THE CANADIAX ENTOMOLOGIST. 101 



f. Ariicles of antennae 23-32 ; spines of first 

 legs, 2, 3, 2 ; of penult legs 

 I, 3, 3, 2 L. hohinge?-i Bollman. 



{{. Articles of antennas 20 ; spines of first legs 

 I, 3, 2 ; of penult legs 

 I, 3, 3, I Z. ini7inesotce Bollman. 



bb. Claw of anal legs armed with one spine. 



c. Articles of antennae 20. 



Spines of first legs i, 3, i ; ocelli, 18-25 ; length, 



ic- 1 2 mm L. trilobus Bollman. 



cc. Articles of antennae 25-32. 



d. Spines of first legs 0,0, i L. exiguus Meinert, 



dd. Spines of first legs o, I, i-i, 2, i . Z. /'/z;/?/j' Chamberlin. 



bbb. Claw of anal legs armed with three spines. 



c. Claw of penult legs armed with two spines. 



Articles of antennae 20-31 ; spines of first legs 2, 3, 2 ; 

 of penult legs i, 3, 3, i ; of anal legs i, 3, 3, i-i, 

 3,3,2; length, 6-9 mm Z. carditialis Bollman. 



I. Lithobius mordax Koch. 



A species abundant in the south and south-east. 



Localities. — Tama, Iowa (common) ; Wisconsin (one young male, 

 probably this species) ; Nebraska (Kenyon). Also reported from Winona, 

 Minn. In 1887 Bollman reported the form from Indiana, but the following 

 year eliminated it from the State list, referring the specimens which he had 

 to the following species : 



2. Lithobius tyr annus Bollman. 



Localities. — Reported as common in Indiana at Bloomington, La 

 Fayette, Greencastle, Salem, New Providence. 



3. Lithobius juventus Bollman. 

 Locality. — Bloomington, Indiana. 



4. Lithobius howei Bollman. 

 Localities. — Reported from Ft. Snelling and Winona, Minn., and 

 from Bloomington, Kokoma and Dublin, Indiana. 



Lithobius forficatus (Linnaeus). 

 The most common chilopod in the northern sections of the L^nited 

 States. It is exceptionally abundant throughout Wisconsin. 



