30 PROCEEDINGS OF THE NATIONAL MUSEUM vi.i. 6S 



Differs from the precedino- species by having longer and more 

 slender antennae which are black instead of brown and in having a 

 much longer ventral spine. 



Type.—Cfit. No. 28056, U.S.N.M. Type and 7 paratypes. Para- 

 types in American Museum, Field, Stanford, Harvard, California 

 Academy, and Philadelphia Academy. 



Host. — Quercus lohata. 



Gall. — A seed-like cell hidden under the bud scales as in the 

 case of the preceding species but broadest at the base and tapering 

 gradually to a conical and much more pointed apex which lacks a 

 scar. It has a smoother tan-colored surface and a much thinner wall 

 (.05 mm). Length 2.8 mm. by 1.2 mm. in diameter near base, reach- 

 ing much nearer to the apex of the bud than the preceding. Exit 

 hole .9 mm. in diameter, in side of bud. One or rarely two in a bud. 



Habitat. — Cottonwood, Calif. Reared in January and early Feb- 

 ruary from same sending of material as tlie preceding species. 



DIPLOLEPIS PALUSTRIS (Osten Sacken) 



Galls were collected at Evanston. Winnetka, Ravinia, and Willow 

 Springs, 111.; Miller, Ind.; Onekama (T. Hatfield), ^klich.: Cedar 

 Rapids (J. H. Scott), Iowa; East Hampton (C. R. Crosby), N. Y, ; 

 Plummor Island and Chesapeake Beach. Md.; L'alls Clinrch. A]!?xan- 

 clria, Rosslyn, and at Apple Orchard Camp in Bedford County, Va. 



The young galls appear with the leaves in the spring being as 

 large as a pea when the leaves are an inch and a half long. Seven- 

 teen daj's later adults were emerging. In the Chicago area the 

 following emergence records indicate the variation from season to 

 season: May 31, 1906, June 19, 1907, May 28, 1908, June 12, YMK 

 May 26, 1911. The galls sometimes occur on the axis of the stam- 

 inate flowers. 



Brodie collected galls on red oak at Toronto, Canada, where adults 

 emerged July 2-10, 1888 and June 6-9, 1889. 



DIPLOLEPIS PEDUNCULATA (Bassett) 



The galls of this species were collected on Quercus covcinea at 

 Winnetka, Glencoe, Ravinia, Fort Sheridan, and Waukegan, 111., and 

 on Q. maxima at Rosslyn, Va., where they seemed to be full groAvn 

 by May 16. Crosby collected them at East Hampton, Long Island. 

 The writer reared adults from Winnetka galls on June 24. 



DIPLOLEPIS POLITA (Bassett) 



Galls have been seen at Tuxedo (F. V. Rand), Md.; Washington, 

 D. C. ; Falls Church, Va. ; Jacksonville, Daytona, Ocala, and Gaines- 

 ville, Fla.; Clyde, Sisco, Eastland, Ranger, Mingus, Gordon, Santo, 

 Weatherford, Mineola, Palestine, and Trinity, Tex. ; Hugo and Tus- 



