.1 MONOGRAPH OF THE PILL-MILLIPEDES. 473 



curved comolti Poc 



b^". Lamina of 2nd 



tergite smaller ; digits 

 of first pair of forceps 

 straight and very 



unequal gestri Poc. 



(i^. Second tergite not crossed in front 

 by a supernumerary groove, 

 a". Of small size (19 mm.) ; vulva 

 longer than wide ; anal ridge 



longer e.icavata (Bntl.) 



b^\ Of larger size (30 mm.); vulva 

 broader than long, anal 

 crest shovtev,..7nacuIata(But[.) 



Explanation of Plate B. 

 Fio". 1 ArthrosphcBi'a versicolor : natural size. 



,1 i-t) t. 1* 



lateral view of 2nd tergite. 

 posterior forceps of copulatory 



'J 

 11 



J? 



noticeps ; 

 zehraica 



organ, 

 anterior forceps of copulatory 



organ. 

 voiva. 

 anterior view of head, 

 vulva. 



natural size. 

 „ vulva. 

 lutescens : lateral view of head and 2ud 

 tergite. 

 „ vulva. 

 atrisparsa: anterior forceps of copulatory 



organ. 

 marmorata : side view. 



„ vulva. 



piUfera : leg to show spine armature. 

 8 Zephronia tumida : natural size. 

 8a „ „ anterior forceps of copulatory organ. 



Ic 



Id 



2 



2a 

 3 



4a 

 5 



6 



6a 

 7 



