34 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 121 



Genus Stratiomys Geoffrey, 1762 



This is one of the largest genera of soldier flies that occurs in 

 North America. Of the 21 species listed by James (pers. comm.), I 

 have seen associated larvae or puparia of 7 species. 



Generic characters.— As given m key to species 



Key to Species of Stratiomys Geoffrey 



(Although associated puparia of 7 species were available, I was able to separate 

 only 1 species {S. discaloides Curran) from the remaining 6). 

 Length of last abdominal segment approximately 2 times the basal width of 



that segment discaloides Curran 



Length of last abdominal segment greater than 2 times the basal width of 



that segment adelpha Steyskal, badia Walker, 



barbata Loew, meigenii Wiedemann, norma Wiedemann, normula Loew. 



Stratiomys discaloides Curran, 1922 



Figure 119 



Description.— Puparium: length 31 mm, width 6.8 mm; head and 

 body segments dark brown; faint dark markings at basal margin of 

 body segments. Other characters as given in key to species. 



Biology.— No data are available for this species. 



Material examined.— Montana: Harlan Gulch, Rav. County, 

 Jan. 9, 1932, C. B. Philip, 1 broken puparium, WSU. 



Stratiomys species 



Figures 20, 105-109 



Description.— Puparimn: length 31.3-41.0 mm; width 4.9-6.0 mm; 

 color varymg from grey brown to dark brown; markmgs same as for 

 S. discaloides. Other characters as given in key to species. 



Biology.— See biology section in this paper. 



Material examined. —S'fraiiomys adelpha Steyskal: New York: 

 Ithaca, Decker Pond, Mar. 27, 1950, H. H. Schwardt, 1 puparium, 

 WSU. Saskatchewan: Watson, May 15, 1956, M. E. Taylor, 5 

 puparia, MWM. Stratiomys badia Walker: Alberta: 4 miles north 

 of Devon, May 16, 1961, G. Pritchard, 1 puparium, MWM; Banff 

 National Park, Mt. Ishbel, June 14, 1960, Ball, Madge and McFadden, 

 1 larva, 1 puparium from imder moss, elevation approximately 6000 

 ft., MWM. Stratiomys barbata Loew: Manitoba: Churchill, July 16, 

 1949, 2 puparia, CNC. Alberta: Banff National Park, Mt. Ishbel, 

 June 14, 1960, Ball, Madge and McFadden, 1 puparium, elevation 

 approximately 6000 ft., MWM. Stratiomys meigenii Wiedemann: 

 Kansas: Manhatten, Feb. 8, 1936, H. H. Schwardt, 2 puparia, WSU. 

 Stratiomys norma Wiedemann: Wisconsin: T9N Knapps Creek, 

 Richland Comity, R2W, June 10, 1954, R. H. Jones, 4 puparia, WSU. 



