Procamharus pearsei (Creaser) 



With one or two spines on each side of the carapace just behind the cervi' 



cal groove (mid area, not at anterior extremity) ; usually with a spine 



on each side of the rostrum near the tip (sometimes lacking in P. fallax) ; 



southern states 24. 



24. With two spines on each side of the carapace just behind the cervical 



groove 25. 



With one spine on each side of the carapace just behind the cervical groove 



26. 



25. Sides of rostrum almost parallel; chela with many small tubercles 



Procamhdrus versutus (Hagen) 

 Sides of rostrum more definitely converging; chela with scattered large 

 tubercles 



Procamharn,s spiculifer (Le Conte) 



26. Rostrum almost flat above; areola about onchalf as wide as long 



Procamharus puhescens (Faxon) 

 Rostrum concave; areola narrower 27. 



27. Sides of rostrum almost parallel 



Procamharus angiistatus (Le Conte) 

 Sides of rostrum more definitely converging 28. 



28. Anterior section of carapace two and onc'half times as long as the pos' 



terior section 



Procamharus lecontei (Hagen) 

 Anterior section of carapace two and one-third times as long as the pos' 

 terior section 



Procamharus fallax (Hagen) 



29. Areola linear or obliterated; southern states 30. 

 Areola not so 31. 



30. Rostrum short, flat, and with very small lateral spines (one on each side 



near tip) 



Procamharus troglodytes (Le Conte) 

 Rostrum longer, concave, and with strong lateral spines 

 Procamharus clar}{ii (Girard) 



3L Outer branch of first pleopod of male with three small projections 32. 



Outer branch of first pleopod of male with one or two rather plate-like 



projections 35. 



32. Anterior margin of carapace angled below the eye; first pleopod of male 



with moderate tips extending forwards; widely distributed 33. 



Anterior margin of carapace not angled; southern states 34. 



33. Sides of rostrum almost parallel, with a strong spine on each side near 



tip 



Procamharus hlandingii (Harlan) 

 Sides of rostrum more sharply converging, with a weak spine on each side 

 near tip 



Procamharus hlandingii acutus (Girard) 



34. Areola narrow, with much curved sides; chela long and narrow; first pleo' 



pod of male straight 



196 



