OF THE UNITED |23 



tice marginata rotundata, parum convexa: antennae articulo 1 dento interno 



vix prominnlo: tarsi non lobati: 



Ungues simplices: tarsi mediocre - - - Cryptohypnus. 



lies medio nnidentati: tarsi elongati pubescentes - Oedostethos. 



2. Tarsi non lobati, sublus dcnsius p ' . ■ I siepius inflati el peniceliati : antenna sap* 

 receptee; mesoslernum seep* protuberans ; prosternum semper mucranatum d lobatum: 



'( frons modicevel vix marginata ;) (lamina coxarumangusta,non vel ri->- subito dilataise.) 

 II. Antennae receptee ; thorax vesiculis nullis : 



Antennae articulo ultimo, i-tricto - - - Adelocera. 



Antennae articulo ultimo eonstricto .... 

 I. Antenna? non receptae ; thorax vesiculis luminiferis: 



Anuii: L2-articulatae ..... Pyrophorus. 



K. A non recepta*; mesostcrnum protuhcraii : . rcsiculu nullis: 



Frons Bei livis; tarsi medioc 



ixae posticae laminis postice sinuatis .... Aphanol 

 non sinuatis .... Melanacl 

 Frons subito declivis ; tarsi crassiusculi ; 



Mesosternum Jistinctum ..... , :I .. 



Mesostcrnum connatum ..... Chalcolepidios. 



3. Tarsi pul ; ,; , nee inflati, nee peniceliati; ai !a ; 

 mesosternum protuberans; prosternum anlict lobatum, co brevi truncate ; 



<r'mutu, ui rii.) ....... Cardiophorus. 



Campyi 'ier. 



A. Tarsi articulis '2 — 1 sublus ad apicem sp 



1. C. productus, aeneo-pici i-pubescens, thorace planinscolo confortim ponotato, latitudine 



ribns rectis parallelis, fortius marginatis, margin 

 tris seriatim \ triatis, interstitiia pun 



/.' Elan lall, Boat. Journ. Nat. 11 



Lake Superior, tw nens; Maine, Randall. 



I!. Tarsi sublus sequaliter pubescentes, noti spongiosi. 



2. C. dentioornis, ater, parce flavi 



fronte thoracisque margine omni pallido, boo canaliculato, paulo intcquali, 

 tudine non longiore, . confertim rugose p 



tenui - Long. • 13. 



K:. \:n. 1 l.".; Germar, Lini i B I I, 1 ' 



■■;• r. Proc. lead. Nat. 8c. 2, 219. 



Lake Superior, Maine, and Pennsylvania. In the male th< sides ol ihc (fa 

 slightly Binuous, and the antenna? are longer than in the female. 



\cll 



