Art. 23 GENUS CYLINDROMYIA MEIGEN ALDRICH 9 



nearly as long as the anterior forceps; the latter are shininc; black, 

 moderately slender, gently curved to a rounded apex. The sides of 

 the last genital segment project in a thin yellow process along the 

 side of the cavity containing the genital organs. 



In the female the last abdominal segment is in the form of a deep 

 spoon with a deep median notch in its apex, from which the sting 

 usually projects; there are no hooklike processes on the segment. 



The type of dosiades from Nova Scotia is in the British INIuseum. 

 The species is quite recognizable from the description, and I am 

 assured by Maj. E. E. Austen that we have it correctly identified 

 (as dosiades, he is not responsible for the s3monymy). Sixty-eight 

 specimens before me of both sexes show the following distribution : 



In National Museum. — Vicinity of Washington, District of Colum- 

 bia, including adjacent Maryland and Virginia, 14 specimens col- 

 lected b}'' McAtee, Walton, Knab, Roliwer, Barber, Greene, Myers, 

 Jackson, and Aldrich; others from Bar Harbor, Maine (C. W. John- 

 son) ; White Mountains, New Hampshire (Morrison) ; base of Mount 

 Washington, New Hampshire (Townsend) ; Wilmington Notch, 

 Adirondacks, New York (Aldrich) ; Oswego, New York; Harrisburg, 

 Pennsylvania (Walton) ; La Fayette, Indiana (Aldrich) ; South 

 Georgia (Morrison) ; Minot, North Dakota, and Moscow, Idaho 

 (Aldrich) ; Lindsa}^, California (McGregor) ; Rampart, Alaska, 

 *' through B. Preston Clark." The last locality is almost at the 

 Arctic Circle, on the Yukon. 



In the Canadian National Collection. — Oliver, British Columbia 

 (Garrett) ; Agassiz, British Columbia (Glendenning) ; Banff, 

 Alberta (Garrett) ; Aylmer, Quebec (Miss G. Beaulieu) ; Ottawa, 

 Ontario. 



In Professor Melander's collection (all collected by him except as 

 noted): Woods Hole, Massachusetts; Lyndon, Vermont; Chicago, 

 Illinois; Moscow and Chatcolet, Idaho; Perma, Montana; Pullman, 

 Seattle, and Lake Cushman, Washington; Stanford University, 

 California (Mann); Pullman, Washington (Mann). 



In Professor Hine's collection. — Pelee Island, Ontario (Gaige) ; 

 Kaslo, British Columbia (Osburn) ; Winona Lake, Indiana. 



In H. J. Reinhard's collection. — Ohio (Reinhard). 



Two specimens in Professor Melander's collection (Waubamic, 

 Ontario and Almota, Washington) have no discals on the second and 

 third segments; one specimen from Laggan, Alberta (Osburn, in 

 Hine's collection), and one from Colorado, have the regular pair of 

 small decussate apical scutellars occurring on other species of this 

 genus; and one specimen from Bottineau, North Dakota (Ainslie), 

 has the head unusually long on its lower edge. With the available 

 material I do not consider these aberrations specific. 

 79G48— 26 2 



