1855.] 293 



13, elytris densius punctatis 63. suturalis Lee. 



m. Thorax elytris conspicue angustior ; 

 a.. Ovales convexi ; supra testacei, 

 13, elytris mixte punctatis et punctulatis 64. ovoideus Lee. 



15, densius punctatus, thoracis elytrorumque medio infus- 



cato 65. medialis LecA 



15, punctatus, elytris postice infuscatis 66. fraternus Lec. x 



/?. Longiores, minus convexi, punctati vel subtile punctati ; supra 

 piceo-testacei, 

 15, thorace elytrisquevix infuscatis distinctius punctatis 67. patruelis. 

 15, thoracis medio elytrisque infuscatis, convexior 68. lutescens Lee. 1 



17, adhuc longior, thoracis medio elytrisque postice in- 

 fuscatis 69. nubilus. 

 15, latior, thorace ad basin, elytris ia disco infuscatis 70. discoideus. 



M. Subovati, convexi subtiliter pubescentes, epistoma ad medium late emar- 

 ginatum. 



14, punctatus, testaceus, elytris nigris fasciati3 72. hybridus Aube. 



09, flavo-testaceus subtilias punctatus, elytris piceis ad 



latera maculatis 73. mellitus. 



The following species are not included in the above list, as I have not had 

 specimens for examination : 



From Russian America ; 74, H. griseo-striatus De Geer ; 75, H. ob?ongus Aube ; 

 76, H. humeralis Aube; 77, H. contractulus Mannh. ; 78, H. ruficapillus Mannh. ; 

 79, H. rufinasu3 Mannh. ; 80, H. ervthrostomus Mannh. No. 75 ia clo ? ely allied 

 to H cataseopium Say. Nos. 78 81 are described in the Bull. Moss, for 1852, 

 pp. 304, 305. 



From Atlantic America; 81, H. aulicus Aube; 82, H. nigro-lineatus Steph. 

 (fide Kirby, Fauna Bor. Am. 66); 



\ 1. Synonyms and Doubtful Species. 



H. laevis Kirby, is possibly a variety of H. 12-lineatus Lee, and according to 

 Mr. White, (Cat. British Museum,) is H. alpinus Paykull. 



H. ruficeps Aube seems not sufficiently distinct from H. modestus Aube. 



H. limbalis Mels. is probably the female of No. 53, H. oblitus Aube, with which, 

 according to a typical specimen, H. luridipennis Mels. is identical. 



H. discicollis Say, according to Dr. Harris, is H. dichrous Mels., but the des- 

 cription is very unsatisfactory, and I have been compelled to regard it as inde- 

 terminate. 



H. interruptus and H. parallelus Say, are not different from H. catascopium. 



H. hirtellus Lee, is smaller and more pubescent than H. subpubescens Lee. 

 but is probably only the female of that species. 



H. fasciatus Harris (S. Engl. Farmer, ^ec, 1828) is H. undulatus Say ; the 

 male is H. pubipennis, and the female H. velutinus Aube ; for a typical specimen 

 I am indebted to Dr. Harris. 



H. proximus Aube is probably H. oppositus Say, (vide infra No. 27.) 



H. punctatissimus Aube is H. niger Say. 



H. pulicarius Aube is H. lacustris Say. 



H. nanus Aube is H. affinis Say ; for a type I return my thanks to Dr. Harris. 



Hygrotus pustulatus Mels. is H. cuspidatus. 



H. humeralis|| Lee. is now H. axillaris Zee. 



E. luridipennis|| Le". Agassiz' Lake Superior, 216, is now H. lutulentus Lee. 

 (No. 50 1 .) Farther investigation, aided by more extensive series of specimens, 

 may show the necessity of uniting with it H. tenebrosus, from which it differs 

 principally in color. 



$ 2. Descriptions and Notes. 



1. H. f a r c t u s breviter ovalis, postice subacutus, ferrugineus glaber, capite 

 punctulato, baud marginato, thorace confertim subtiliter punctulato, lateribus 



