NO. 3533 CHALCID WASPS OF GENUS EURYTOMA — BUGBEE 479 



(.12-.22) in length; the postmarginal averages about 53% the length 

 of the margmal; stigmal vein short and stout, averaging .14 mm. 

 (.12-.20). 



Male: Body black. Abdominal petiole long, averaging 1.33 times 

 the length of hindcoxa, or hindcoxa about three-fourths length of 

 petiole; legs most often including all coxae, scape and tegula yellow; 

 less often hindcoxa black and some black infuscation on middle of 

 outer face of hindfemora and occasionally hindtibiae. Pile covering 

 face and on thorax, often with a golden-yellow tinge; less often silvery 

 white. Wing veins brown; marginal vein stout, averaging .30 mm. 

 (.20-.37) and postmarginal averages .16 mm. (.12-.20) in length; 

 stigmal averages .17 mm. (.15-.20). 



Neotypes: Neotype female and male in U.S. National Museum; 

 paratypes in the Bugbee collection, Meadville, Pa. Additional 

 specimens in the series from which the types were picked include 31 

 females and 19 males. 



Type locality: Elsah, Jersey County, 111. (Principia College). J. E. 

 Remington collection (ex pupa, June 6, 1946), 155. 



Host: Reared from pupa June 5 and 6, 1946, in gall of Callirhytis 

 seminator (Harris), L. H. Weld determined, on Quercus alba. The 

 lost type material came from Acrasjns erinacei (Beutenmuller), 

 A. hirta (Osten-Sacken), Amphibolips spongijica (Osten-Sacken) and 

 Diplolepis radicum (Osten-Sacken) . 



Distribution: E. auriceps occurs over most of the eastern half of the 

 United States and Canada probably to the northern limit of white 

 oak distribution. Its hosts are species of cynipids, producing galls, 

 principally on the white oaks Quercus alba and Q. stellata. 



The list of additional host records was taken from specimens in my 

 own collection located at Allegheny College, Meadville, Pa., the 

 collections of the U.S. National Museum, Washington, D.C., and 

 Cornell University, Ithaca, N.Y. A^ndricus flocci, A. ignotus, A. 

 pattoni, A. foliatus, Amphibolips cookii, Acraspis pezomachoides, 

 Callirhytis lanata, Disholcaspis globulus, D. spongiosa, D. mamma, 

 Holcaspis fasciata, and Sphaeroteras melleum. 



Remarks: This is a highly variable species. It has been impossible 

 to find any good morphological characteristics that would distinguish 

 more than one species. All characters seem to intergrade throughout 

 the widespread distributional area. 



Since the original types seem to be lost, the redescription is based 

 on a neotype and a paratype series from a locality in Illinois in prox- 

 imity to the area where Walsh is believed to have collected. 



