Systematischer Index. 



Seite 



I. Allgemeiner Teil 1 



(Historischer Überblick.) 



II. Systematischer Teil 32 



(Die Familie der Hydrachniden.) 



Erste Interfamilie : Hygrobatinae ... 39 



I. Genus: Atax (J. C. Fahricius) Bruzelius ... 41 



1. Atax i/psilophunit: (Bonz) Claparede ... 43 



2. Atd.r intermeilins Koenike 46 



3. Ata.r honzi Clapai-ede 48 



4. Atax crassipes 0. F. Müller (Bruzelius) . . 62 



5. Atax fii/itralis C. L. Koch 57 



6. Atax acttleatus Koenike 59 



7. Atax tricusjiis Koenike 60 



II. Genus: Cochleophorus Piersig 60 



1. Cochleophorus spinijjes Müller 62 



2. Cochleojihorxs deltoiiles Piersig 67 



3. Cochleophorm rercalis (Müller) C. L. Koch) . 68 



4. Cochleophorus verrucosus Koenike .... 71 



5. Cochlfophni-ux callnsiis Koenike 72 



III. Genus: Hydrochoreutes C.L.Koch 73 



1. Uijdrochoreutes ungulatus (Koch) Piersig . . 75 



2. Hi/drachoreutes krameri Piersig 79 



IV. Genus: Curvipes Koenike 80 



1. Curvipes aduncopalpis Piersig 88 



2. Curcijjes coiiytobatus C. L. Koch 92 



3. Curviyes carneus C. L. Koch 97 



4. Curvipes uncatus Koenike 101 



5. Curvipes lomjipalpis Krendowskij .... 103 



6. Curvipes nodatiis Müller 108 



7. Curvipes fuscatus Hermann ... . . 114 



8. Cureipes rottindus Kramer 118 



9. Curvipes rufus C. L. Koch 123 



10. Curvipes thoracifer Piersig 128 



11. Curvipes neunuini Koenike 132 



12. Curvipes coaclus Koenike 133 



13. Curvipes circidaris Piersig 134 



14. Curvipes obturbnns Piersig 135 



16. Curvipes controversiosus Piersig 137 



16. Cu>ripes anibiguus Piersig 138 



Seite 



V. Genus: Piona C.L.Koch 139 



1. J'ioiia i'nsifoniiis Koenike 141 



2. Fiona ornata C. L. Koch 143 



3. Piona latipes 0. F. Müller 148 



4. Fiona torris Müller 152 



5. Piona scatira Koenike 166 



VF. Genus: Pionopsis Piersig 156 



Pionopsis hiti'scens Hermann 157 



VIT. Genus: Pionacercus Piersig 162 



1. Pionacercus leuckarti Piersig 163 



2. Pionacercus uncinatus Koenike 167 



VIII. Genus: Acercus C. L.Koch 169 



1. Acercus liliaceiis Müller . 171 



2. Acercus brevipes Piersig 176 



3. Acercus cassidiformis Haller 177 



4. Acercus trianijularis Piersig 180 



5. Acercus cetratus Koenike 181 



IX. Genus: Wettina Piersig 182 



Weitina macroplica Piersig 183 



X. Genus: Atractides C.L.Koch 186 



Atractides spinipes C. L. Koch 186 



XL Genus: Hygrobates C.L. Koch 191 



1. Hygrolmtes longijialpis Hermann .... 192 



2. Hygrobates reticulatus Kramer 197 



3. Hygrobates trigonicus Koenike 198 



4. Hygrobates nigro-maculatus Lehert .... 199 



5. Hygrobates caUiger Piersig 200 



XIL Genus: Limnesia C.L.Koch 202 



1. Limnesia histrionica Hermann 205 



2. Limnesia undiilata Müller 209 



3. Limnesia maculata (Müller) Bruzelius . . .211 



4. Limnesia Icoenikei Piersig 215 



5. Limnesia connata Koenike 217 



XIII. Genus: Teutonia Koenike 219 



Teutonia primaria Koenike 219 



XIV. Genus: Sperchon Kramer 222 



1. Sp(irhon glandiilosus Koenike 224 



2. Sperchon hispidus Koenike 227 



