514 PROCEEDINGS OF THE NATIONAL MUSEUM vol. us 



82. Eurytoma diastrophi Walsh 



Map 37 



Eurytoma diastrophi Walsh, 1870, p. 299.— Mayr, 1878, p. 311.— Ashmead, 1881, 

 p. 30; 1887, pp. 194-198 [Ashmead proposed the name, E. Mayri for E. 

 diastrophi of Mayr 1878].— BridweU, 1899, pp. 203-211.— Viereck 1916 

 p. 521.— Peck, 1951, p. 576. 



Types: Walsh (1870) states that there were 2 males and 19 females 

 on which his description was based. In the U.S. National Museum is 

 a single male, bearing the type no. 1532 and the notation, "through 

 A. Bolter, 1890." This male speciman is probably not one of the 

 original types. In order to have something more definite to go by, 

 I have chosen a neotype female from Bloomington, Ind. The fe- 

 male emerged May 23, 1933, from a gall of Diastrophus nehulosm 

 collected by R. Bugbee on Apr. 12, 1933, on Ruhus species, Kinsey 

 determined. An additional neoparatype series from the same locahty, 

 date of collection, and host includes 49 males and 28 females that 

 emerged from May 23-30, 1933. Neotype female and neoparatypes 

 in the Bugbee collection, Allegheny College, MeadviUe, Pa. and in 

 the U.S. National Museum, Washington, D.C. 



Type locality: Probably from the vicinity of Rock Island, 111. 

 where Walsh conducted much of his collecting. Neotype locahty, 

 Bloomington, Ind. 



Distribution: United States: Connecticut, New Jersey, New York, 

 Vu-ginia, Massachusetts, Washington, D.C, North Carohna, Indiana,' 

 Illinois, Tennessee, Kansas, Colorado, New Mexico, or wherever 

 blackberry occurs. 



Hosts: Distrophus cuscutoeformis (Osten Sacken). Diastrophus 

 nehulosus (Osten Sacken). Diastrophus niger Bassett. Galls of 

 Callachna gihha (Loew) (Peck, 1951). 



Remarks: The host record Callachna gihha (Loew), is very doubtful 

 as this species seems to be restricted to gallmakers on blackberry 

 belonging to the cynipid genus Diastrophus. 



This is a medium-sized species averaging 3.9 mm. in length. The 

 propodeum displays an incomplete, weakly developed median furrow 

 in the upper half to one-quarter, or furrow may be absent entirely. 

 Ninth tergum averages .26 mm. (.17-.32) in length. Female genitalia 

 moderately developed anteriorly, so that stylet arch is in an obhque 

 plane. 



