jLRT. 10 GALL-INHABITING CYNIPID WASPS WELD 123 



ANTISTROPHUS SILPHII Gillette 



On June 23, 1915 the writer collected old galls of what he deter- 

 mines as this species on roadside plants of S'dphiuni 'perfoliatuiii 

 at Valley, Nebr. In 1917 galls from this locality were collected early 

 in May and sent to Evanston, 111., where adults emerged May 26, 31, 

 and June 12. The National Museum has two galls from Omaha. 

 The species was previously recorded only from Illinois. Beuten- 

 mueller erroneously used the name leavenworthi Bassett for this 

 species instead of the older name siJphii Gillette. 



GONASPIS POTENTILLAE (Bassett) 



Galls were seen on Potentilla at New York City (San ford and 

 Griffith); Bluemont, Va; Miller Ind. ; and Glen Ell^^n, Ravinia, 

 and Kenilworth, 111. In the Chicago area flies issued May 28, 1907: 

 galls contained pupae on May 2 and adults began to emerge May 22, 

 1909; adults began to emerge before May 20 in 1912 and emerged 

 May 15-18, 1913. P. R. Myers reared adults at Harrisburg, Pa., 

 on May 17. 1908. 



RHODITES BICOLOR (Harris) 



This spiny rose gall has been taken at the following localities : 

 Evanston, Glencoe, Ravinia, Fort Sheridan, and Waukegan, III : 

 Miller and Michigan City, Ind. ; Medina, Ithaca and East Hampton 

 (Schradieck), N. Y.; Alexandria, Va.; Landgraff (G. C. Ray), 

 W. Va. In the Chicago area the new galls are full grown but still 

 succulent the last of June, turning brown in July, after which they 

 may be gathered for rearing. Galls kept in cage in greenhouse gave 

 adults the next spring April 30, May 17, May 30. All emerge the 

 first season. Brodie collected galls at Toronto and had galls sent 

 to him from Calgary, Alberta. 



RHODITES DICHLOCERUS (Harris) 



The spiny form of this gall was common at Winnetka, Ravinia, 

 ami Waukegan, 111., and was taken also at North East, Pa. Galls in 

 Chicago area collected in early spring gave adults of both sexes May 

 27, June 7, 11, 21, 1909. In 1911 they emerged May 22 and 24. On 

 May 24 some of the females were liberated on small wild rosebushes 

 recently transplanted to greenhouse and having fresh shoots 5-G 

 inches high. On May 25 a female was seen ovipositing near the tip 

 of one of these shoots. On June 5 a belt of grandular hairs at thi.s 

 point was the first evidence of gall formation and by June 18 the 

 developing gall was 5 mm. in diameter. Adults issued from it in 

 greenhouse the next spring before March 15. Brodie collected the 

 gall at Toronto. 



