THE MYRIAPODA OF NORTH AMERICA. 185 



19. Lithobius tuber Bollman. 

 Not coumion. 



20. Lithobius holzingeri Bollman. 

 Lithobius hohingeri Bollman. Ent. Amer., 83, 1887 (Winona, Minn.). 

 Commou. 



21. Lithobius bilabiatus Wood. 

 Not common. 



22. Lithobius forficatus (Limi6). 



This is the most abundant myriapod around Winona, as is indicated 

 by the numerous specimens received. 



23. Lithobius howei Bollman. 



Eare. 



24. Lithobius mordax Koch. 



Eare. 



Specimens from the northern localities differ from those from other 

 places by having- the anal legs more flattened and shorter. 

 Indiana University, June 1, 1888. 



