I 
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III. 071 the, genus Deuterocopiis, Zdlc7\ By T. Bain- 
BRiGGE Fletcher, R.N., F.E.S. 
[Read Decembei’ 1st, 1909.] 
Plates XLIV, XLV. 
The present paper deals with those species of the 
Ftco’ophoo'idae in which the forewing is cleft into three 
lobes. Hitherto all these forms have been included in 
the single genus Deute7'oc(ypus, 2i., but, owing on the one 
hand to the very distinctive appearance of members of 
this group, and on the other hand to the insufficiency of 
former descriptions based on very scanty material, great 
confusion has resulted, three or four distinct species often 
being referred to under one common name (and that often 
wrongly applied to any one of them). Tliis paper is an 
attempt at a revision, not only of the species of these 
little Plume-moths so far as ive know them at present, 
but also of all the previously published literature concerning 
this group. 
I may say at once that such a task would have been 
quite impossible without the kind help rendered by Lurd 
Walsingham, who most generously put at my disposal the 
whole of his unrivalled series for examination and de¬ 
scription, and I take this opportunity of acknowledging my 
indebtedness. 
So far as we know them at present, the Plume-moths 
with trifid forewings are included in three genera, two of 
which are here described as new, and consist of only 13 
species. Their head-quarters appear to be in the Indo- 
Malayan region, but further research will probably show 
that these little moths are widely distributed throughout 
the Tropics. 
The three genera may be artificially tabulated as 
follows:— 
Fo7'ewing with tlwee scginents. 
2. f 
\ 
General appearance Trichoptiline, first cleft from about 
abdomen long and slender .... Hexadactilia 
General appearance Oxyptiline, first cleft from beyond i, 
abdomen short and stout. ....... 2 
Second cleft at least {y length of first . . Deuterocopns 
Second cleft not more than J length of first Leptodeiiterocopxs 
TRANS. ENT. SOC. LOND. 1910.— PART II. (JUNE) 
