ART. 12 KEYS TO SAPROMYZIDAE MALLOCH AND McATEE. 23 



>S'. hispina Loew. — This species has been collected a number of 

 times by various collectors on Plummer Island, Maryland, from May 

 30 to August 4 ; and at Beltsville, Maryland, May 25, 1919, McAtee ; 

 Dead Run, Virginia, August 3, 1915, V. A. Roberts; and Chain 

 Bridge, Virginia, August 20, 1922, Malloch. 



S. cilifera Malloch. — Plummer Island, Maryland, May 9, 191-1. 

 R. C. Shannon. 



-S'. citreifrons Malloch.— Beltsville, Maryland, May 21, 1922, Gler. 

 Echo, Maryland, June 18, 1922, Malloch. 



S. compedita Loew. — Very common; has been collected on dates 

 rauging from May 11 to October 9; in copula June 23; comes to 

 light and visits the flowers of Castanea pumila and Ceanothus amerl- 

 canus. V. P. I. 



S. conjimcta Johnson. — District of Columbia, D. W. Coquillet;- 

 Falls Church, Virginia, June 22, N. Banks; Dead Run, Virginia 

 June 6, 1914, R. C. Shannon. 



S. disjuncta Johnson. — Frequently taken during a season with 

 Maj' 25 and September 8 at its extremes; there are no records from 

 the upper Potomac Valley where so many of the other species have 

 been collected. 



S. fraterna Loew. — Dead Run, Virginia, June 22, July 28, 1915, 

 R. C. Shannon; Cabin John, Maryland, July 31; August 8, Glen 

 Echo. Maryland, July 17, August 8, 28, 1921, July 9, 16, August 6, 

 22, 1922, Malloch. 



*>S'. fusoihasis Malloch. — Dead Run, Virginia, June 22, 1916, June 

 29, 1915, R. C. Shannon; Falls Church, Virginia, August 7, N. 

 Banks: Plummer Island, Maryland, June 29, September 13, 1914. 

 McAtee; July 31, 1913, R. C. Shannon. 



S. hovghi Coquillett. — Has been taken a number of times, but 

 does not appear at all common; season June 4 to August 26; in 

 copula June 4, July 14; visits flowers of Ceanothus americanus and 

 Xolisma ligustrina. V. P. I. 



S. imitatrix Malloch. — ^^''ashington. District of Columbia, April 

 17, 1923, E. N. Cory ; Beltsville, Maryland, May 21, 1922, Malloch. 



* S. incerta Malloch. — Common ; dates of collection range from 

 June 8 to October 2 ; comes to light. P. I. 



S. nuhila Melander. — Arlington, Virginia, June 6, 1914, R. H. 

 Hutchinson. 



'S'. nubilifei'a Malloch. — Plummer Island, Maryland, June 8, 1914, 

 at light, R. C. Shannon: August 27, 1913, h! S. Barber: Cabin 

 John Bridge, Maryland. June 14, 1913, R. C. Shannon. 



S. philadelphica Macquart. — Common; June 9 and September 28 

 mark the extremes of the season during which it has been collected ; 

 comos to lifflit. P. I. 



