. A textbook of invertebrate morphology [microform]. Invertebrates; Morphology (Animals); Invertébrés; Morphologie (Animaux). TYPE THAC1IKATA. 611. Fig. 2'i8.âA, Anaaa tristin; B, Mouth- I'AUTS OF JVt'/ja cinerea (afier Saviony from OwKN). lb ââ Iiibiiim. m = mandibles. li = tongue. ma = maxilluj. damage to apple-trees. The remarkable lieterogony of these forms has already beeu described (p. 498). lu both the suborders the moutii-parts are adapted for piercing aud sucking. The labium (Fig. 238, B, Ih) is prolonged into a slender, usually four-jointed process, grooved upon its upper sur- face
. A textbook of invertebrate morphology [microform]. Invertebrates; Morphology (Animals); Invertébrés; Morphologie (Animaux). TYPE THAC1IKATA. 611. Fig. 2'i8.âA, Anaaa tristin; B, Mouth- I'AUTS OF JVt'/ja cinerea (afier Saviony from OwKN). lb ââ Iiibiiim. m = mandibles. li = tongue. ma = maxilluj. damage to apple-trees. The remarkable lieterogony of these forms has already beeu described (p. 498). lu both the suborders the moutii-parts are adapted for piercing aud sucking. The labium (Fig. 238, B, Ih) is prolonged into a slender, usually four-jointed process, grooved upon its upper sur- face, the groove being con- vertible into a tube by the closure over it of the long slender mandibles (m) and maxilla? {mx) which form long slender needlelike piercers. The antenna3 are usually short and filiform, though in some of the Heteroptera they may be almost as long as the body. Many of the Rhynchota are provided with glands which secrete an offensive fluid, in Chnex and Anasa, and in the CoccidiTB wax-glands are also abundantly present, producing a secretion which may cover the body with Avaxen scales, or in some cases form a wool-like mass covering the greater part of the abdomen {Pemphigtis). The Aphidje also possess as a rule upon the antepenultimate abdominal segment a ])air of tubular elevations or papillse from which a sweet secretion issues, the so-called "Honey-dew," which covers the leaves and stems of the plants upon which the Insects live, and is eagerly sought for by various Insects, more especially by Ants. The larvsB of the Rhynchota as a rule resemble the adults even to the structure of the mouth-parts, and the metamor- phosis is consequently gradual. The Cicada forms, however, an exception to this rule, the lar,,;, occurring beneath the surface of the ground and living upon the rets of trees. It becomes transformed into a pupa, which, however, con- tinues to lead an active existence, becoming quiescent only a short time before the moul
Size: 1850px × 1351px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyo, bookyear1894
