glaucus-第26节
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animals; the pickings of any pond; a minnow or two; an eft; a few
of the delicate pond…snails (unless they devour your plants too
rapidly): water…beetles; of activity inconceivable; and that
wondrous bug the Notonecta; who lies on his back all day; rowing
about his boat…shaped body; with one long pair of oars; in search
of animalcules; and the moment the lights are out; turns head over
heels; rights himself; and opening a pair of handsome wings; starts
to fly about the dark room in company with his friend the water…
beetle; and (I suspect) catch flies; and then slips back demurely
into the water with the first streak of dawn。 But perhaps the most
interesting of all the tribes of the Naiads; … (in default; of
course; of those semi…human nymphs with which our Teutonic
forefathers; like the Greeks; peopled each 〃sacred fountain;〃) …
are the little 〃water…crickets;〃 which may be found running under
the pebbles; or burrowing in little galleries in the banks: and
those 〃caddises;〃 which crawl on the bottom in the stiller waters;
enclosed; all save the head and legs; in a tube of sand or pebbles;
shells or sticks; green or dead weeds; often arranged with quaint
symmetry; or of very graceful shape。 Their aspect in this state
may be somewhat uninviting; but they compensate for their youthful
ugliness by the strangeness of their transformations; and often by
the delicate beauty of the perfect insects; as the 〃caddises;〃
rising to the surface; become flying Phryganeae (caperers and sand…
flies); generally of various shades of fawn…colour; and the water…
crickets (though an unscientific eye may be able to discern but
little difference in them in the 〃larva;〃 or imperfect state)
change into flies of the most various shapes; … one; perhaps; into
the great sluggish olive 〃Stone…fly〃 (Perla bicaudata); another
into the delicate lemon…coloured 〃Yellow Sally〃 (Chrysoperla
viridis); another into the dark chocolate 〃Alder〃 (Sialis lutaria):
and the majority into duns and drakes (Ephemerae); whose grace of
form; and delicacy of colour; give them a right to rank among the
most exquisite of God's creations; from the tiny 〃Spinners〃 (Ba塼is
or Chloron) of incandescent glass; with gorgeous rainbow…coloured
eyes; to the great Green Drake (Ephemera vulgata); known to all
fishermen as the prince of trout…flies。 These animals; their
habits; their miraculous transformations; might give many an hour's
quiet amusement to an invalid; laid on a sofa; or imprisoned in a
sick…room; and debarred from reading; unless by some such means;
any page of that great green book outside; whose pen is the finger
of God; whose covers are the fire kingdoms and the star kingdoms;
and its leaves the heather…bells; and the polypes of the sea; and
the gnats above the summer stream。
I said just now; that happy was the sportsman who was also a
naturalist。 And; having once mentioned these curious water…flies;
I cannot help going a little farther; and saying; that lucky is the
fisherman who is also a naturalist。 A fair scientific knowledge of
the flies which he imitates; and of their habits; would often
ensure him sport; while other men are going home with empty creels。
One would have fancied this a self…evident fact; yet I have never
found any sound knowledge of the natural water…flies which haunt a
given stream; except among cunning old fishermen of the lower
class; who get their living by the gentle art; and bring to indoors
baskets of trout killed on flies; which look as if they had been
tied with a pair of tongs; so rough and ungainly are they; but
which; nevertheless; kill; simply because they are (in COLOUR;
which is all that fish really care for) exact likenesses of some
obscure local species; which happen to be on the water at the time。
Among gentlemen…fishermen; on the other hand; so deep is the
ignorance of the natural fly; that I have known good sportsmen
still under the delusion that the great green May…fly comes out of
a caddis…bait; the gentlemen having never seen; much less fished
with; that most deadly bait the 〃Water…cricket;〃 or free creeping
larva of the May…fly; which may be found in May under the river…
banks。 The consequence of this ignorance is that they depend for
good patterns of flies on mere chance and experiment; and that the
shop patterns; originally excellent; deteriorate continually; till
