2 78 FAUNA HAWAIIENSIS 



Judging from these collections alone, the parasitic Hymenoptera of the Hawaiian 

 Islands would seem to be much less numerous in species than are the Aculeata, since 

 Messrs Perkins and Forel, in the first part of this work, enumerated, with the common 

 Apis mellifica, two hundred and one species of Aculeata, while in the present paper, 

 after a careful examination of nearly 1500 specimens included in the above-mentioned 

 collections, and with the published records, only one hundred and twenty-eight species 

 can be enumerated. 



Although many of these species are apparently new and are here described for the 

 first time, it is nevertheless a poor showing when we consider the great abundance of 

 these insects everywhere, and remember that the parasitic Hymenoptera of the world, 

 in species, exceed very many times all of the Aculeata and other Hymenoptera 

 combined. 



Bearing this fact in mind, the discrepancy between the known Aculeata and the 

 Parasitica of these Islands is, therefore, much too great, and the list of the parasitic 

 species given here can represent only a small percentage of the species occurring there ; 

 especially since many of the common parasitic families, which must surely occur, are 

 entirely unrepresented and we may naturally expect soon many additions to this list. 



Classification of the Hymenoptera. 



Of the 10 superfamilies and the 94 families recognized by the writer in his recent 

 classification of the Hymenoptera', five of the superfamilies and thirty of the families 

 have been found to have representatives in the Hawaiian Islands. 



In Vol. I. part i. of this work, Messrs Perkins and Forel, under the general title 

 Hymenoptera Aculeata, treat of 16 of these families, under eight family names, while 

 the remaining families, 14 in number, will be treated here under the general title 

 Hymenoptera Parasitica, the sequence of these families being in accordance with the 

 proposed Classification. 



It seems advisable, therefore, before discussing these parasitic families, to give first 

 a brief resume of the arrangement of all of these superfamilies and families found in the 

 Hawaiian Islands so that the arrangement of the families in this part, being so different 

 from that in the text of the first part, devoted to the Hymenoptera Aculeata, may be 

 better understood and made to harmonize. 



Systematic arrangement of the Hawaiian Hymenoptera. 



The superfamilies, families, subfamilies and genera now known from these Islands 

 may be arranged, in accordance with the Author's own views, as follows : — 



' Proc. U. S. Nat. Mus., x.xni. 1900, pp. 191 — 205. 



