ART. 10 GALL-INHABITIXG CYNTPID WASPS WELD 101 



CALLIRHYTIS TUMIFICA (Osten Sackcn) 



This large, smooth flesh}^ swelling of base of midrib and petiole 

 of red oak, Quercus maxima, was collected at Evanston, 111., on June 

 28, the adnlts emerging during July. At Apple Orchard Camp in 

 Bedford County, Va., they Avere merging July 1, 1920. The galls 

 have also been observed at Rosslyn, Va., and Washington, D. C. 



CALLIRHYTIS VENTRICOSA (Bassctt) 



Cynips q. ventrlcosus Bassett, Proc. Ent. Soc. Fhila., vol. 3, 1864, p. 681. 

 Cynlps q. conifera Ashmead, Trans. Amer. Ent. Soc, vol. 9, 1881, Proc. p. 

 XXVII. 



Bassett's galls were collected at Waterbury, Conn., on Quercus 

 iUcifolia in June and the insects cut out of the galls in October 

 " else they would probably have remained until spring." The 

 writer has collected galls which agree with Bassett's description 

 and types on several red oaks : On Uiei folia: at Blue Hills, Mass. ; 

 on cocc'inea. at Miller, Ind. ; Evanston, Winnetka, Ravinia, and Fort 

 Sheridan, 111.; on rubra^ at East Falls Church, Va. ; Washington, 

 D. C, Fairfax, S. C, and Dothan, Ala.; on inibricaria at Joliet and 

 New Lenox, 111., and Waterford and Rosslyn, Va. The galls are 

 green, fleshy, densely short-pubescent, with a broad base and taper- 

 ing apex, growing often on scar tissue on the main trunk as well as 

 on the smaller branches. In tlie Chicago area the}^ may be found de- 

 veloping in June, turning brown and dropping off about the middle 

 of Juh\ Thej^ are often eaten into by squirrels or woodpeckers. 

 About Washington galls have been seen just starting in late March, 

 becoming full grown by middle of May and dropping in early 

 June. They seem to be nowhere common. Although easiest found 

 during the developing stage they should not be gathered for rear- 

 ing until they turn brown or begin to drop. From galls on iiiibri- 

 caria gathered from ground in June at Rosslyn living adults were 

 cut out October 9. A ^. rubra gall from Dothan contained a pupa 

 December 6 which transformed by December 12. Date of emer- 

 gence in spring not determined. 



The type galls of conifera Ashmead are smaller and were collected 

 in Florida in April after they had turned brown on Q. phellos and 

 laurifolia.. The fly was cut out of a dried gall. The galls were said 

 to issue from bud axils, but the writer found galls at Jacksonville 

 on fhellos like the types which were not bud galls but burst out 

 through the bark singly or in clusters of two or three in the inter- 

 nodes, and some were already turning broAvn on April 4. The flies 

 never emerged from these galls, but dead ones agreeing with the 

 type were cut out in June of the next year. These galls were also 

 seen on phellos at Carabelle and Lake City, Fla., and at Clarendon, 



