460 PROCEEDINGS OF THE NATIONAL MUSEUM vol. iis 



northward through the Mississippi River Valley and then spreading 

 eastward and westward by way of its main tributaries, such as the 

 Tennessee, Ohio, and Missouri. This suggests that the species may 

 be found also even farther north, wherever its hosts occur. 



Remarks : E. sphaera and E. ohtusiloha Ashmead are closely related 

 but E. sjihaera has a longer petiole, averaging about half the length 

 of the hindcoxae, in contrast to E. ohtusiloha where the petiole averages 

 nearer one-fourth the length of the hindcoxae. In addition, the 

 marginal vein is broader, and also longer in relation to the post- 

 marginal; the stigmal club is larger than in E. ohtusiloha. E. sphaera 

 also has a wider and not as deep a median furrow on the propodeum. 

 E. sphaera has been bred from cynipid galls belonging to the genus 

 Disholcaspis on oak only, while E. ohtusiloha is restricted to the genus 

 Diplolepis on rose. 



14. Eiirytonia obtusilobae Ashmead 



Map 6 



Eurytoma obtusilobae Ashmead, 1885, p. 13; 1888b, pp. 1-8 [lapsus calami]. — 

 Bugbee, 1951, pp. 251-253 [redescription]. — Peck, 1951, p. 577. — Burks, 

 1958, p. 81. 



Types: U.S. National Museum, no. 25504; type series consists of 

 3 females and 1 male of which I have labelled 1 female specimen as 

 lectotype. 



Type locality: Jacksonville, Fla. 



Distribution: United States: Probably all of North America 

 (Bugbee, 1951). 



Hosts : Undetermined cynipid gall on Quercus ohtusiloha (Ashmead, 

 1885). Diplolepis radicum (Osten Sacken) on Rosa palustris and R. 

 Carolina (Bugbee, 1951). 



Remarks: This species is closely related to E. sphaera. For 

 distinguishing characteristics, see remarks under the latter species. 



Group B. Brevipetiolata 

 Complex I. Bicolor 



15. Eurytoma semivenae Bugbee 



Map 7 

 Eurytoma semivenae Bugbee, 1957, pp. 47-48. — Moser, 1965, pp. 1-95. 



Types: 5 females and 8 males; holotype female, allotype male and 

 3 paratypes in the U.S. National Museum (USNM 66035) ; paratypes 

 in University of Texas and Cornell University. 



Type locality : Palo Duro Canyon, Tex. 



Distribution: United States: Texas, Kansas, Ohio, New York, 

 Arkansas. 



