30 
is pinned in a normal position in his cabinet or exhibition box. In 
the genus at present under notice, there is another set of species in 
South America, of small size and superficially similar appearance, in 
which the distinction between the dark-faced and the pale-faced is 
again of the greatest value. 
On the whole, indeed, Acidalia has a remarkably constant general 
facies. If we turn our attention for the moment to my other main 
genus, / tychopoda, we find considerably more diversity of scheme. 
Even if we do not agree with Meyrick and Staudinger in including 
m the same genus the gaily-coloured Eois (typified by E. muricata, 
Hutu.), or the prettily banded Cosmorho'e (rusticata, Schiff.), we have 
still a good number of banded, blotched, or strongly speckled forms 
(such as acersata, degeneraria, dimidiata, trigeminata, contiguaria, seriata 
— vugala) ia, to mention some of the British), and comparatively few 
(e.g., inornata, dilutaria=holosericata), with nothing but plain “wave” 
markings on a plain ground ; even humiliata is redeemed from this 
1 } 1 ?. no * iori y ^y its bright red costa. But with Acidalia the case is very 
different. There are only, so far as I can discover, four types of 
markings known in this genus, not merely in Britain, but throughout 
the world ; and three of these belong to compact groups, which there 
aie some ground for believing may prove to have separate generic 
value. One of these consists only of immorata, Linn., and tessellaria, 
Boisd., which Mr. Burrows wants to remove on the genitalia. Another 
is the ornamentally bordered group typified by ornata (containing also 
( ecoiata and several others); but they all have an excision in the middle 
of the termen of the hindwing, and can form the genus Scopula, Schrank 
~ t ' aspedia, Hub., Warr. A third is the heavily and irregularly dusted 
(and often more or less spotted) group of which marginepunctata is the 
British representative ; this, too, may make the foundation of a future 
genus, as the leg structure, at least, is less stable than in the typical 
group. Removing these three groups, then, what have we left? A 
mass of species with an antemedian and a few postmedian waved lines, 
usually a dark discal dot, and a more or less diffuse “ median shade,” 
which may be either about parallel ivith the termen, or more or less 
oblique. A few examples will suffice: floslactata (= remutaria ), 
strigilarm, emutaria, and the nemoraria group, on which I have already 
been holding forth. A little variety is obtained in the shape of the 
termen of the hindwing, which may be either rounded (as in immutata , 
etc.) or subangled (as in strigilama ). Species very closely resembling 
the last-named can be shown from almost all parts of the w r orld—<v/.» 
perlata, Walk., from Australia, certain forms of enucleata, Guen., from 
N. America, napariata, Guen., from S. America, etc.; similarly, 
counterparts, or nearly so, of the little ochroleucata, H.-S., of Southern 
Europe, may be found in remotata, Guen., from India, minorata, Boisd., 
iom S. xAirica, and many others, including some from S. America, one 
of which I am describing from Buenos Aires. The only parts of the 
world w'here the genus does not seem to be at home, are Chili, Pata¬ 
gonia, the Sandwich Islands and New r Zealand. 
Ihe facies which I have discussed as typical of Acidalia, recurs in 
another nearly related genus which has been interesting me. This is 
the Lycauges of Butler, founded on a Japanese type, but now known to 
occur across China into India and right aw'ay to S. Africa, and in 
xx. 
