140 ENTOMOLOGICAL SOCIETY 



creatures has not allowed us hitherto to recognize the distribu 

 tion. Mr. Schwarz said that this statement was not surprising 

 and did not vitiate his contention, since with the Hymenoptera 

 there must necessarily be cosmopolitan species, and probably 

 many of them, just as there are with the Coleoptera. Mr. Ash- 

 mead stated that he referred only to parasitic Hymenoptera in his 

 remarks, but called attention to the honey-bee as an example of 

 a widely distributed aculeate, whereupon Mr. Schwarz said that 

 the honey-bee was a domestic animal and thus beyond the pale 

 of geographic limitations. Mr. Howard stated that if Mr. Ash- 

 mead were right in his statement that the parasites will follow 

 their hosts in extending their geographic distribution, it by no 

 means complicates the question, but really simplifies it, since we 

 have only to ascertain the distribution of hosts and duplicate it 

 for parasites. Mr. Ashmead expressed his dissent to this view 

 since the parasitic relation changes under new conditions and the 

 same parasite may affect different hosts in new regions. His 

 contention was simply that the parasitic Hymenoptera appear 

 to be less affected by climatic change than are other insects. 

 The following paper, by Mr. W. J. Fox, was read by title : 



THE SPECIES OF PEPSIS, INHABITING AMERICA NORTH 



OF MEXICO. 



By WILLIAM J. Fox. 



The recent monograph of the hymenopterous genus Pepsis * 

 by Robert Lucas induced the present author to work up the ma 

 terial of that genus in the collection of the American Entomo 

 logical Society, with the result of bringing to light several entirely 

 new species. The synoptical tables are given herein with the 

 thought that Lucas' work is not accessible to all American hy- 

 menopterists, and are practically identical with those of Lucas, 

 except that the new species are interpolated and some minor 

 points added. 



Pepsis margin at a and Sommeri, which have been recorded 

 by several authors as occurring in the United States, are not in 

 cluded in the present paper. It is doubtful in my mind if these 



* Berliner Entomologische Zeitschrift, xxxix, Heft 4, pp. 449, et seq.> 

 (1894) 1895. 