little or no likeness to their living prototype remains; being tied
by town girls; who have no more understanding of what the feathers
and mohair in their hands represent than they have of what the
National Debt represents。 Hence follows many a failure at the
stream…side; because the 〃Caperer;〃 or 〃Dun;〃 or 〃Yellow Sally;〃
which is produced from the fly…book; though; possibly; like the
brood which came out three years since on some stream a hundred
miles away; is quite unlike the brood which is out to…day on one's
own river。 For not only do most of these flies vary in colour in
different soils and climates; but many of them change their hue
during life; the Ephemerae; especially; have a habit of throwing
off the whole of their skins (even; marvellously enough; to the
skin of the eyes and wings; and the delicate 〃whisks〃 at their
tail); and appearing in an utterly new garb after ten minutes'
rest; to the discomfiture of the astonished angler。
The natural history of these flies; I understand from Mr。 Stainton
(one of our most distinguished entomologists); has not yet been
worked out; at least for England。 The only attempt; I believe; in
that direction is one made by a charming book; 〃The Fly…fisher's
Entomology;〃 which should be in every good angler's library; but
why should not a few fishermen combine to work out the subject for
themselves; and study for the interests both of science and their
own sport; 〃The Wonders of the Bank?〃 The work; petty as it may
seem; is much too great for one man; so prodigal is Nature of her
forms; in the stream as in the ocean; but what if a correspondence
were opened between a few fishermen … of whom one should live; say;
by the Hampshire or Berkshire chalk streams; another on the slates
and granites of Devon; another on the limestones of Yorkshire or
Derbyshire; another among the yet earlier slates of Snowdonia; or
some mountain part of Wales; and more than one among the hills of
the Border and the lakes of the Highlands? Each would find (I
suspect); on comparing his insects with those of the others; that
he was exploring a little peculiar world of his own; and that with
the exception of a certain number of typical forms; the flies of
his county were unknown a hundred miles away; or; at least;
appeared there under great differences of size and colour; and
each; if he would take the trouble to collect the caddises and
water…crickets; and breed them into the perfect fly in an aquarium;
would see marvels in their transformations; their instincts; their
anatomy; quite as great (though not; perhaps; as showy and
startling) as I have been trying to point out on the sea…shore。
Moreover; each and every one of the party; I will warrant; will
find his fellow…correspondents (perhaps previously unknown to him)
men worth knowing; not; it may be; of the meditative and half…
saintly type of dear old Izaak Walton (who; after all; was no fly…
fisher; but a sedentary 〃popjoy〃 guilty of float and worm); but
rather; like his fly…fishing disciple Cotton; good fellows and men
of the world; and; perhaps; something better over and above。
The suggestion has been made。 Will it ever be taken up; and a
〃Naiad Club〃 formed; for the combination of sport and science?
And; now; how can this desultory little treatise end more usefully
than in recommending a few books on Natural History; fit for the
use of young people; and fit to serve as introductions to such
deeper and larger works as Yarrell's 〃Birds and Fishes;〃 Bell's
〃Quadrupeds〃 and 〃Crustacea;〃 Forbes and Hanley's 〃Mollusca;〃
Owen's 〃Fossil Mammals and Birds;〃 and a host of other admirable
works? Not that this list will contain all the best; but simply
the best of which the writer knows; let; therefore; none feel
aggrieved; if; as it may chance; opening these pages; they find
their books omitted。
First and foremost; certainly; come Mr。 Gosse's books。 There is a
playful and genial spirit in them; a brilliant power of word…
painting combined with deep and earnest religious feeling; which
makes them as morally valuable as they are intellectually
interesting。 Since White's 〃History of Selborne;〃 few or no
writers on Natural History; save Mr。 Gosse; Mr。 G。 H。 Lewes; and
poor Mr。 E。 Forbes; have had the power of bringing out the human
side of science; and giving to seemingly dry disquisitions and
animals of the lowest type; by little touches of pathos and humour;
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