A. REVISION OF THE INSECTS OF THE APHID GENUS 



AMPHOROPHORA 



By Preston W. Mason 



0/ the Bureau of Entomology, United States Department of Agriculture 



This paper represents principally a systematic study of the aphid 

 genus AmphoropTiora Buckton. There has also been included what 

 is known of the biology of each species. The meager facts that are 

 available indicate very forceably the need of rearing work in connec- 

 tion with any systematic study in this family of insects. 



The genus was erected by Buckton in British Aphides ^ for a new 

 species which he described on the same page. Since that time various 

 other species have been added by other writers. Several authors 

 have discussed the species common to their own State or country, 

 but the species of this genus of the entire world have never been 

 brought together in one paper. The present writer has attempted 

 to do this here. 



In this work I have had the use of all specimens in the United 

 States National Museum and the Bureau of Entomology; the collec- 

 tion of the Maine Agricultural Experiment Station, loaned by Dr. 

 Edith M. Patch; the Swain collection of Leland Stanford University, 

 loaned by Prof. G. F. Ferris; a part of tlie Canadian collection loaned 

 by William Ross; and the private collections of W. M. Davidson, 

 Dr. Thomas Guyton, and Harold Morrison. Prof. J. J. Davis has 

 kindly loaned certain slides from his collection and from the Monell 

 collection. Prof. E. O. Essig has loaned specimens from the Uni- 

 versity of California. Prof. R. Takahashi sent Japanese material. 

 The National collection contains metatype slides of certain of Van der 

 Goot's species. Frederick Laing and Prof. F. V. Theobald have dis- 

 cussed through correspondence the European species and Professor 

 Takahashi the Japanese and Formosan species. Prof. O. W. Oest- 

 lund has compared drawings sent to him with species discussed by 

 him in his report of 1887. 



Certain aphid workers who have visited Washington recently have 

 examined some of the slides with the writer and expressed their 

 opinions as to the identity of the species. These include Miss Patch 

 and Messrs. Ross, Guyton, Davidson, and Potgieter. 



1 Vol. 1, 1876, p. 187. 



No. 2592.— Proceedings U. S. National Museum, Vol. 67, Art. 20« 



•t.3328— 25 1 1 



