Fore-wings Sentence Examples
Tower (1903), of nervures similar to those of the hind-wing, and by the proof that the small membranous structures present beneath the elytra of certain beetles, believed by Meinert to represent the whole of the true fore-wings, are in reality only the alulae.
The hard fore-wings (elytra) are strengthened with marginal ridges, usually inflected ventrally to form epipleura which fit accurately along the edges of the abdomen.
When wings are present, the fore-wings are small firm elytra, beneath which the delicate hind-wings are complexly folded.
Wings usually developed; the fore-wings much larger than the hind-wings.
Fore-wings modified into firm elytra, beneath which the membranous hind-wings (when present) can be folded.Advertisement
Fore-wings well developed; hind-wings reduced to stalked knobs (" halteres ").
The latter has established, for all the Palaeozoic insects, an order Palaeodictyoptera, there being a closer similarity between the fore-wings and the hind-wings than is to be seen in most living orders of Hexapoda, while affinities are shown to several of these orders - notably the Orthoptera, Ephemeroptera, Odonata and Hemiptera.
As shown by the number and variety of species, the Orthoptera are the most dominant order of this group. Eminently terrestrial in habit, the differentiation of their fore-wings and hindwings can be traced from Carboniferous, isopteroid ancestors through intermediate Mesozoic forms. The Plecoptera resemble the Ephemeroptera and Odonata in the aquatic habits of their larvae, and by the occasional presence of tufted thoracic gills in the imago exhibit an aquatic character unknown in any other winged insects.
A pair of small plates - the tegulae - are very generally present at the bases of the fore-wings.
In the hind-wings - on account of their reduced size - the nervures are even more reduced than in the fore-wings.Advertisement
The true wasps have the fore-wings folded lengthwise when at rest and the fore-legs of normal build - not specialized for digging.
The fore-wings are sometimes membranous like the hind-wings, usually they are firmer in texture, but they never show the distinct areas that characterize the wings of Heteroptera.
On the other hand, the reduced feelers, the numerous Malpighian tubes (40), the large complex eyes, the vestigial condition of the jaws, the excessive size of the fore-wings as compared with the hind-wings and their complex neuration with an enormous number of crossnervules are all specializations.
Among day-flying Lepidoptera, the more gaudy colors are usually on the fore wings.