On the Variation of Species, with Especial Reference to the Insecta: Followed by an Inquiry into the Nature of Genera — John Shaqi
On the Variation of Species, with Especial Reference to the Insecta: Followed by an Inquiry into the Nature of GeneraWollaston, Thomas Vernon
Science
On the Variation of Species, with Especial Reference to the Insecta: Followed by an Inquiry into the Nature of Genera
Wollaston, Thomas Vernon
Insects; Variation (Biology)
The _Bembidium bistriatum_, Dufts., is usually much paler when found
in saline districts (under which circumstances it was described as a
distinct species by Mr. Stephens) than when occurring in more inland
positions. The _Blemus areolatus_, Creutz., I have frequently remarked
is similarly affected in brackish places: and I think it far from
improbable that the _Stenolophus Skrimshiranus_, Steph., is but a
local modification (though not altogether, perhaps, through marine
influences) of the _S. Teutonus_, Schr. The _Dromius fasciatus_,
Gyll., not being _exclusively_ littoral, may be quoted as another case
in point,--the specimens which are collected near the coast being for
the most part singularly pale. In speaking of the _Anthicus
bimaculatus_, Illig., M. de la Ferte observes: "Il y a sculement lieu
de remarquer que les individus du bord de l'ocean sont generalement
plus pales que ceux des contrees orientales de l'Europe, et que ceux
des cotes de France et de Belgique sent entierement depourvus de tache
discoidale[27]." And bearing, in much the same manner, on the subject
of variations, the _Anthicus humilis_, Germ., "est une des especes le
plus generalement repandues en Europe; mais il lui faut le voisinage
de l'eau salee. Aussi on le rencontre non-seulement sur les rivages de
toutes les mers, meme de la Baltique, mais encore aux bords des lacs
sales, tels que celui de Mannsfeld, en Saxe. _Ceux de cette derniere
localite sont generalement noirs_; ceux que j'ai pris a Perpignan sont
d'un rouge tres-clair, ce qui me porte a croire que cette espece est
dans le meme cas que quelques autres _Anthicus_, dont les varietes les
plus foncees appartiennent au nord de l'Europe, et les plus pales au
midi[28]."
Public-domain text, read in full here on John Shaqi.
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