138 Unizcrsiiy of Michhjan 



Pl.ATK XXMIl 



Zigrvadcsmus gniananus, sp. nov. 

 Fig. 195. Last tergite, dorsal view, x 17. 



Zigzvadcsmus modestus, sp. nov. 



Fig. 196. Fourth and fifth keels, x 30. 



Fig. 197. Tenth keel, x 30. 



Fig. 198. Thirteenth and fourteenth keels, lateral view, x 30. 



Fig. 199. Last tergite, dorsal view, with setae omitted, x 30. 



Ariomis ulophilus, sp. nov. 



Fig. 200. Anal scale, x 75. 

 Fig. 201. Tenth keel. 



