482 PROCEEDINGS OF THE NATIONAL MUSEUM vol. iis 



late a whorl; distal end with shorter hairs; terminal unit of two, short, 

 closely fused segments separated from the fifth by a deep annidation 

 and about same length as fifth; hair much shorter and extends anteri- 

 orly or in same plane as terminal segments. Marginal vein of the fore- 

 wing averages .16 mm. (.15-. 20) and postmarginal vein .11 mm. 

 (.10-12) in length. 



Types: 32 females and 9 males. Holotype female, allotype, and 

 paratypes in the U.S. National Museum (USNM 66056) ; paratypes 

 in the Bugbee collection, Meadville, Pa. 



Type locality: Manhattan, Kans. Collected by R. Schwitzgebel, 

 Sept. 1, 1940. Paratypes collected in August and September 1940. 



Distribution: U.S.: Pennsylvania, Oklahoma, and Mississippi. 



Host : Bred from trypetid seed maggots in seeds of Vernonia interior 

 Small (Ironweed). 



Additional host: Tephritis (= Neotephritis) Jlnalis in sunflower (Bre- 

 land, 1939). 



Remarks: This new species is most closely related to Eurytoma 

 obtusiventris Gahan. The relationship is suggested by the presence of 

 the raised tubercle on the outer margin of the forecoxae, the narrow 

 pronotum, the short, stocky female antenna, and the sharp angle 

 formed by the scutellum and propodeum. It can be separated from 

 E. obtusiventris, however, by its smaller size, the evenly punctate 

 propodeum in contrast to the transversely striated propodeum of 

 E. obtusiventris, its more oval and laterally compressed abdomen, and 

 the presence of males with their distinctive antennae. 



Schwitzgebel and Wilbur (1943) list two species of parasites as 

 Eurytoma new species that were bred from trypetid seed maggots 

 (p. 8). The series of 56 females mentioned above, from which this 

 new species was described, was part of their reared material so that it 

 is very likely that its real host is one of the species of trjrpetid listed 

 in their paper. The exact relationships of host and parasite were not 

 determined. 



44. Eurytoma bigeloviae Ashmead 



Map 21 



Eurytoma bigeloviae Ashmead, 1890, pp. 25, 45. — Peck, 1951, p. 575. — Bugbee, 



1956, p. 504. 

 Eurytoma chalcidiformis Girault, 1917a, p. 3. 



Types: U.S. National Museum no. 11865. Original description 

 based on 1 female specimen, which is designated as type. 



Type locality: West Cliff, Colo, (reared by T. D. A. Cockerell). 



Distribution: United States: Colorado, California, Utah. 



Host: Trypeta (=Tephrella) bigeloviae (Cockerell) (Ashmead, 1890). 



Remarks: For notes on the synonymy of E. chalcidiformis Girault 

 with this species, see Bugbee (1956, p. 504). 



