18 



Hydrophilid.e 



Agabus 



10242. ambiKnus Say 23-96 and Fall 22-21 



Can.-Va. Man. 

 rctic'ulatus % Aube 38-355 

 fimhriatus Lee. 51-214 

 25()5, Fall prefers INIelsheimer's name 

 lutosus 

 43. subfuscatus Sharp 82-514 and Fall 22-28 

 Mass. TU. 

 2545, citation should read 57-34 

 2583, rea<l leptapsis not leptopsis 



Carrhydrus Fall 22-35 



19244. crassipes ^ Fall 22-35 Alb. 



Copelatus 



li)245. debilis Sharp 82-579 



Fla. 



Rhantus 



2622 occurs in Europe also 



Colymbetes 



2()29 and 2635 are varieties of 2634, 

 Zimm. 19-223 

 263()a. inie(|iialisHorn = 2630a Zimm. Cat. 



Colymbetes 



19246. exaratus Lee. is valid Zimm. 19-223 

 2628 = dahuricus Aube 38-227, Zimm. 

 Cat. 



2634 occurs in Europe also 



Dytiscus 



{Macrodyies C. G . Thorns. 60-41) 

 Except 2646, all our species belong to this 

 subgenus, fide Zimm. Cat. 

 2640 = cordieri Aube fide Zimm. Cat. 



19247. anxius Mann. 43-218 is valid fide Zimm. 

 Cat. Alas. 



2645a. franklini Kby. 37-77 is a var.fide Zimm. 



Cat. Can. 



2645b. ventralis Mots. 55-79 is a var. fide Zimm. 



Cat. Alas. 



Acilius 



( IIomvEolyirns Gobert 74-441) 

 2653 belongs here fide Zimm. Cat. 



Graphoderes 



2661 and 2662 = zonatus Hoppe 95-33, 

 fide Zimm. Cat. Eur.Sib.H.B.T. 



2663 = austriacus Sturm 34-46, fide 

 Zimm. Cat. Eur. Sib. Cal. 



GYRINID^ 



Fall 22 



Dineutes 



2680, Citation should read Say 23-107 

 2682, Citation should read Say 23-108 



Gyrinus 



fraterculus Notm. 19- 

 Fall 22-285 



falli Notm. 19-131 = 

 22-300 

 19248. woodruffi Fall 22-282 



49. marginellus Fall 22-283 



50. latilimbus Fall 22-285 



51. bifarius Fall 22-286 



131 = 2689 fide 



N.Y. 

 2707a fide Fall 



N.Y. 



S.L 



N.J. 



Mass.Me.N.Y 



B.C. 



Me.N.Y.Cal. 



Gyrinus 



19252. pachysomus Fall 22-2^ 

 53. lecontei Fall 22-291 



=i N.C.Ala. 



Mass.Me.N.Y. 



Ont. 



Wyo.Colo.Cal. 



Mass.Me.N.Y. 



Man. 



Me.N.Y.La. 

 68-370 and Fall 



54. pleuralis Fall 22-292 



55. pugionis Fall 22-296 



56. wallisi Fall 22-302 



57. frosti Fall 22-303 



58. rockinghamensis Lee 

 22-279 N.C. 



2697 = 2699 fide Fall 22-297 



2698 = 2696? fide Fall 22-293 

 2708 = 2707? fide Fall 22-296 



2707a is a valid species fide Fall 22-299 



HYDROPHILID^ 



Knisch 24 



Ochthebius 



192.'>9. martini Fall 19-212 Cal. 



60. fossatus Lee. 55-362 and Fall 19-213 

 So. Cal. 

 tuberculatus Lee. 78-380 syn. fide Fall 

 19-213 N.Mex. 



foveicoUis Lee. 78-381 syn. fide Fall 

 19-213 Fla. 



(CofcaZiMsRey 85-24) 

 {Prionochthebius Kuw.?) 

 2728. vandykei Knisch 24-31 



lapidicolus || Van D. 18-306 



Hydrsena 



19261. angulicollisNotm.21-146 N.Y. 

 62. vandykei Orch. 23-42 Cal. 



Helophorus 



2744. lecontei Knisch 24-88 

 obscurus II Lee. 51-210 

 2748 is doubtfully N.Am. 



Cal. 



Hydrochus 



192(53. laticollis Notm. 19-132 N.Y. 



64. minimus Blatch. 19-317 Fla. 



65. brevitarsis Knisch 22-90 Mich. 



2770 = 2769a fide Knisch 22-111 

 2775 = 2774afide Knisch 22-111 

 2782 = 2781 fide Knisch 22-111 

 2784a. pennsylvanicus Knisch 22-119 



Pa. 



