, and will later go to Ithaca 
for further study, under Doctor Phillips; still later he will visit western 
points of interest to advanced beekeepers. 

