64 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 79 



slightly smaller in diameter than funicle, length equal to Fl plus F2, 

 with a fairly blunt end. 



Type locality. — Probably Rock Island, 111. 



Cotypes. — A female and two males, U.S.N.M. No. 1535. 



Remarks. — Redescribed chiefly from the two male cotypes and a 

 series of both sexes reared from the same source as the original speci- 

 mens. The description was checked with the female cotype. Color 

 extremes as found from Virginia are also included in the description. 

 This species has been difficult to identify with certainty by means of 

 the description by Walsh, which does not agree in some color features 

 with the type material and other specimens reared later by others. 

 Notably, the scape is always yellow instead of brown black, as de- 

 scribed by Walsh. It is recognizable, however, from the original 

 account by the size, its usually mostly black color, the extremely 

 variable extent of the submarginal band, and the host. The male 

 paratypes have the legs chiefly yellow, whereas the other specimens 

 check with the original description in having the legs chiefly black. 

 It has been thought that many of Walsh's specimens were destroyed 

 in the Chicago fire. Doctor Walsh originally possessed 3 males and 

 2 females reared September 22 to 24, and 40 males and 16 females 

 reared May 8 to 20 from the oak-fig gall, Biorhiza {Xam,thoteras) 

 forticomid (Walsh) {-ficus Fitch). The only other series in my 

 possession that is positively known to have been reared from this gall 

 was received from Doctor Kinsey, who reared them at Forest Hill, 

 Boston, Mass. The host insects issued between April 8 and July 9, 

 1918. This series consists of 21 males and 8 females, B. foi^ticornis 

 is known to make its galls on white oak {Quercus alba), dwarf chin- 

 quapin oak {Q. prinoides), and chestnut oak {Q. pHnus), and may 

 occur on other species of Leucohalanus. Additional specimens are at 

 hand as follows: 16 females and 13 males bearing the record num- 

 bers 2F41«\ 2F41°-, and 2F41°^ with dates ranging from August 6, 

 1882, to August 5, 1884. The records show that these were the rear- 

 ing dates of specimens collected several weeks earlier in galls from 

 Q. alba in Virginia. Some of the data were lost in the meantime, 

 and the cynipid host of this lot is not known ; 1 male is labeled New 

 Brunswick, N. J. ; 10 females and 4 males with no data are mounted 

 on a single card; 2 females and 5 males originated at the Michigan 

 Agricultural College with the accession catalogue numbers and data 

 as follows : 857, March 24, 1888, from the gall of Disholcaspis {Uol- 

 caspis) mamma (Walsh) ; 600B, March 23, 1887, from mossycup oak 

 {Q. macrocarpa), "corky gall," D. mamma; 601, April 25, 1887, 

 reared from white-oak bladder gall, without scientific name; 601A, 

 April 28, 1887, reared from same as 601 ; and 738, June 27, 1887, from 

 " red-oak lesser globular leaf gall." The rearings were probably by 



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