INDEX. 



marginatus, Gyr. 44 

 Gyr. 46 



Hydr. 40 



Porr. 48 



margineguttatus, Ac. 11 

 marginellus, Gyr. 47 

 marginepennis, Or. 47 

 marginepunctatus, Hal. 2 

 marginethorax, Cyb. 7 

 marginicollis, Hydrop 34 

 marginipennis, Cop. 26 

 Maria, Dyt. 9 

 marinus, Gyr. 45 

 Marklini, Hydr. 39 

 marmoratus, Hyd. 12 

 Hydr. 42 

 Martini, Dyt. 9 

 Mathesoni,*Hyd. 11 

 Matus, 27 

 mediatus, Ac. 10 

 melanarius, Ag. 25 

 Gyret. 48 



Hydr. 40 

 melanocephalus, Hal. 2 



Hydr. 39 



Hydr. 40 



melas, Ag. 24 

 memnonius, Hydr, 40 

 mergus, Gyr. 44 

 meridionalis, Ilyb. 20 

 Cyb. 5 

 Hydr. 42 



metallicus, Din. 49 

 mexicanus, Col. 17 

 Din. 48 

 Laccoph. 29 , 

 mieans, Din. 49 

 Miersii, Hydrop. 33 

 minimus. Dyt. 42 

 Hydr. 41 



minutissimus, Hydrop. 33 

 minutus, Gyr. 45 

 Hydr. 41 

 Lace. 29 

 mixtus, Hyd. 14 

 Modeeri, Gyr. 47 

 modestus, Hydr. 38 



Gyr. 45 

 monaulacus, Hydrop. 33 

 monostigma, Col. 18 

 montanus, Ag. 21 

 morio, Gyret. 47 

 Hydr. 40 

 mucronatus, Hal. 1 

 multistriatus, Cop. 26 

 murinus, Hydr. 38 

 musicus, Hydrop. 32 



NAN us, Hydrop. 33 

 natator, Gyr. 44 45, 

 nebulosus, Ag. 23 

 Col. 23 

 neglectus, Ag. 21 



neglectus, Hydr. 43 

 Neuhoffii, Hydrop. 34 

 niger, Hydr. 38, 40 

 nigerrimus, Ag. 22 

 nigriceps, Col. 17 

 nigricollis, Ag. 23 

 nigrinus, Hydroc. 28 

 nigrita, Hydr. 40, 41 

 nigro-seneus, Ag. 21 

 Ag. 21 



nigrofasciatus, Ac. 

 nigrolineatus, Hydr. 37 



Hydrop. 36 



nigrorematus, Col. 17 

 nilicola, Hal. 2 

 nitens, Gyr. 45 

 nitida, Desm. 31 

 nitidulus, Gyr. 45 

 nitidus, Ag/21 



Ag. 23 



Col. 18 



Dyt. 24 



Hydr. 39 



Hydrop. 33 

 nivalis, Hydr. 43 

 notasicus, Cyb. 6 

 notaticollis, Col. 16 

 notatus, Col. 16 



Hydr. 41 

 Noterus, 27 

 notula, Hydroc. 28 

 novemlineatus, Hydrop. 37 



OBESUS, Hyph. 30 

 obliquatus, Gyr. 43 

 obliquus, Hal. 1 

 oblitus, Hydr. 40 

 oblongus, Col. 20 

 Hydr. 39 



Hydr. 40 

 Laccoph. 28 

 obscura, Gel. 30 

 obscuricollis, Col. 17 

 obscurus, Dyt. 28 



Hydr. 41 

 ,, Hydrop. 33 



Ilyb. 19 



obsoletus, Hydr. 39 

 obtusatus, Ac. ? 25 

 occidental, Cyb. 5 

 Eun. 10 

 octodecimmaculatus, Ag. 22 

 octopustulatus, H. ? 43 

 octostriatus, Col. 26 

 olivaceus, Ag. 21 



Gyr. 48 



ontariensis, Dyt. 9 

 Onychohydrus, 7 

 Ooligbuckii, Dyt. 8 

 opacus, Ag. 24 

 Gyr. 45 

 opatrinus, Hydr. 37 

 Orectochilus, 47 



