HYDROPHILIDAE — SILPHIDAE. 



19 



pantherinus Zee. 

 peregrinus Lee. 



Hydrophilus per. Herbst. 



Ber. auritus Mels. 

 fraternus Zee. 

 striatus Say. 

 infuscatus Zee. 

 californicus Motsch. 

 punctulatus Li c. 

 exilis Lee. 

 exiguus Zee. 



Hydrophilus ex. Say. 



Ber. pallescens Lee. 



§ Volvulus Brulle. 

 altus Lee. 



LaccoMus Er. 



agilis Randall. 



punctulatus Mels. 

 ellipticus Lee. 



Sperchopsis Lee. 



tesselatus /.< c. 



Spercheusi tess. Zcigler. 



Cyllidium Er. 



atrum Lee. n. sp. 

 nigrellum Lee. 

 pallidum Lee. 

 nigriceps Zee. 



Pliilhydrus Sol. 

 § Helochares Muls. 



rotundatus Lee. 



Hydrophilus rot. Say. 

 fimbriatus M< Is. 

 fuscus Motsch. 

 lacustris Lee. 

 simplex L< e. n. sp. 

 imbellis Zee. 

 maculicollis (Muls.) 



§ Philuydrus Muls. 



nebulosus Zee. 



Hydrophilus neb. Say. 

 pectoralis Lee. 



maenlifrons Motsch. 

 cristatus Lee. 



?obtusiusoulu8 Motsch. 

 carinatus Zee. 

 diffusus Lee. 

 latiusculus Motsch. 

 perplexus Zee. 



ochraceus Mels. 

 cinctus Lee. 



Hydrophilus cinct. Say. 



Ph. limbalis Mels. 

 bifidus Zee. 

 normatus Zee. 



Ulydrooius Leach. 



tumidus Zee. 

 globosus Lee. 



Hydrophilus gl. Say. 

 insculptus Zee. 

 regularis Zee. 

 seriatus Zee. 

 fuscipes Curtis. 



Dytiscus fuse. Linn. 

 dorsalis Motsch. — 

 digestus Zee. 

 infuscatus (Motsch.) — 

 subcupreus Lee. 



Hydrophilus subc. Say. 



Cyclonotum subc. Lee. 

 despectus Zee. n. sp. 



SPHAERIDIINI. 



Cyclonotum Er. 



cacti Zee. 

 estriatum Er. 



Hydrophilus est. Say. 



Cyc. globulosum Muls. 



Cercyon Leach. 



pubescens Lie. 

 fimbriatum Mann. 

 flavipes Er. 

 nigricolle Zee. 



Sphaeridium nig. Say. 

 lunigerum Mann. 

 limbatum Mann. 

 fulviperme Mann. 

 centrimaculatum Er. 



Cere, mundum i\t</s. 

 praetextatum Say. 

 adumbratum Mann. 

 ocellatum M'ls. 



Sphaeridium oc. Say. 

 anale Er. 



maculatum Mels. 

 apicale Mels. 



Sphaeridium ap. Say. 

 posticatum Mann. 

 nanum Mels. 

 minusculum ^fels. 



§ Pelosoma Muls. 

 capillatum Zee. 



Megastermim Muls. 



costatum Zee. 



tryptopleiuum 



Muls. 



vagans Lee. 1 



SILPHIDAE. 



SILPHIDAE (genuini). 

 SILPHINI. 



ftecropliorus Fabr. 



mediatus Fabr. 

 marginatus Fabr. 

 melsheimeri Kirby. 

 guttula Motsch. 

 americanus Oliv. 



grandis Fabr. 

 pustulatus Ilerschel. 



bicolon JYewm. 

 nigrita Mann. 

 pollinctor Lee. 

 mortuorum Fabr. 



pygmaeus Kir by. 



crispetus Motsch. 

 orbicollis Say. 



hallii Kir by. 



var. tibialis Lee. 

 lunatus Zee. 

 confossor Lee. 

 tardus Mann. — 

 maritimus Mann. 



var. infodiens Mann. 



var. ]iollinctor|| Mann. 



var.? labiatus Motsch. — 

 defodiens Mann. 

 velutinus Fabr. 



tomentosus Weber. 

 obscurus Kirby. — 

 hebes Kirby. — 



Silplia Linn. 

 § Necrodes Wilkin, 

 surinamensis Fabr. 



' Sphaeridium pallidum, Uu oe, and unistriatum Beauv. cannot be Identified by the figures and 

 descriptions: tin- firsl two, according to Chevrolat, are Odmptodes. If this determination be cor- 

 rect, they are not fouud within our territories. 



