Pyralidina of the Hawaiian Islands. 211 
North America in their affinities. Aciptilia appears 
absent, though represented by four species in New 
Zealand, and in the South Pacific by a widely-distributed 
species which occurs in many islands, as well as in 
Australia; but it is barely represented in North 
America. 
The three species of Crambide are all referable to 
Hednota, and this is a very interesting identification. 
They are all of the lowest and most ancestral type of 
the genus, approximating to Diptychophora. Hitherto 
Hednota has been practically confined to Australia, 
where it is considerably developed; there is, indeed, a 
distinct species in New Zealand, but it is certainly to be 
traced to Australian origin. Diptychophora is confined 
to the Southern Hemisphere, and is largely characteristic 
of New Zealand, occurring also in South America and 
Australia. Probably the small and obscure Hawaiian 
species of HTednota are forms only preserved by isolation 
from extinction; in Australia they are superseded by 
large and handsomely-marked species of the same genus, 
evidently in a flourishing state; but everywhere else 
the genus appears to have been completely replaced by 
Crambus, which is not indigenous in Australia. I am 
disposed to be surprised that Crambus is not found in 
the Hawaiian Islands; it might have been expected to 
find its way from North America. 
The two species of Phycitide are stray wanderers. 
One is an Homaosoma, a genus of few species, but 
represented by one or two distinct species almost every- 
where. ‘The larve probably feed in the seed-heads of 
Composite, and it is likely that the ova may be trans- 
mitted with the seeds of these. The other I have 
described as a new genus; it is nearly allied to the 
Australian Crocydopora, which also occurs (possibly 
introduced) in New Zealand. 
On the whole, it will be seen that the Pyralidina of 
the Hawaiian Islands, although specifically highly 
peculiar, hardly present that amount of generic speciali- 
sation which might have been expected. I should be 
disposed to infer that this portion of their fauna 
consisted of two elements, viz. (1), a larger portion, 
composed of species whose ancestors were derived from 
North America, at a date sufficiently remote to allow of 
a great deal of specific development, and even a certain 
