AHT. 10 GALL-INHABITING CYNIPID WASPS- — WELD 99 



CALLIRHYTIS PULCHRA Bassett 



These flower galls have been collected at Evanston, Winnetka, 

 Fort Sheridan, and Willow Springs, 111., on Q. coccinea^ a previously 

 unrecorded host, and at Wilmette on red oak, Q. maxima. They drop 

 to the ground about the last of May after the aments have shed their 

 pollen and are drying up. Flies issued June 6, 1911, June 10-24, 

 1912, and before June 16, 1913. Galls were seen on Q. veJutina at 

 Falls Church, Va. 



CALLIRHYTIS PUNCTATA (Bassett) 



Galls were collected at Michigan City, Ind. ; Evan.ston, 111. ; Pop- 

 lar Bluff, Mo. ; Texarkana, Ark. ; Mineola and Palestine, Tex. S. A. 

 Rohwer collected galls at Ironton, Mo., in October, 1918, from which 

 flies emerged April 16, 1919, The species transforms in the fall as 

 adults have been cut out of galls in December and once as early as 

 September 6. Brodie collected galls at Toronto. 



CALLIRHYTIS RUGOSA (Ashmead) 



Described from Q. laurifolia., the writer has taken galls of this 

 species on Q. -plieTlos at Gainesville, Ocala, and Tallahassee, Fla. ; on 

 (}. inibricaria at Rosslyn, Va. ; and on red oak, Q. maxima^ at Palos 

 Park and Ravinia, 111.; Plummer Island, Md. ; and Rosslyn, Va. 

 Schradieck collected galls on Q. maxima at East Hampton, N. Y., and 

 Barlow on Q. imbi^caria at Cadet, Mo. A gall from Long Island 

 contained a pupa on June 15, and one from Chicago area contained 

 a pupa on July 2. No adults reared. The gall is much rarer in 

 the North than in the South. 



CALLIRHYTIS RUGULOSA (Beutenmueller) 



Andricn,>< rugulosus Beutenuveller, Canad. Ent., vol. 43, 1911, p. 211. 



Galls of this species have been taken in May at Winnetka, Ravinia, 

 Glencoe, and Fort Sheridan, 111.; Miller, Ind.; Falls Church, Va. ; 

 and Washington, D. C, on Q. coccinea. The greenish young galls 

 secrete honey dew, which attracts ants. Later they often become 

 straw-yellow with rosy longitudinal streaks on the ridges, the sur- 

 face showing scattered stellate hairs and with a slight nipple and 

 crown of reflexed hairs at apex. Galls collected at Miller on May 19, 

 1917, gave flies before May 16, 1918, the larvae transforming to 

 adults in the fall before middle of November. The galls have been 

 seen just starting at Washington as early as April 24. 



CALLIRHYTIS SCITULA (Bassett) 



Galls of this species were collected at Winnetka and Fort Sheri- 

 dan, 111., and at Chesterton, Ind., on Q. coccinea. Adults of both 



