8Q PKOCEEDIIMGS OF THE NATIONAL MUSEUM voi.6S 



ANDRICUS PETIOLICOLA (Bassett) 



Galls of this species were noticed at several localities and on sev- 

 eral hosts. On the rock chestnut oak, Q. montana, at Watkins Glen, 

 Ithaca (adults beginning to emerge July 10, 1913), and Storm King 

 (Leonard), N. Y. ; North East (contained pupae July 12, 1914), Pa.; 

 Blue Hills, Mass.; Washington, D. C. ; Alexandria and Bedford 

 County, Va. Middleton reared adults at Falls Church, Va., on 

 June 28. On Q. macrocarpa at Evanston, Willow Springs, and 

 Clinton, 111. ; and Medina, N. Y., where they contained pupae June 

 80, 1914. ;Middleton reared flies at Falls Church, Va., June 27. On 

 Q. hicolor at Evanston, 111., where adults began to emerge June 23, 

 1906. On Q. alba at Willow Springs, 111. ; Poplar Bluff, Mo. ; Alex- 

 andria and Bedford County, Va. ; Forest Hills, Mass. ; Ithaca, Farm- 

 ingdale (Crosby), and East Hampton (Schradieck), N. Y. At To- 

 ronto Brodie found adults of both sexes emerging July 5-13. 1888. 

 At East Falls Church, Va., flies emerged July 5, 1924. On Q. stel- 

 J.ata at Hugo and Tuskahoma, Okla. ; Arlington, Tex.; Troy and 

 Dothan, Ala.; Marianna, Kiver Junction, Carrabelle, Madison, 

 Ocala, St. Petersburg, Daytona, and Green Cove Springs, Fla. At 

 Rosslyn, Va., galls were full grown by June 1 and adults issued 

 June 21-27, 1923. In 1924 adults emerged July 5 and were observed 

 ovipositing in terminal buds. 



ANDRICUS PISIFORMIS Beutenmueller 



The writer has collected these vernal galls on Q. alha at Ravinia, 

 Fort Sheridan and Willow Springs, 111., and at Miller. Ind., in 

 May; at Falls Church and Richmond, Va., and Jacksonville, Fla., 

 in April. In the Chicago area a gall opened November 2G the same 

 fall contained a pupa and at Falls Church adults were found as 

 early as October 26, indicating that the larvae transform in the 

 fall, the adults remaining inside the galls to emerge in the spring. 

 They emerged from Jacksonville galls on February 27. Galls were 

 noted on Q. hicolor at Evanston, 111., just starting to develop on 

 May 2, 1916. The twigs were cut off and put in a jar of water in 

 laboratory where the galls became full grown and dropped off by 

 May 28. On Q. stellata in Florida the galls were full grown on 

 April 15. Many were badly deformed by guest flies, especially in 

 basal half. They were also noted on this oak at Tuskahoma. Okla.; 

 Rosslyn. Va. ; and Washington, D. C. 



This gall may be found in the spring just as the new leaves are 

 unfolding. They develop from the weaker lateral buds usually on 

 previous season's growth. When mature they drop to the ground 

 showing a deep brown scar at point of attachment. The outer white 



