AET. 2 A EEVISIOlSr OF THE GENUS PROCECIDOCHAKES ALDRICH 13 



Length, male, 4 mm.; female with ovipositor, about 5 mm. 



Redescribed from four males and two females reared in April, 

 1889, at Lafayette, Ind., by F. M, Webster, from galls on Ambrosia 

 artemisiaefolia; two males and two females reared at Earkwood, Mo., 

 April, 1887, "from aggregated gall on Ambrosia" by Miss Mary E. 

 Murtfeldt; 14 specimens of both sexes reared at Sioux City, Iowa, 

 April, 1922, from " polythalamous gall on weed"; three males from 

 Tallulah, La., bred in April, 1910, from a gall (Hunter No. 1944); 

 two males from Lafayette, Ind., July 17, 1915, and August 1, 1917 

 (J. M. Aldrich). The larval habit of this species has not been 

 hitherto reported, although some of this material was reared more 

 than 40 years ago. 



Nathan Banks informed me that he found two other specimens in 

 the Johnson collection; one is from Wellington, Kans., the other from 

 Philadelphia, Pa. Both were labeled polita. 



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