Packard.] 312 t^'-^y ^' 
COUNCII.LOUS FOK THUKE YEARS, 
*S. L. Abijot. *Edward O, (iIakdiner. 
♦William S. Bryant. *irENRY W. IIaynks. 
*WiLLiAM M. Davis. *Miss Catherine T. Ikelamj. 
*J. Walter Fewkes. *Benjamin Joy Jeffhies. 
councillors for two years, 
George H. Barton. IJobert T. Jackson. 
William Brewster. Nathaniel T. Kidder. 
Miss Cora H. Clarke. Edward S. Morse. 
William T. Sedgwick. 
councillors for one year, 
William A. Jeffries. Alfred P. Rockwell. 
Augustus Lowell. Charles S. Sargent. 
Miss Susannah Minns. Henry F. Sears 
John Ritchie, Jr. Thomas A. Watson. 
COUNCILLORS ex-ojficUs, 
Thomas T. Bouve. George L. Goodale. 
John Cummings. F. W.' Putnam. 
Samuel II. Scudder. 
The following papers were read :- 
ON THE SYSTEMATIC POSITION OF THE SIPIIO- 
NAPTERA, WITH NOTES ON THEIR 
STRUCTURE. 
BY ALPHEUS S. PACKARD. 
This ))apor is based on tlie researches and conclusions of 
Landois, Kraepelin, and Wagner, besides some fragmentary 
drawings and notes of my own. In former j^ears I was quite of 
the opinion of Ilaliday that the tleas were a group of Diptera 
