Lp ts 
Prof. W. E. Hoffmann, head of the biology department of Lingnan 
University, Canton, China, came to Washington March 27 and will spend 
some time in the taxonomic unit. 
Ss ela NT A SY CS A I 

INSECT PEST SURVEY AND EXTENSION ENTOMOLOGY 
J. A. Hyslop, in Charge 
George N. Wolcott, of Porto Rice, visited the office of the Insect 
Pest Survey on March 18 to discuss the periodical northward flights 
of the cotton leaf worm (Alabama argillacea Hbn. ) 
Wn. E. Hoffmann, of Lingnan University, Canton, China, visited 
the office of the Insect Pest Survey to look over the distribution re— 
ports of Nezara viridula L. Arrangement was made with Mr. Hoffmann 
whereby he will make a monthly report on insect conditions in China, 
the report to be published in the monthly bulletin of the Insect Pest 
survey. 
C. H. Brannon, Entomological Specialist at the North Carolina 
Agricultural Experiment Station, Raleigh, N. C., visited the Insect 
Pest Survey on March 18 to obtain information on the distribution of 
the harlequin bug (Murgantia histrionica Hahn). 
TROPICAL, SUBTROPICAL, AND ORNAMENTAL PLANT INSECTS 
A. C. Baker, in Charge 
The annual Central California Citrus Institute was held at Lindsay, 
Calif., on March 4. E. A. McGregor spoke on "The control of citrus 
thrips and citricola scale." On March l2 Mr. McGregor spoke on the same 
topic at the quarterly meeting of the Orange Cove Farm Center. 
On March 28 Dr. Henry H. Richardson was appointed Assistant En— 
temolcogist to assist in the investigations of greenhouse insects at 
whe Tropical Greenhcuse in Washington. Dr. Richardson was formerly 
temporary Field Assistant, under Dr. F. A. Fenton, on the cotton boll 
weevil investigations. He was later appointed Junior Entomologist and 
assigned to gipsy-moth work at the Melrose Highlands, Mass., field lab— 
oratory. He resigned from this position in 1928 to take up graduate 
work at the Iowa State College and received his doctor's degree in March 
of this year. 
