WILLIAMS' "THE APHIDIDAE OF NEBRASKA"; A 

 CRITICAL REVIEW 



BY JOHN JUNE DAVIS 



" The Aphididae of Nebraska " ^ by Thomas Albert WilHams, 

 although written in 1891, was not published until 191 1- and, as 

 might be expected, a number of the species described in manu- 

 script as new in 1891 have, in the twenty years' interval between 

 the date of writing and the date of publication, been described 

 by other authors. 



The object of this paper is, therefore, to note these synonyms 

 and to give additional notes on the species, together with camera 

 lucida drawings made from the type and cotype slides in the 

 University of Nebraska collection. In several cases slides were 

 deposited only in the U. S. National Museum and these. Dr. 

 Howard informs me, are scattered throughout the collection and 

 are at present unobtainable. 



I am indebted to Professors Lawrence Bruner and Myron H. 

 Swenk of the University of Nebraska for the loan of the slides 

 in the Nebraska collection. 



I. Biographical 



Thomas Albert Williams was born November 25, 1865, in Fre- 

 mont county, Iowa, and died December 23, 1900, at his home in 

 Takoma Park, D. C. At the time of his death he was survived by 

 a wife and child, his father, two brothers and a sister. 



In 1867 his family moved from Iowa to Weeping Willow, 

 Nebraska, and it was here that he early began to collect and study 

 the treasures of " God's out-of-doors." He first attended district 



^Nebraska University Studies, 10: 2, April, 1910. 



* Professor Myron H. Swenk writes me that, although the date on the 

 Studies is given as April, 1910, the paper was not published until 191 1. 

 He gives the date of distribution as March 4, 191 1. 



University Studies, Vol. XI, No. 3, July 1911. 



