JAMES A. G. REHN AND MORGAN HEBARD 315 



II 



A SYNOPSIS OF THE SPECIES OF THE GENUS AMBLY- 

 CORYPHA FOUND IN AMERICA NORTH OF MEXICO 



The present study was prompted by the difficulty encountered 

 by the authors in determining certain individuals of this genus 

 from the eastern and southwestern states. While the desira- 

 bilitj' of such a study has l^een apparent to us for some years, it 

 was only in the past few seasons that we were a])le to take up field 

 work in the regions from which material of this genus was par- 

 ticuLarly desired. Much still remains to be done in more fully 

 mapping out the range of the different forms and corroborative 

 evidence on certain matters of relationship is still desired, but 

 both of these matters require more information than present 

 material and literature will supply. In consequence we do not 

 present this paper as a monographic treatise, but we do feel that 

 the systematic and general distributional problems have been 

 studied with sufficient thoroughness and with the authority of 

 enough material to be conclusive. 



We here record 756 specimens of the genus from the area cov- 

 ered b}^ our studies, these comprising the series in the collections 

 of the Academy of Natural Sciences of Philadelphia, of the junior 

 author, the United States National Museum, the Museum of 

 Comparative Zoology, of Prof. A. P. Morse of Wellesley; Massa- 

 chusetts, the Pennsylvania State Department of Zoology and the 

 Georgia State Collection. Material bearing on certain points 

 has been loaned by Mr. W. T. Davis of New Brighton, New York, 

 and from the collection of the University of Kansas, while a 

 considerable number of individuals which have previously been 

 recorded by us have also been re-examined. The latter are not 

 generally included in the total of specimens given above and 

 under the specific treatments. We wish to tender our thanks to 

 the authorities in charge of the above mentioned collections and 

 the other fellow entomologists, who so generously have assisted 

 our work by placing their very necessary material before us for 

 study. Of the total number of specimens given above, 285 were 



TRANS. AM. ENT. SOC, XL. 



