616 
JOURNAL OF ECONOMIC ENTOMOLOGY 
[Vol. 17 
trical effects in insecticide dusts. V. E. Whitman, of the Bureau of Standards, has 
been assigned to the problem. The field work will be carried on at Tallulah, la. 
Mr. John R. Greeley was employed temporarily at the U. S. National Museum, 
for the last fifteen days in June assisting Mr. McAtee in arranging part of the Hemip- 
tera collection. During the remaining portion of the summer season Mr. Greeley 
will work under the Biological Survey, and in the fall will return to Cornell to carry 
on his university studies. 
Mr. James Zetek and family of Panama, visited the U. S. National Museum re¬ 
cently. Mr. Zetek has collected a great deal of fine material which has been sent to 
the Museum for identification and addition to the collection, and has spent consider¬ 
able time collecting nests, termites, and wasps, and also a series of some of the rare 
Panamanian ants. 
Mr. J. R. Horton, Entomologist in Charge of the Wichita, Kansas, laboratory, 
and A. F. Satterthwait, Entomologist in Charge of the Webster Groves, Mo., labor¬ 
atory, attended the meeting of entomologists and agriculturists who met at Kansas 
City, Mo., in May to discuss and put into operation methods of control for chinch 
bugs and the Hessian fly in Kansas, Missouri, Nebraska and Oklahoma. 
Dr. W. M. Mann of the Bureau of Entomology sailed for Europe on July 19, to be 
gone for several months. He will go to Spain in connection with some work for the 
Federal Horticultural Board. He also intends to visit Dr. Wasmann, the eminent 
Dutch entomologist, at St. Ignatius Kollege, Valkenburg, Holland, for the purpose 
of studying his collection of ants and beetles. 
Dr. F. C. Craighead, of the Bureau of Entomology, left Washington on June 19 
for an extensive trip to inspect the work at the various Forest Insect field stations, 
and also the co-operative work being conducted at the Forest Service exoeriment 
stations; both the Kaibab Project in Utah and the Southern Oregon-Northern Cali¬ 
fornia Project, the largest bark-beetle control projects ever instituted by the Govern¬ 
ment, will be inspected. 
Mr. C. H. Popenoe, Bureau of Entomology, in charge of the truck-crop insect work 
at the Silver Springs, Aid., laboratory, visited Pomeroy, Pa., and vicinity to investi¬ 
gate an outbreak of insects in mushroom houses. It was first reported that mites 
were the cause of the trouble, but upon investigation Mr. Popenoe found that spring- 
tails were the piincipal insects concerned. Co-operative experiments with the mush¬ 
room growers have been initiated. 
Messrs. Kenneth Auden and A. R. Graham were reappointed as Insect Pest Inves¬ 
tigators for the Entomological Branch, Canadian Department of Agriculture, and 
reported for duty, the former at Vernon, B. C., May 15, and the latter at Aylmer, 
Quebec, June 1. Mr. R. S. Hawkins, temporarily appointed as Insect Pest Investi¬ 
gator, reported for duty at Fredericton, N. B., on May 28. Miss D. F. Forward 
appointed temporary laboratory assistant, began her work on June 24. 
Since Dr. McDunnough took up the study of the Ephemeridae several years ago, 
he has described 59 species, the types of which are deposited in the Canadian National 
Collection. This collection now contains representatives of over one hundred and 
fifty North American species (about two-thirds of the known species from this region) 
and is without doubt one of the most complete collections of North American May 
flies in existence. 
