2 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 76 



known history at the disposal of the authors has proved a very great 

 boon to basic taxonomic work in this group, and is probably an ad- 

 vantage not enjoyed to so great an extent by any previous workers 

 on the genus. 



The external structural characters of the two sexes differ so widely 

 that association on morphological resemblances can safely be made 

 only in isolated cases where some striking character is present in both. 

 The sexes have been correctly associated in several species by rearings 

 from known parentage. A number of species are still known in lit- 

 erature by different names for each sex: such a condition can be elimi- 

 nated but slowly through rearings and more extensive collecting. 

 Females have been selected as types whenever possible, because this 

 sex possesses more valuable diagnostic characters, and is more impor- 

 tant from the point of view of biological control. 



This paper is a statement of the writers' present knowledge of 

 the taxonomy of Tiphia from Japan, Chosen (Korea), China, and 

 India, A more extended study should be made of the types from 

 this region which are deposited in the museums of Europe, but at 

 present the authors are not in a position to do this. Since consid- 

 erable biological and economic data are, how^ever, now awaiting pub- 

 lication, it is deemed advisable to pave the way by the publication of 

 this preliminary taxonomic ])aper. 



All of the types of new species described in this paper, along 

 with a large number of paratype specimens, have been deposited in 

 the United States National Museum. Wherever they could be spared, 

 paratypes and determined specimens have been deposited in the 

 British Museum, which, of all institutions, has the largest collection 

 of types of Tiphia from eastern Asia. Similar material has been 

 deposited in the collection of the Illinois Natural History Museum, 

 which is rich in North American Tiphia worked over several years 

 ago by J. K. Malloch, and in the collection of the Philadelphia 

 Academy of Natural Sciences, which also has a large collection of 

 Tiphia. Representative paratypes and much of the material not in- 

 cluded in type series have been retained in the collection of the 

 Japanese Beetle Laboratory. 



The authors acknowledge the helpful assistance of A, B. Gahan, 

 who not only compared many of their determinations with types, but 

 also allowed them to use his notes on other species found in the 

 British Museum which are not represented iil North American col- 

 lections; of S. A. Rohwer for the use of his notes on Tiphia and 

 for helpful criticism; of Dr. J, Waterston, hymenopterist of the 

 British Museum, for comparisons made with types, and for generously 

 proffering the services of the British Museum; and of Dr. J, Masi 

 for comparisons made at the Museo Civico de Storia Naturale, Genoa, 



