572 



INSECTA. 



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

 feed on animal juices. 



Fam. Notonectidse (Riickenschwimmer). Cori.cn striata L., Nutonecta ijldiica 

 L., water-bug. 



Fam. Nepidae, water-scorpions (fig. 475). JYanmris cimwoides L., .AV/w 

 cint'rca L., water-scorpion. Runatra luicaria L. 



Tribe 2. Geoeores (Land-bugs). Antennae directed forwards, and 

 of medium length, having four or five joints. The rostrum is usually 

 long. 



Fam. Hydrometridae (Pictures) (Wasserlaufer). Hydi'oihetra larn$t>'i* L., 

 Limnobatex gtat/ni'nni L., Velio, rinilnrum Latr. 



Fam. Eeduvidae (Red acini) (Schreitwanzen). Reduritix iwrxmiatus L., 

 Pirates stritJulttn Fabr., South Europe. 



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

 bug. Aradus depn-nsus Fabr. (corticalis L.). 



Fam. Capsidae (Blind wanzen), Capsus ti'ifasciatus'L., 

 3fi>'is errfiticiis L. 



Fam. Lygaeidae (Lygeeodes) (Langwanzen). Lygfeus 

 eqiti'stris L., Pyrrlmcori* iiptrrus L. (Feuerwanze). 



Fam. Coreidae (dn-endex) (Randwanzen). Curi'im 

 HHirffiHatiis L., Alydtis calcaratus L. 



Fam. Pentatomidas (Schildwanzen). Pcntatonia juni- 

 pera L., P. riijij)es L., P. olern-cen. 



Order 6. Diptera * (Antliata). 



Insects with piercing and sucking month parts, 

 ivith membranous front winys. 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 outer lobe (alula), and an inner one (squama) which may cover 



* J. W. Meigen, '' Systematische Beschreibung der bekannten europaischen, 

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



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

 1828-1830. 



N. Wagner, u Ueber die viviparen Gallmiickeularven," Zeitschr. fur. u-isx. 

 l., Tom. XV., 1865. 



A. Weissmann, " Die Entwickelung der Dipteren,'' Leipsig. 1864. 



A. Weissmann. ' Die Metamorphose der Corethra plumicornis," 1806. 



FlG. 475. Nepa ctnerea 

 (regne animal). 



state of matters. 



