2 U.S. NATIONAL MUSEUM BULLETIN 270 



in the U.S. National Museum. Because of certain complexities that de- 

 veloped, this study subsequently became a joint undertaking. The present 

 paper lists all the species, the types of which were deposited in the 

 National Museum, including several whose types have been lost. Au- 

 thors of the species, the types of which are in the National Museum, are 

 Ashmead, Brues, Cockerell, Crawford, Crawford and Bradley, Dozier, 

 Fitch, Fouts, Fullaway, Gahan, Girault, Howard, Jackson, Kamal, Mann, 

 Morrill, Muesebeck, Myers, Nixon, Priesner, Pschorn-Walcher, Riley, 

 Rohwer, Stelfox, Timberlake, Townes, and Wilcox. Most abundant, and 

 most important because they include the type-species of numerous genera, 

 are the species described by Ashmead. A relatively small number of the 

 type-specimens of Ashmead's species are in other institutions, partic- 

 ularly the British Museum (Natural History) and the Zoological Museum 

 of the Humboldt University in Berlin, but the U.S. National Museum con- 

 tains most of them; a number of these are the types of forms which have 

 become the type-species of genera that were described by Foerster with- 

 out originally included species, and some confusion has resulted be- 

 cause of Ashmead's misinterpretation of the Foerster genera. An effort 

 has been made by the senior author to clear up various troublesome 

 problems in the generic taxonomy and nomenclature of the Proctotrupoidea, 

 and pertinent changes are shown in the second supplement of the catalog 

 of the North American Hymenoptera (Krombein and Burks, 1967, pp. 285- 

 305). The present paper essentially follows the treatment of the super- 

 family in that work. The genera are considered in alphabetical order 

 under each family, and the species are arranged alphabetically under the 

 genera, with the center heading for each species showing our present 

 view concerning generic placement. Holotypes are recorded where these 

 are considered as having been established in the original descriptions, 

 and lectotypes are designated where such designations have seemed to 

 be required. The pertinent label data of the holotype or lectotype are 

 given for each specimen, as well as the number assigned to each in the 

 Museum's catalog of insect types. There is also a brief indication of the 

 condition of each type-specimen, followed by mention of the number of 

 additional specimens in the type series. Where an author, in connection 

 with his original description of a species, mentioned a National Museum 

 type number and only one specimen bearing this number i s marked "Type," 

 he is considered to have designated a holotype, even though he did not 

 expressly say so in his description. Should a question be raised as to 

 the validity of this assumption, that specimen is to be considered as 

 having been selected as lectotype by the authors of this paper. In some 

 instances, notably in the Platygasteridae, lectotype selections had al- 

 ready been made; each such selection is mentioned, together with the 

 literature reference. 



