46. Sides of areola much curved 



Camharus jordani Faxon 

 Sides of areola not much curved 47. 



47. Claws of chela about as long as the basal portion; lateral spines of cara- 



pace strong 



Camharus extraneus Hagen 

 Claws longer; lateral spines of carapace very small 



Camharus extraneus Hagen (var. giardianus) 



48. Part of areola obliterated 49. 

 Areola not obliterated; eastern and central states to Texas 51. 



49. Claws not hairy at base; widely distributed 



Camharus diogenes Girard 

 (Camharus ohesus Hagen) 

 Inner claw hairy at base 50. 



50. Sides of rostrum converging; rostrum deeply hollowed out and with a 



lengthwise groove at base; widely distributed 

 Camharus argillicola Faxon 

 Sides of rostrum almost parallel; rostrum shallow and scarcely grooved at 

 base; Maryland 



Camharus uhleri Faxon 



51. Areola narrow, onc'third or less as wide as the rostrum 52. 

 Areola moderate to wide, usually more than one-half as wide as the ros' 



trum 55. 



52. Abdomen of normal length; thorax depressed 



Camharus latimanus (Le Conte) 

 Abdomen much shorter than the cephalothorax ; thorax scarcely wider 

 than deep 53, 



53. Sides of rostrum converging 



Camharus carolinus (Erichson) 

 Sides of rostrum almost parallel 54, 



54. Tip of rostrum indistinctly defined; color usually blue 



Camharus monongalensis Ortmann 

 Tip more distinct from rest of rostrum; color more often red 

 Camharus duhius Faxon 



55. Margins of rostrum not swollen 



Camharus montanus Girard 

 (Camharus hartoni acummatus (Faxon) ) 

 Margins of rostrum swollen 56, 



56. With more than iive dots in the narrowest part of the areola 



Camharus longulus Girard 

 With two to five dots in the narrowest part of the areola 57, 



57. Sides of carapace curved; claws gaping at base 



Camharus hartoni (Fabricius) 

 Sides of carapace flattened; claws meeting throughout length 

 Camharus hartoni rohustus (Girard) 



198 



