It is black, with a bright vermilion patch on the middle of the body; and it is so well recognised by this conspicuous coloration that even the spider-hunting wasps avoid it.
This latter coloration does not appear to be protective when the insect is seen in the cabinet, but it really is so.
Only a few cases of this kind of coloration have yet been observed, chiefly among spiders and mantidae; but, no doubt, if attention were given to the subject in tropical countries, many more would be discovered.
The coloration of his orchestra, the cries of his instruments, the line of his melody, the throbbing of his pulses, make us feel the great tide sweeping us on, the wave rolling over all the world.
In the first of them his language emerges, to an extent imparting its unmistakable coloration to a matter perhaps not entirely distinguished.
Much of the half-mystical, half-sensual coloration of his orchestra is due them.
There should be no marked coloration in either case if the resin is that of pure vanilla.
Confirm by adding a drop or two of ammonia to the second half of the amyl alcohol extract and a violet coloration will be produced if cochineal is present.
If copper be present a purplish or reddish-brown coloration will be produced.
A violet coloration at the union of the two liquids indicates the presence of formaldehyde.
A red or brownish precipitate or coloration proves the presence of copper.
A green coloration is produced when formaldehyde is present.
If 1 per cent or more of starch is present, a blue coloration will be produced.
Whenever a reddish to an orange, or brown coloration results, the presence of a foreign vegetable oil is indicated (probably a seed oil).
If a pink to violet-red coloration is produced in a short time the presence of an azo-color is indicated.
A purple or violet coloration proves the presence of salicylic acid, which in turn indicates the presence of saccharin.
When only a very small amount of the acid is present the red coloration will be destroyed on diluting with water, but may be restored by concentrating the liquid.
A blue or green coloration shows the presence of mineral acids.
The question here concerned is, whether Darwin is correct when he in this manner attributes the entire coloration of butterflies to sexual selection.
The blue-green coloration remains unchanged; but a somewhat darker green dorsal line becomes apparent down the middle of the back (the dorsal vessel?
The winter form of Pieris Napi also no longer preserves, in the female sex, the striking coloration of the ancestral form Bryoniæ, a fact which may indicate the influencing of the winter generation by numerous summer generations.
Marcellus and Telamonides; general coloration pale; the lunules all obsolescent; 2 large red anal spots not connected; frontal hairs medium length, as in Telamonides.
Only small differences in coloration became perceptible in the head and horn, these changing to bluish.
The remaining peculiarities of coloration are shown in the figure.
In Beddard’s Animal Coloration note is taken of the green fur of the sloth as a most uncommon if not unique phenomenon.
Again, there are certain species of butterflies which have put on a coloration and a form the effect of which is to aid them in evading the attacks of birds.
Danais butterfly which is protected by its disagreeable taste from the usual enemies of the tribe, and which is altogether unlike in shape and coloration to the swallow-tail.
Our specimen closely resembles eight specimens from Coahuila, Mexico, in general coloration and, especially, in the pattern of colors on the outer rectrices.
Breeding was in progress at both localities, as evidenced by the presence of eggs in the oviducts of several females, by the heightened coloration of both sexes, and by mating behavior.
The most convincing proof of the reality of protective coloration is in the change of plumage or fur of some of the wild creatures to suit the season.
The various shades and tints of sandstone are necessarily due to the coloration of the individual grains.
One of the most powerful stimulations to either sex is glitter, in the most general sense, and the interest in showing off begins in the coloration and plumage of animals, and continues as ornament in the human species.
In one case only was a slight orange coloration produced.
No coloration or precipitation occurs (salts of the heavy metals).
Let us look briefly at the other instances of protective colorationin nature generally which lead up to these final bizarre exemplifications of the masquerading tendency.
The paper is now closely watched, The test is complete when a very faint brown coloration makes its appearance at the line of boundary between the dry and moist parts of the paper.
Bromine solution is added drop by drop until the slight coloration is permanent, excess of bromine being got rid of by boiling for a minute or two with a little more caustic potash.
It is then washed repeatedly with the same solution until the washings give nocoloration with ammonium sulphide, and afterwards washed with acetone until washings give no residue on evaporation dried and weighed.
Nitric acid produces a yellow coloration when applied in dilute solution for a short time.
By simply brushing an aqueous solution of lead acetate, also known as sugar of lead, on a white fur such as white hare or rabbit, a light, brownish coloration is obtained due to the combination of the lead with the sulphur of the hair.
Any special bright coloration of the rocks of a district merits investigation.
Test some of the gold with nitric acid; effervescence or evolution of red fumes, or coloration of the acid prove impurities to be present.
Platinum wire, some 3 inches long, conveniently fused into a piece of glass tube as a handle, is used to test thecoloration of minerals in the flame.
Another test for gold is to take the solution as above obtained and add thereto a solution of chloride of tin, when you obtain a purple coloration that has been called the purple of Cassius.
Speaking of these mountains in a general way, they are bare masses whose coloration trembles between misty blue and mauve according to distance, light, and hour of day.
The coloration of caterpillars is as remarkable in the variety which it displays as is the ornamentation by means of the prominences of which we have just spoken.
There is great variety in the form as well as in the coloration of the wings.
The insect on the under side sometimes has the outer margin of the secondaries marked with spots of bright pinkish-red, resembling in this style of coloration certain species of the genus Delias of the Indo-Malayan fauna.
Certainly Cott's (1940) voluminous compilation of the literature on adaptive coloration should make the most skeptic hesitate to conclude dogmatically that these instances of mimicry are merely accidental and meaningless.
B, Dead individual showing the bright red coloration (very dark areas) characteristic of infection with Serratia marcescens.
Hillel Levinson, Quartermaster bacteriologist, from dead specimens found in our laboratory colonies which showed the red coloration characteristic of insects that have died with infections of S.
In living individuals from Costa Rica and Panama west of the Canal Zone, the bluecoloration on the flanks and thighs is much less conspicuous than in specimens from eastern Panama.
The coloration of the tadpoles is not distinctive, except for the presence of dorsal blotches on the tails of S.
Other differences in coloration in members of the baudini group are relative and subtle.
The coloration of Smilisca sila consists of a gray, tan, or pale reddish brown dorsal ground color and a creamy white venter.
The coloration in life is highly variable; much of the apparent variation is due to metachrosis, for individuals of Smilisca baudini are capable of undergoing drastic and rapid change in coloration.
The coloration in life is as variable as it is in preservative.
Individuals of this species are capable of changing the dorsal coloration from green to brown in a short period of time.
The coloration in the living frogs is highly variable due to extreme metachrosis.
Note that in the earlier discussion of coloration of preserved specimens, the green spots and borders have changed to pale blue after six months in alcohol.
Some individuals have both green and brown coloration in life.
Unfortunately, the topotypes of beatae lack external measurements and are subadults, but their coloration agrees with that of other specimens that are here referred to beatae.
The red coloration disappears, a part of the iron perchloride is washed out, and in the parts which have not been acted on by light the perchloride is transformed into sesquioxide.
Red coloration is due to decomposition into ferrocyanide of copper.
However, a slight coloration of the lines is not very objectionable, for it disappears by a longer washing after the development.
These five specimens, and indeed the three from Deming Station alone, show intergradation in colorationof the feet between Didelphis marsupialis texensis and Didelphis virginiana pigra.
