740 Rev. C. R. N. Burrows on the 
locality, I have mit atlantica, but as a matter of fact it 
extends to the Rocky Mountains in Colorado. This is the 
species which most resembles the European nictitans, but 
the sexual pieces of the male differ completely. Pacifica is 
so called from the fact that all the examples seen by me 
come from the Western Coast States. Jnteroceanica occurs 
so far only in the region about Winnipeg. These three 
species I would hardly have dared to separate from 
nictitans, had it not been for the differences in structure 
in the male genitalia, but these are so radical that specific 
identity is out of the question.” Dr Smith’s atlantica is 
identical with americana, Speyer (1875). 
It is to be supposed that the figures of the “clasps ” of 
these species given by Dr. Smith are more accurate than 
that of the supposed nictitans, but in any case, and even 
if allowance be made for great inaccuracies, it is evident 
that not one of these three species is identical with any of 
our four British representatives of the group. 
I may here, perhaps, without presumption, utter a word 
of warning to students of Dr. Smith’s works upon the 
genitalia. I have not come across his “definitions of 
terms,” if such exist, but he appears to have transposed 
the terms “harpe” and “clasper,” as used by previous 
writers, and it were well that his example should not be 
followed, as it causes confusion in an already confused 
field. 
In 1902 (‘‘Entom. Record,” vol. xiv, pp. 116-117), Tutt 
gives a list of “Species and Forms of Lepidoptera, so far 
only recorded from the British Isles.” Here he says of 
paludis, “a quite distinct species, but closely allied to 
H. nietitans,’ but he does not mention /ucens, that insect 
being recognised on the Continent. My opportunity of 
investigation of Continental lepidoptera is strictly limited, 
but it is perhaps suggestive that of forty-four European 
and Asiatic Hydroecias belonging to this group now before 
me, there are several specimens which agree in appearance 
and in genitalia with /wcens, but not one which I dare to 
name paludis. 
It appears to have been at this point that I became 
interested in the study of the group. Nictrtans and 
paludis being both common in my garden at Mucking, I 
desired to possess a series of lducens also. My friends 
responded according to their power, amongst them Mr. 
A. W. Bacot, who had been, with Mr. J. A. Simes, spending 
