14 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 79 



author's collection. This is a common species and has at times been 

 mistaken for D. nuhilistigma Walsh and D. varians Walsh. 



Remarks. — All types reared indoors from May 5 to 10 by the 

 author at IJrbana, 111., from stem galls on blueberry {Vacciniwm sp.) 

 collected April, 1927, by Dr. E. D. Glasgow in Dune Park, Ind. 

 The species is also known as follows : 25 females and 16 males issued 

 April 5 to 10 from stem galls on dryland blueberry (F. vacillans) 

 collected March 19, 1922, by J. C. Bridwell in Rock Creek Park, 

 Washington, D. C; 8 females, labeled 4460, issued May 1, 1883, 

 and the rearing records add that they were obtained from V. nitidum, 

 and received at the United States National Museum from J. G. 

 Barlow, Cadet, Mo., April 13, 1883 ; 6 females and 2 males on mul- 

 tiple points labeled only " on Vaccinium (Bilberry), gall box 187 "; 

 2 females on multiple points with data "Pol (polythalamous) gall 

 on Vaccinium 'pennsylvanicum " ; a series of 10 females and 6 males 

 on three multiple-point mounts with record number 199^°, from 

 large galls collected by Mrs. Treat at the bases of small oaks in 

 New Jersey; 5 females and 5 males bearing " No. 2,'' and three pins 

 with data " ex galls on blueberry, Whites Bog, N. J,, from B, F. 

 Driggers " ; 7 females from New Brunswick, N. J. ; 1 female bearing 

 record number 144 with data " J. L. Zabriskei, Nyak, N. J., Feb. 

 6, '84 " ; 3 females and 1 male on one mount, labeled " From Fitch's 

 collection " ; 6 females and 1 male reared by Dr. L. L. Huber, May 

 11, 1921, from galJs of '' Solenozopheria vaccinii'''' in New York; 

 also a series bred by Dr. A. C. Kinsey from " S. vaccinii " at Forest 

 Hills, Mass., as follows-: May 9 to June 3, 1928, 7 females and 3 

 males; May 5 to 24, 1918, 5 females and o males. A series of 1 

 female and 7 males with the record number 323 °% 24/484 and 323 °^, 

 24/484, came from a ''cynipid gall on the roots of Amiromeda 

 ligustrina from Koebele, Holderness, N. H." Two specimens are 

 labeled " Ottawa, Can.," and L. H. Weld sent me three females and 

 a male that he reared from the kidney-shaped gall on stems of 

 Vaccinium at Glencoe, 111., on May 7, 1913. Mr. Weld deposited in 

 the National Museum collection a series of 15 females and 8 males 

 bred from galls on the same plant at East Falls Churcli, Va.. on 

 April 24, 1927. 



The host gall of this chalcid was long believed to be formed by a 

 species of Cynipidae, 8olenozophe7na vaccinii Ashmead,® but B. F. 

 Driggers definitely demonstrated ^ that the maker of this common 

 reniform swelling on the stems of " cultivated " highbush blueberry 

 {Vaccinium co7ymbosuvi) is the chalcidoid Hemadis nuMlipennis 

 Ashmead, in whose gall D. vacciniicola lives. 



• Trans. Amer. Ent. Soc, vol. 14, p. 149, 1887. 



* Journ. New York Ent. Soc. vol. 35, pp. 253-250, 1927. 



