137 
second group, but I have no doubt that P. aurifer and the 
Xyloco'pa have been introduced in timber from America. 
Metacoelus and Spalangia are parasites on the house fly. 
Neither of them is, I believe, common in Europe; nor am I 
aware if they inhabit America. A species of Spalangia 
has been found in the Galapogos Archipelago. 
The genera Prosopis, Megachile, Odynerus, Leptogenys, 
Pimpla, Ophion, Limneria, Chelonus, Epitranus, Chalcis, 
Eupelmus, and Evania have a wide range over the earth. 
The genus Echthromorpha is, so far as we know, confined to 
Oceanic Islands, the five known species being from the 
Hawaiian Islands, St. Helena, Ascension, and Tahiti, Society 
Isles, in which latter island a new species has recently been 
discovered by Mr. J. J. Walker, KN. The genera Sierola, 
Moranila, and Solindenia are only known from the 
Archipelago, but our knowledge of the Chalcididae is not 
sufficient to enable me to say anything very definite about 
the affinities of the island species. Sierola and Scleroderma 
belong to a group of much interest, being one which is 
intermediate between the Terebrant and Aculeate Sections 
of Hymenoptera. A species of Scleroderma, it may be 
noted, is found in St. Helena. 
Smith offers the opinion that the Hymenoptera are most 
nearly related to the American fauna. On this point I am 
not prepared to offer an opinion at present ; and I rather 
think that Smith formed his conclusion on the occurrence 
of Xylocopa ceneipennis, Polistes aurifer, &c., which have 
been introduced, as I believe, by Man’s Agency, and conse- 
quently must not be taken into account in judging of the 
affinities of the endemic species. 
The following is the literature relating to the Hymenop- 
tera of the Archipelago : — 
Fabricius. — Ent. Syst., II. p. 269 (Odynerus radula). 
F. Smith. — Cat. of Hymen. Ins., I., p. (Prosopis flavipes 
and P. anthracina). 
