NO. 3533 CHALCID WASPS OF GENUS EURYTOMA — BUGBEE 509 



shorter ninth abdominal segment, a more dorsally arched and plumper 

 abdomen, lighter colored scape of the antenna, and its range. 



75. Eurytoma imminuta Bugbee 



Map 31 

 Eurytoma imminuta Bugbee, 1951, pp. 259-260. — Burks, 1958, p. 81. 



Types: 9 females and 1 male, holotype female, allotype male, 

 paratypes in the U.S. National Museum (USNM 61239). Paratypes 

 in Bugbee collection, Allegheny College, Meadville, Pa. 



Type locality: Pyramid Lake, Nev. 



Distribution: United States: Nevada, Utah, Oregon. 



Host: Diplolepis variabilis (Bassett) variety on Rosa puberulenta. 



Remarks: Although close to E. spongiosa, this species can be sep- 

 arated by its very short dorsal valves (ninth tergum) that average 

 .10 mm. (.07-.12) in length, and the narrow and deep, complete 

 median furrow on the propodeum. 



76. Eurytoma bolteri Riley 



Map 34 



Eurytoma bolteri Riley, 1869, p. 177. — Viereck, 1916, p. 521 [emendation]. — 

 Ashmead, 1887, p. 195.— Bridwell, 1899, pp. 203-211.— Leiby, 1922, pp. 

 81-94.— Barber, 1938, pp. 173-176.— Peck, 1951, p. 575. 



Types: 3 females, no. 2789 in the U.S. National Museum. 



Type locality: One of the female types bears the no. 38E. The 

 following notations under type locality were taken from a card file 

 in the U.S. National Museum. Washington, D.C., galls collected 

 Aug. 1867; emerged May 1, 1868. 



Distribution: United States: Washington, D.C., New York, Vir- 

 ginia, Indiana, South Dakota, Kansas. 



Host : Gnorimoschema gallaesolidaginis (Riley) on Solidago species. 



Remarks: The commonest host for this species is Gnorimoschema 

 gallaesolidaginis on Solidago species. Other host designations are 

 questionable as I have bred many specimens of eurytomids and never 

 recovered this species from any other host. 



E. bolteri is a large species averaging 5.0 mm. in length. The 

 marginal and postmarginal veins are most often equal in length, and 

 the propodeum is wide with a shallow concavity, in the center of which 

 is a narrow, shallow median furrow that narrows ventrally. The 

 lateral surface of the sixth tergum is heavily sculptured to the dorsal 

 surface where sculpturing becomes lighter and may continue over 

 dorsal surface along anterior border, or fade out altogether. 



