44 BULLETIN 46, UNITED STATES NATIONAL MUSEUM. 



bb. Coxal pores in a single series, transverse, 

 c. Penultimate pair of legs armed with a single claw; antennae 30 to 38, jointed; 

 prosternal teeth 6 + 6 or 7 + 7; last two tarsal joints of anal legs dis- 

 tinctly or not sulcate mordax Koch. 



cc. Penultimate pair of legs armed with a double claw. 

 d. Last two tarsal joints of anal legs sulcate on inner side, likewise the penul- 

 timate pair; antennae 31 to 36, jointed; prosternal teeth 6 + 6 to 8 +8; 



length of body 18 to 26 mm tyrannicus Bollman. 



dd. Last two tarsal joints of anal and penultimate pairs of legs uot sulcate; 

 antennae 40 to 49, jointed ; prosternal teeth 6 + 6 to 11 + 11 ; length of 



body 20 to 37» ira vorax Meinert. 



bbh. Coxal pores in several series; claws of penultimate pair of feet two; joints of 

 antenna?, 40 to 47 ; ocelli 13-4 to 26-5 ; prosternal teeth 8 + 8 to 10 + 10 ; 



claw of female genitalia not divided terreus Fedrizzi. 



aa. Anal and penultimate pairs of legs each armed with two claws ; coxal pores in a 

 single series, round; coxa not armed beneath; antenna) 31 or 32, 

 jointed; prosternal teeth 2 + 2; spines of first pair of feet 1, 1, 1. 



juvenilis Bollman. 



Iii the above key I have introduced the European species, Lithobius 

 terreus Fedrizzi ; I can not find any true specific characters to separate 

 Lithobius leptopus Latzel from it. 



Concerning the geographical distribution of these species I may say 

 that transmarinus has been found in Louisiana, Arkansas, and Indian 

 Territory; clams in Florida; latzeli in Virginia and North Carolina; 

 mordax from Florida to Indian Territory, then north to Minnesota; tyr- 

 annicus in Indiana; vorax from Mississippi to Indian Territory; and 

 juventus in Indiana and Tennessee. 



Indiana University, January 20, 1888. 



