(719. 5 
XXXI. New species of Hawaiian Hymenoptera, with notes 
on some previously described. By R. C. L. 
PERKINS, D.Sc., M.A., F.E.S. 
[Read November 15th, 1911. ] 
SINCE the descriptions of the Aculeate Hymenoptera were 
completed in the “ Fauna Hawaiiensis,” I have obtained the 
old collection formed by the Rev. T. Blackburn, wherein 
are a number of types of species that he described himself, 
as well as examples of the species that he sent for 
description to F. Smith and Cameron. The examination 
of this collection has enabled me to settle a number of 
doubtful points, and I take the opportunity of describing 
some new species. The genus Nesoprosopis, to which the 
bees, here described, belong, is very interesting from its 
strange and excessive development in the Hawaiian group, 
more than fifty species having been described from this 
small area. Outside the islands I have, until recently, 
been acquainted with only one other species of the genus, 
the European WV. kriechbaumeri, Forst., which, by a rather 
curious coincidence, since the genus was made by myself 
for. the reception of the Hawaiian species, I happened to 
be the first to meet with in England. Recently I have 
received another species of the genus from Mr. J. C. 
Kershaw, collected by him in China, so that it probably 
extends right across Europe and Asia, though I suspect 
the number of species may be limited. I have included 
a description of the Chinese species in this paper. Should 
the genus not be found in the New World, one would 
naturally conclude that the Hawaiian forms were 
descendants of an ancient Asiatic immigrant. I have 
found nothing allied to Nesoprosopis in the very numerous 
Australian Prosopidae that I have examined. It may 
also be noted here that I have received Megachile schau- 
inslandi, which was introduced into the islands between 
twenty and thirty years ago, amongst some Hymenoptera 
collected by Mr. Kershaw. Though its appearance was 
Oriental, we had no previous knowledge that it was found 
in China. 
TRANS. ENT. SOC, LOND. 1911.—PART IV. (JAN.) 
