16 



Dytiscid.e 



Stenocellus 



19149. carolinensis Csy. 24-142 N.C. 



50. veronianus Csy. 24-142 Fla. 



51. humboldtianus Csy. 24-142 



Cal. 



Acupalpus 



19152. subrectiis Csy. 24-143 111. 



53. curtipennis ' Csy. 24-144 111. 



54. canadensis ' Csy. 24-144 Que. 



Stenolophus 



19155. testaceicollisi Csy. 24-145 R.I. 



Stenolophus 



19156. Horidanus Csy. 24-145 Fla. 

 57. extensicollis ^ Csy. 24-145 Ariz. 



.58. rivularis ' Csy. 24-146 Mo. 



59. curticoUis Csy. 24-146 Md. 



Tachistodes 



19160. lyratus Csy. 24-147 Kan. 



61. obscurusCsv. 24-147 N.Y. 



62. convorgens Csy. 24-148 N.Y. L.I. 



Pseudomorpha 



19163. ruficollis Csy. 24-148 



La. 



OMOPHRONID^ 



Semenov-Tian-Shanski 22 



Homophron Sem. 22-41 



includes 2287 (type), 2284, 2289, 2283, 



2290; also 

 19164. lengi Csy. 20-135 S.C. 



65. illustre Csy. 20-136 Ut. 



2289, citation should read Lee. 52-200 



Prosecon Sem. 22-44 



includes 2294 (type), 2293; also 

 19166. decoloratum Fall 20-211 Kan. 



Paromophron Sem. 22-40 

 includes 2285 (type) 



Istor Sem. 22-43 



includes 2295 (type) 



2296 = 2295 fide Fall 20-211 



HALIPLID^ 



Zimmermann 20 



Haliplus 



19167. dorsomaculatus ' Zimm. 24-75 



N.Am. 

 68. minor Zimm. 24-193 Tex. 



2318 = immaculicollis Harr. fide Zimm. 

 24-73 



Peltodytes 



2332 = 2336 fide Zimm. 19-69 



DYTISCID^ 



Blatchley 19, 20; Zimmermann 20; Fall 19, 23 



Notomicrus 



2338 transferred to Canthydrus by 

 Zimmermann ' 



Canthydrus 



19169. addendus Blatch. 20-261 Fla. 



2342 = 2341 fide Zimm. 19-115; Blatch- 

 ley in a letter does not agree 



Hydrocanthus 



2348 = 2346 fide Zimm. 19-118 



Laccophilus 



2352a = 2352 fide Zimm. 20-18 

 2353 = 2351 fide Zimm. 20-21 

 2359a. rufus Melsh. fide Zimm. 20-18 



Hydrovatus 



2367 should be called pustulatus fide 

 Zimm. 20-35 



Desmopachria 



19170. mutchleri Blatch. 19-309 Fla. 



Bidessus 



19171. longovalis Blatch. 19-310 Fla. 

 72. subsericeus Blatch. 19-31 IFla. 

 2389b, locality should read Ariz. 



Bidessonotus Reg. 95-331 

 2388 belongs here 



2 Many changes proposed by Zimmermann have not been adopted by Fall 23 although cognizant thereof. Zimmer- 

 mann appears to have overlooked Blatchley. 



