Williams' "The Aphididae of Nebraska" 3 



University (now George Washington University) and also be- 

 came editor in chief of the Asa Gray Bulletin in 1899. 



Mr. Williams was remarkably successful as a teacher and dur- 

 ing his connection with the U. S. Department of Agriculture he 

 showed unusual power as an organizer. He was an able botanist 

 and one of the foremost authorities on lichens. His ability was 

 recognized by all who knew him. Dr. F. Lamson-Scribner 

 writes that Mr. Williams was in his employ several years and he 

 " came to admire him very much, not only for his faithfulness 

 and industry in the performance of his duties, but also for his 

 high moral character and personal worth." 



He was an active member of a number of scientific societies. 

 When a student at the University of Nebraska, he was one of 

 the seven who organized the Botanical Seminar of the University, 

 which was probably the fjrst botanical society of the kind in 

 America. 



His published papers on botany include ten papers and bulletins 

 of the Division of Agrostology, U. S. Department of Agricul- 

 ture, six bulletins of the South Dakota Experiment Station, and 

 six papers on lichens. Besides the two entomological papers 

 already mentioned, he was the author of the first part of bulletin 

 No. 35 on " Common Fungous and Insect Foes of Farm and 

 Garden," and No. 48 on "Three Injurious Insects," both bul- 

 letins of the South Dakota Agricultural Experiment Station. 



For a fuller account of Mr. Williams' life the reader is re- 

 ferred to the Asa Gray Bulletin., Vol. VIII, No. 6, December, 

 1900, page 109. Many of the facts in our account are taken from 

 the biographical sketch in the Asa Gray Bulletin. 



II. Critical 



Data in quotations are taken from the slide or slides examined. 

 All of the species listed by j\Ir. Williams are noted here, the 

 number before the species referring to the number of the species 

 as given in his paper. If a synonym, or if the name has since 

 changed, the name given by Williams is placed in parenthesis. 



255 



