. Elementary text-book of zoology, tr. and ed. by Adam Sedgwick, with the assistance of F. G. Heathcote. 572 IXSECTA. more or less hidden from view. The rostrum is short. They feed on animal juices. Fam. Notonectidae (Rlickenschwimmer). Corixa striata L., Notoiiccta glauca L., '. Fam. Nepidae, water-scorpions (fig. 475). Naucoris cimicoidcs L., Xcpa clncrca L., water-scorpion. Ilanatra linear is L. Tribe 2. Geocores (Land-bugs). Antennae directed forwards, and of medium length, having four or five joints. The rostrum is usually long. Fam. Hydrometridas (Plotcrcs) (Wasserlaufer). Ifyd
. Elementary text-book of zoology, tr. and ed. by Adam Sedgwick, with the assistance of F. G. Heathcote. 572 IXSECTA. more or less hidden from view. The rostrum is short. They feed on animal juices. Fam. Notonectidae (Rlickenschwimmer). Corixa striata L., Notoiiccta glauca L., '. Fam. Nepidae, water-scorpions (fig. 475). Naucoris cimicoidcs L., Xcpa clncrca L., water-scorpion. Ilanatra linear is L. Tribe 2. Geocores (Land-bugs). Antennae directed forwards, and of medium length, having four or five joints. The rostrum is usually long. Fam. Hydrometridas (Plotcrcs) (Wasserlaufer). Ifydromctra lacustris L., Limnobatfx stagnoritm L., Velio, riculonim Latr. Fam. Reduvidae (Pcdnvini) (Schreitwanzen). Meduvius pcrsonatus L., Pirates stridiilvs Fabr., South Europe. Fam. Acanthiadae (Membranacei), skin-bugs. Acanthia, lectularia L., bed- bug. Aradus deprcssus Fabr. (corticalis L.). Fam. Capsidae (Blindwanzen), Cap&us trifasciatus L., Miris erratic-its L. Fam. Lygaeidae (Lygaodes) (Langwanzen). Lygaus equestris L., Pi/rrhocoris apterus L. (Feuerwanze). Fam. Coreidas (Corcndcs) (Randwanzeu). Coreus marginatus L., Alydiis calcaratus L. Fam. Pentatomidae (Schildvvanzen). Pentatomajuni- pera L., P. rujipes L., P. oleracea. Order 6.— Diptera * (Antliata). Insects with piercing and sucking mouth parts, with membranous front wings. The hind wings reduced to small knobs (halteres}. The metamor- phosis is complete. The designation of this order, which is de- rived from the apparent number of the wings, does not correspond accurately to the actual Two pairs of wings are present, the front pair always as large glassy and transparent plates, the hind pair in a rudimentary condition as stalked knobs (halteres). On the inner margin of the front wings two lobes are marked off by indentations; an ou'.er lobe (alula), and an inner one (squama) which may cover * J. W. Mcicfen, " Systematische Beschrcibung der bckanntcn europiiischen, /weifiiigeligen Insecten," 7 Theil
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