THEODORE DRU ADDISON COCKERELL 
As this issue of Psyche goes to press, we have received 
notice of the death of Professor T. D. A. Cockerell on 
January 26, 1948. The following sketch of his life is 
presented as a tribute and in recognition of his entomo- 
logical contributions. The accompanying photograph 
was kindly sent by Dr. Norma LeVeque. 
Born in Norwood, England, in 1866, Professor Cockerell 
came to this country at the age of twenty-one and for the 
last forty-four years of his life was on the faculty of the 
University of Colorado. He made many collecting trips, 
even to such remote places as India, Australia, Peru, Si- 
beria, and South Africa. His interests in natural history 
were very broad and his publications, which number over 
three thousand, include contributions to botany, paleon- 
tology, and zoology. Insects, of course, were his main 
interest. His early investigations were on Lepidoptera, 
scale insects and Hymenoptera. If he had a specialty, 
it was the taxonomy of the wild bees. While at the Uni- 
versity of Colorado, he worked extensively on insects in 
the Florissant Shales, which were not far from Boulder. 
He also published many papers on fossil insects in the 
Green River Shales, the ironstone nodules of Illinois, the 
coal beds of Maryland, the Baltic amber, and several 
other deposits. He was a regular contributor to Psyche. 
His first paper in this journal, on Jamaican butterflies, 
appeared in 1893 (vol. 6) ; the last, on African bees, in 
1946. 
Professor Cockerell was an inspiring teacher. His 
wide knowledge and boundless enthusiasm attracted stu- 
dents to the University of Colorado from remote parts 
of the country. That many of these have become out- 
standing zoologists and entomologists is due in large 
measure to the unique abilities of their teacher. 
The Editorial Board. 
