Number 121 July 10, 1922 



OCCASIONAL PAPERS OF THE MUSEUM OF 

 ZOOLOGY 



UNIVERSITY OF MICHIGAN 



Ann Arbor, Michigan Published by the University 



SOME ROBBERFLIES IN THE UNIVERSITY OF 



MICHIGAN MUSEUM OF ZOOLOGY, AND THE 



DESCRIPTION OF A NEW SPECIES 



By James S. Hine 



In a collection of Asilidae sent from the University of 

 Michigan Museum of Zoology are a number of species of 

 more than usual interest. I have used my specimens of some 

 of the species also because by a combination of specimens from 

 the two collections it is possible to form a better series of 

 each species from which to draw conclusions. 



Stichopogon argentius Say. — Numerous specimens taken at 

 Sawyer Dunes, Berrien County, Michigan, also one from 

 Seward County, Kansas. The species is known to be partial 

 to sand areas and has a wide distribution, having been taken 

 on the Pacific as well as the Atlantic coast of North America. 

 These records add two more states to its known range. 



Proctacanthus rufits Williston. — This fine, large insect was 

 described by Williston in Volume 12, Transactions of the 

 American Entomological Society, and reported by him as 



