458 PROCEEDINGS OF THE NATIONAL MUSEUM vol. iis 



11. Eurytoma minnesotae Girault 



Map 4 



Eurytoma minnesoia Girault, 1916, p. 338. 

 Eurijtojna minnesotae Peck, 1951, p. 577. 



Types: U.S. National Museum, no. 20322, 5 females and 2 males. 



Type locality: Olmsted, Minn., reared from Quack grass, 1906, 

 Ainslie collection. 



Distribution: United States: Minnesota. 



most: Agropyron (Quackgrass sp.) (Gii\ault, 1916). 



Remarks: Additional specimens of E. minnesotae were not found in 

 any of the collections examined. It seems to be a valid species, how- 

 ever, as the elongate petiole will separate it from any of the other 

 species bred from Quackgrass, such as E. pachy neuron Girault. The 

 small size, absence of a flared carina on the anterior surface of the 

 front coxae, and the rounded narrow propodeum with a narrow and 

 deep, complete, median furrow, will also help to distinguish E. min- 

 nesotae. 



12. Eurytoma illinoisensis Girault 



Map 5 



Eurytoma illinoisensis Girault, 1920, p. 206. — Peck, 1951, p. 576. 



Types: U.S. National Museum, no. 20629, 2 females. 



Type locality: Urbana, 111. Reared in connection with Isosoma = 

 (Harmolita) . 



Distribution: United States: Illinois, South Dakota, New Mexico, 

 Wisconsin, and Iowa. Canada: Quebec, Ontario, Nova Scotia. 



Host: Reared in connection with Isosoma (Girault, 1920). Elymus 

 species (Girault, 1920). Stipa Columbiana, Vicia villosa, V. angusti- 

 jolia, and V. americana (Bugbee collection). 



Remarks: The material included under E. illinoisensis Girault is 

 a mixture of what may be more than one species. Unfortunately, 

 good representative series from more than one locality were not 

 encountered in this study. One or two specimens, often without 

 host data, from a few scattered localities, are not enough to give an 

 adequate picture of the variation of a species. 



The rectangular-shaped abdomen with the narrow sixth abdominal 

 tergum that is about equal in length to the fifth, the rounded pro- 

 podeum with a deep and narrow concavity, and the obviously clavate, 

 elongate antennae are characteristics of this species. 



13. Eurytoma sphaera, new species 



Figure 17; Map 6 



Female: Black. Average length 2.9 mm. (2.6-3.2). Abdomen 

 plump, globular, or approximately round in outline from a lateral 



