572 



IXSECTA. 



more or less hidden from view. The rostrum is short. They 

 feed on animal juices. 



Fam. Notonectidae (Riickenschwimmer). Corlxa striata L., Nutonecta glauca 

 L., water-bug. 



Fam. Nepidae, water- scorpions (fig. 475). Naucoris cimicoides L., Nepa 

 cincrea L., water-scorpion. Ranatra 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. Hydrometridae (Plater es) (Wasserlaufer). Hydromctra lacustris L., 

 Limnobates stagnorum L., Velia riculorum Latr. 



Fam. Reduvidse (Reduvini) (Schreitwanzen). Reduvius personatu-s L., 

 Pirates stridulus Fabr., South Europe. 



Fam. Acanthiadae (Membranacei), skin-bugs. Acanthia lectularia L., bed- 

 bug. Aradus depressus Fabr. (corticalis L.). 



Fam. Capsidae (Blindwanzen), Capsus trifasciatus L., 

 Miris erraticiis L. 



Fam. Lygaeidae (Lygaodes) (Langwanzen). Lygceiis 

 equestris L., Pyrrliocoris apterus L. (Feuerwanze). 



Fam. Coreidae (Corcodcs) (Randwanzen). Coreus 

 vnarginatiis L., Alydus calcaratns L. 



Fam. Pentatomidae (Schildwanzen). Pentatomajuni- 

 pera L., P. rvfipes L., P. olcracea. 



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- 

 2)hosis 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. Mcigen, " Systematische Beschreibung der bekanntcn europaischen, 

 zweifliigeligen Inscctcn," 7 Theile. Aachen, 1818-1838. 



Wiedemann, " Aussereuropaische zweifltigelige Insecten," 2 Theile. Hamm. 

 1828-1830. 



N. Wagner, " Ueber die viviparcn Gallmiickenlarven," Zcitschr. fiir. wiss. 

 Zool., Tom. XV., 1SG5. 



A. Weissmann, " Die Entwickelung der Dipteren," Lcipsig. 1864. 



A. AVeissmann. " Die Metamorphose der Corcthra plumicornis," 1806. 



FIG. 475. ]\~epa cincrea, 

 (regne animal). 



state of matters. 



